CN102946296B - Method and terminal for interference signal reconstruction - Google Patents

Abstract

The invention discloses a method and a terminal for interference signal reconstruction, and belongs to the technical field of communication. The method comprises the steps as follows: modulating and demodulating an interference signal detected from a received signal, calculating to obtain one or more modulation symbols, and mapping the modulation symbol onto corresponding resource elements REs; calculating the corresponding channel estimation values of the interference signal on the REs; calculating power factors according to the received signal, the modulation symbols and the channel estimation values, wherein each power factor is a ratio of signal power to pilot power of the interference signal on each RE; and calculating the interference signal after reconstruction according to the modulation symbols, the channel estimation values and the power factors. According to the method, the problem of inaccurate interference signal after reconstruction obtained by calculation in the prior art is solved, thereby achieving the effect of accurately calculating the interference signal after reconstruction.

Description

Interference signal reconstructing method and terminal

Technical field

The present invention relates to communication technical field, particularly a kind of interference signal reconstructing method and terminal.

Background technology

In heterogeneous network, the multiple base stations can supporting multiple telex network can be comprised, user is communicated with base station with down link by up link, and wherein up link is the communication link of user to base station, and down link is the communication link that user is arrived in base station.But, because base station can send data to one or more user on the uplink, and receive the data of one or more user on uplink, so this just causes on the uplink, user can be subject to the interference of the transfer of data from adjacent base station when receiving the data of base station.

Especially, owing to there is polytype low power nodes as home evolved base station, Pico cell formula evolution base station and relaying etc. in the heterogeneous network of LTE or LTE-A, and there is overlapping covering between dissimilar base station, so under single carrier case, base station, user place uses identical frequency range with adjacent base station, and now user can be subject to the very strong co-channel interference of adjacent base station.

In prior art, the mode that those skilled in the art have proposed to be controlled by power reduces co-channel interference, also namely adjusts the signal power of interfered cell, and suitable change signal power and the ratio of pilot power improve the performance being disturbed user.But when interference signal reconstructs, still adopt the method calculating the interference signal after reconstruct according to the modulation symbol of interference signal and channel estimation value, so still there is very large error in the interference signal after the reconstruct that calculates of prior art.

Summary of the invention

In order to solve the inaccurate problem of interference signal after the reconstruct that calculates in the heterogeneous network of prior art, embodiments provide a kind of interference signal reconstructing method, described technical scheme is as follows:

First aspect, provide a kind of interference signal reconstructing method, described method comprises:

The interference signal detected from Received signal strength is carried out modulation /demodulation, calculates one or more modulation symbol, and each modulation symbol described is mapped on corresponding resource element RE;

Calculate the channel estimation value that described interference signal is corresponding on described RE; According to described Received signal strength, described modulation symbol and the described channel estimation value rated output factor, described power factor is the signal power of described interference signal on each RE and the ratio of pilot power;

The described interference signal after reconstruct is calculated according to described modulation symbol, described channel estimation value and described power factor.

In the first possible implementation of first aspect, described according to described Received signal strength, described modulation symbol and the described channel estimation value rated output factor, comprising:

Calculate the Received signal strength component of described Received signal strength on all or part of RE; Described Received signal strength component on each RE in described all or part of RE, described modulation symbol and described channel estimation value are obtained by formula distortion and residual term and form, described m is constant; Calculate described power factor.

In conjunction with the first possible implementation of first aspect, in the implementation that the second is possible, described described Received signal strength component on each RE in described all or part of RE, described modulation symbol and described channel estimation value distortion by formula is obtained and residual term and form, comprising:

If the number of the described modulation symbol calculated is n, described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

Described Received signal strength component on each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the arithmetic square root of power factor and residual term and form, then the expression formula after the RE distortion of described jth is:

The both sides of the expression formula after the distortion of each RE in a described i RE are added respectively rear square, that is: wherein, d _j ^*represent d _jconjugation, m=1.

In conjunction with the implementation that the second of first aspect is possible, in the implementation that the third is possible, the described power factor of described calculating, comprising:

The expression formula being added rear square according to the both sides of the expression formula after RE distortion each in a described i RE respectively calculates described power factor, that is: $P=\frac{{(\frac{R_1*{d_1}^{*}}{{H^{\′}}_1}+\frac{R_2*{d_2}^{*}}{{H^{\′}}_2}+...+\frac{R_i*{d_i}^{*}}{{H^{\′}}_i})}^2}{i^2}.$

In conjunction with the first possible implementation of first aspect, in the 4th kind of possible implementation, described described Received signal strength component on each RE in described all or part of RE, described modulation symbol and described channel estimation value distortion by formula is obtained and residual term and form, comprising:

If the number of the described modulation symbol calculated is n, described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

By the described channel estimation value normalization of each RE in a described i RE, then the described channel estimation value after the normalization of a described jth RE is: the described Received signal strength component of each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the product of the described channel estimation value after the arithmetic square root of described power factor, described channel estimation value and normalization and residual term and form, then the expression formula after the distortion of a described jth RE is:

The both sides of the expression formula after the distortion of each RE in a described i RE are added respectively rear square, namely

Wherein, d _j ^*represent d _jconjugation,

In conjunction with the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, the described power factor of described calculating, comprising: the expression formula being added rear square according to the both sides of the expression formula after RE distortion each in a described i RE respectively calculates described power factor, that is:

$P=\frac{{(R_1*{d_1}^{*}*\frac{{H^{\′}}_1}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+R_2*{d_2}^{*}*\frac{{H^{\′}}_2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+...+R_i*{d_i}^{*}*\frac{{H^{\′}}_i}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}})}^2}{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}.$

In conjunction with the third possible implementation of first aspect or the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation, described according to the described interference signal after described modulation symbol, described channel estimation value and described power factor calculating reconstruct, comprising:

If the sub-interference signal after the reconstruct that a described jth RE is corresponding is R ' _j;

The product of the arithmetic square root of the power factor of each RE during calculating i=n in a described i RE, described modulation symbol and described channel estimation value, and using result as the sub-interference signal after reconstruct corresponding to each RE, then the sub-interference signal after the reconstruct of a described jth RE is:

${R^{\′}}_j=\sqrt{P}*{H^{\′}}_j*d_j;$

The described interference signal after reconstruct is calculated according to the sub-interference signal after the reconstruct that each RE in a described i RE is corresponding.

In conjunction with the possible implementation of first aspect, the first possible implementation of first aspect, the second, the third possible implementation, the 4th kind of possible implementation, the 5th kind of possible implementation or the 6th kind of possible implementation, in the 7th kind of possible implementation

Described the interference signal detected from Received signal strength is carried out modulation /demodulation, calculate one or more modulation symbol, and before each modulation symbol described being mapped on corresponding resource element RE, also comprise: obtain Received signal strength, described Received signal strength comprises service signal and interference signal;

Described according to after the described interference signal after described modulation symbol, described channel estimation value and described power factor calculating reconstruct, also comprise: the difference of the described interference signal after calculating described Received signal strength and reconstructing, and using result as the Received signal strength after interference elimination.

In conjunction with the possible implementation of first aspect, the first possible implementation of first aspect, the second, the third possible implementation, the 4th kind of possible implementation, the 5th kind of possible implementation, the 6th kind of possible implementation or the 7th kind of possible implementation, in the 8th kind of possible implementation

Described interference signal is at least one in the signal that carries of the signal that carries of signal, paging Paging that signal, Physical Broadcast Channel PBCH that signal, physical downlink control channel PDCCH that the physical control form indicating channel PCFICH of interfered cell carries are carried carry and the first system block of information SIB1;

Described channel estimation value is any one in cell specific reference signal CRS channel estimation value, main synchronizing sequence PSS channel estimation value and secondary synchronization sequences SSS channel estimation value.

Second aspect, provides a kind of terminal, and described terminal comprises:

First computing module, carries out modulation /demodulation for the interference signal will detected from Received signal strength, calculates one or more modulation symbol, and is mapped to by each modulation symbol described on corresponding resource element RE;

Second computing module, for calculating described interference signal channel estimation value corresponding on described RE;

3rd computing module, for according to described Received signal strength, described modulation symbol and the described channel estimation value rated output factor, described power factor is the signal power of described interference signal on each RE and the ratio of pilot power;

4th computing module, for calculating the interference signal after reconstruct according to described modulation symbol, described channel estimation value and described power factor.

In the first possible implementation of second aspect, described 3rd computing module, comprising:

First computing unit, for calculating the Received signal strength component of described Received signal strength on all or part of RE;

Deformation unit, for obtaining the described Received signal strength component on each RE in described all or part of RE, described modulation symbol and described channel estimation value by formula distortion and residual term and form, described m is constant;

Second computing unit, for calculating described power factor.

In conjunction with the first implementation in the cards of second aspect, in the implementation that the second is possible, described deformation unit, comprising:

First setting subelement, for setting the number of the described modulation symbol calculated as n, described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

First distortion subelement, for the described Received signal strength component on each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the arithmetic square root of power factor and residual term and form, then the expression formula after the RE distortion of described jth is:

Second distortion subelement, for the both sides of the expression formula after the distortion of each RE in a described i RE being added respectively rear square, that is:

Wherein, d _j ^*represent d _jconjugation, m=1.

In conjunction with the implementation that the second of second aspect is possible, in the implementation that the third is possible, described second computing unit, comprising:

First computation subunit, calculates described power factor for the expression formula being added rear square according to the both sides of the expression formula after RE distortion each in a described i RE respectively, that is:

$P=\frac{{(\frac{R_1*{d_1}^{*}}{{H^{\′}}_1}+\frac{R_2*{d_2}^{*}}{{H^{\′}}_2}+...+\frac{R_i*{d_i}^{*}}{{H^{\′}}_i})}^2}{i^2}.$

In conjunction with the first possible implementation of second aspect, in the 4th kind of possible implementation, described deformation unit, comprising:

First setting subelement, for setting the number of the described modulation symbol calculated as n, described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

3rd distortion subelement, for the described channel estimation value normalization by each RE in a described i RE, then the described channel estimation value after the normalization of a described jth RE is:

$\frac{{H^{\′}}_j}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}};$

4th distortion subelement, for the described Received signal strength component of each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the product of the described channel estimation value after the arithmetic square root of described power factor, described channel estimation value and normalization and residual term and form, then the expression formula after the distortion of a described jth RE is:

5th distortion subelement, for the both sides of the expression formula after the distortion of each RE in a described i RE being added respectively rear square, namely

Wherein, d _j ^*represent d _jconjugation,

In conjunction with the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation, described second computing unit, comprising:

Second computation subunit, calculates described power factor for the expression formula being added rear square according to the both sides of the expression formula after RE distortion each in a described i RE respectively, that is:

$P=\frac{{(R_1*{d_1}^{*}*\frac{{H^{\′}}_1}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+R_2*{d_2}^{*}*\frac{{H^{\′}}_2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+...+R_i*{d_i}^{*}*\frac{{H^{\′}}_i}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}})}^2}{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}.$

In conjunction with the third possible implementation of second aspect or the 5th kind of possible implementation of second aspect, in the 6th kind of possible implementation, described 4th computing module, comprising:

Second setup unit, for setting the sub-interference signal after reconstruct that a described jth RE is corresponding as R ' _j;

3rd computation subunit, the product of the arithmetic square root of the power factor of each RE during for calculating i=n in a described i RE, described modulation symbol and described channel estimation value, and using result as the sub-interference signal after reconstruct corresponding to each RE, then the sub-interference signal after the reconstruct of a described jth RE is:

${R^{\′}}_j=\sqrt{P}*{H^{\′}}_j*d_j;$

4th computation subunit, for calculating the described interference signal after reconstruct according to the sub-interference signal after reconstruct corresponding to each RE in a described i RE.

In conjunction with the possible implementation of second aspect, the first possible implementation of second aspect, the second, the third possible implementation, the 4th kind of possible implementation, the 5th kind of possible implementation or the 6th kind of possible implementation, in the 7th kind of possible implementation, described terminal also comprises:

Signal acquisition module, for obtaining Received signal strength, described Received signal strength comprises service signal and interference signal;

5th computing module, for calculating the difference of the described interference signal after described Received signal strength and reconstruct, and using result as the Received signal strength after interference elimination.

In conjunction with the possible implementation of second aspect, the first possible implementation of second aspect, the second, the third possible implementation, the 4th kind of possible implementation, the 5th kind of possible implementation, the 6th kind of possible implementation or the 7th kind of possible implementation, in the 8th kind of possible implementation

Described interference signal is at least one in the signal that carries of the signal that carries of signal, paging Paging that signal, Physical Broadcast Channel PBCH that signal, physical downlink control channel PDCCH that the physical control form indicating channel PCFICH of interfered cell carries are carried carry and the first system block of information SIB1;

Described channel estimation value is any one in cell specific reference signal CRS channel estimation value, main synchronizing sequence PSS channel estimation value and secondary synchronization sequences SSS channel estimation value.

The third aspect, provides a kind of terminal, and described terminal comprises:

Processor, carries out modulation /demodulation for the interference signal will detected from Received signal strength, calculates one or more modulation symbol, and is mapped to by each modulation symbol described on corresponding resource element RE; Calculate the channel estimation value that described interference signal is corresponding on described RE; According to described Received signal strength, described modulation symbol and the described channel estimation value rated output factor, described power factor is the signal power of described interference signal on each RE and the ratio of pilot power; The described interference signal after reconstruct is calculated according to described modulation symbol, described channel estimation value and described power factor; The difference of the described interference signal after calculating described Received signal strength and reconstructing, and using result as the Received signal strength after interference elimination.

The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:

By calculating the modulation symbol of eliminable interference signal in interference signal and the channel estimation value on each RE of modulation symbol mapping, and according to the Received signal strength component on all or part of RE, modulation symbol and channel estimation value calculate the signal power of interference signal and the ratio of pilot power and power factor on each RE, thus accurately calculate the interference signal after reconstruct according to power factor and modulation symbol and channel estimation value, solve the inaccurate problem of interference signal after the reconstruct calculated in prior art, reach the effect of the interference signal after accurately calculating reconstruct.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the method flow diagram of the interference signal reconstructing method that the embodiment of the present invention one provides;

Fig. 2 is the method flow diagram of the interference signal reconstructing method that the embodiment of the present invention two provides;

Fig. 3 is the method flow diagram of the interference signal reconstructing method that the embodiment of the present invention three provides;

Fig. 4 is the block diagram of the terminal that the embodiment of the present invention four provides;

Fig. 5 is the block diagram of the 3rd computing module that the embodiment of the present invention four provides;

Fig. 6 is the block diagram of the deformation unit that the embodiment of the present invention four provides;

Fig. 7 is another block diagram of the 3rd computing module that the embodiment of the present invention four provides;

Fig. 8 is another block diagram of the deformation unit that the embodiment of the present invention four provides;

Fig. 9 is a block diagram again of the 3rd computing module that the embodiment of the present invention four provides;

Figure 10 is the block diagram of the 4th computing module that the embodiment of the present invention four provides;

Figure 11 is a block diagram again of the terminal that the embodiment of the present invention four provides;

Figure 12 is the block diagram of the terminal that the embodiment of the present invention five provides.

Embodiment

For making effect of the present invention, technical scheme and advantage clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.

For convenience of description, first the reconstruct of the interference signal in this patent is described in detail.Conveniently analyze herein, suppose only there is an interfered cell, and with UE(User equipment, equipment) in a RE(Resource Element, resource element) be example.Suppose that the transmitting power of this interfered cell on this RE is P _{iner_REG}, channel response is H _inter, modulation symbol is d _inter, and the transmitting power of Serving cell on this RE is P _serv, channel response is H _serv, modulation symbol is d _inter, then the Received signal strength component of the UE on corresponding RE can be expressed as:

$R=\sqrt{P_{\mathrm{serv}}}{H}_{\mathrm{serv}}{d}_{\mathrm{serv}}+\sqrt{P_{\mathrm{inter}\_\mathrm{REG}}}{H}_{\mathrm{inter}}{d}_{\mathrm{inter}}+N;$

It can thus be appreciated that the Received signal strength component on each RE comprises service signal interference signal with deviation N tri-part, thus in order to accurately calculate the Received signal strength component on each RE reconstruct after interference signal, just must accurately estimate h _interand d _inter.

In the prior art, H _interestimator can by channel estimating as CRS(common referencesignal, community special reference signal) channel estimating obtains, that is, if the transmitting power of CRS frequency pilot sign is h then after channel estimating _intervalue can be expressed as:

${H^{\′}}_{\mathrm{inter}\_\mathrm{CRS}}=\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}}}(H_{\mathrm{inter}}+\mathrm{\σ})$

Wherein, σ is the channel estimation value after normalization;

And d _intercan obtain by carrying out modulation /demodulation to interference signal, such as, if interference signal is PCFICH(Physical control format indicator channel, physical control form indicating channel) signal that carries, then get Received signal strength at UE and carry out after detection obtains interference signal to received signal, the CFI(control format Indicatior of the 2bits that PCFICH can be carried, control format indicates) binary bit stream of 32bits is converted to by decoding, thus according to QPSK(Quadrature Phase ShiftKeying, quarternary phase-shift keying (QPSK) signal) modulation system, modulation /demodulation is carried out to the binary bit stream of 32bits and obtains 16 modulation symbols, 16 modulation symbols are mapped on 16 RE respectively simultaneously,

In sum, in order to accurately calculate the interference signal after reconstruct, namely the transmitting power of interfered cell on this RE accurately must be estimated but, owing to carrying the transmitting power of frequency pilot sign in channel estimation value so also namely accurately calculate this is also emphasis herein, and its concrete implementation please refer to following embodiment.

Embodiment one

Please refer to Fig. 1, it illustrates the method flow diagram of the interference signal reconstructing method that the embodiment of the present invention one provides, this interference signal reconstructing method comprises:

Step 101, carries out modulation /demodulation by the interference signal detected from Received signal strength, calculates one or more modulation symbol, and is mapped to by each modulation symbol on corresponding resource element RE;

UE is when carrying out transfer of data, the Received signal strength from base station can be got, and due to the interference signal of the service signal and interfered cell that comprise Serving cell in Received signal strength, so after UE detects to received signal, the interference signal in Received signal strength can be known, thus UE to received signal in interference signal carry out modulation /demodulation, calculate one or more modulation symbol.And after UE calculates modulation symbol, the modulation symbol calculated is mapped on one or more RE respectively.Such as, UE to received signal in interference signal when carrying out modulation /demodulation, obtain " 8 " individual modulation symbol, then individual to " 8 " modulation symbol is mapped on 8 RE by UE respectively, thus obtains modulation symbol corresponding on " 8 " individual RE.

Step 102, calculates the channel estimation value that interference signal is corresponding on RE;

UE, after getting Received signal strength, can carry out channel estimating to received signal, thus obtain the channel estimation value of Received signal strength.But, owing to including service signal and interference signal in Received signal strength, so UE can calculate channel estimation value corresponding on one or more RE that interference signal maps at modulation symbol.

Step 103, according to Received signal strength, modulation symbol and the channel estimation value rated output factor, power factor is the signal power of interference signal on each RE and the ratio of pilot power;

After UE gets Received signal strength, UE also will carry out modulation /demodulation to received signal, thus obtain the Received signal strength component on each RE of modulation symbol mapping.And calculate the channel estimation value on each RE of modulation symbol and modulation symbol mapping at UE after, UE is obtained Received signal strength component, modulation symbol and the channel estimation value on each RE by formula distortion and residual term and form, thus calculate the value of power factor.Wherein, power factor is the signal power of interference signal on each RE and the ratio of pilot power, and m is constant.

Step 104, calculates the interference signal after reconstruct according to modulation symbol, channel estimation value and power factor.

After UE calculates power factor, by the power factor of calculating on each RE and the product of modulation symbol and channel estimation value, and using result of calculation as the sub-interference signal after the reconstruct on each RE.Simultaneously UE by the sub-interference signal after the reconstruct that each RE calculates according to predetermined computation mode as tired and calculate the interference signal after reconstruct.

In sum, the reconstruct interference signal method that the present embodiment provides, by calculating the modulation symbol of eliminable interference signal in interference signal and the channel estimation value on each RE of modulation symbol mapping, and according to the Received signal strength component on all or part of RE, modulation symbol and channel estimation value calculate the signal power of interference signal and the ratio of pilot power and power factor on each RE, thus accurately calculate the interference signal after reconstruct according to power factor and modulation symbol and channel estimation value, solve the inaccurate problem of interference signal after the reconstruct calculated in prior art, reach the effect of the interference signal after accurately calculating reconstruct.

Embodiment two

Please refer to Fig. 2, it illustrates the method flow diagram of the interference signal reconstructing method that the embodiment of the present invention two provides, this interference signal reconstructing method comprises:

Step 201, obtain Received signal strength, Received signal strength comprises service signal and interference signal;

In the heterogeneous network of lte-a system, owing to there is a lot of low power nodes near macro base station, and these low power nodes and macro base station share same frequency range.So when low power nodes sends service signal to the UE in the coverage in low power nodes and macro base station, UE can receive the very strong co-channel interference from macro base station, and the signal that the common signal channel that the interference signal that can be eliminated in the co-channel interference that these are very strong is macro base station carries, that is, the interference signal that can be eliminated is the signal that PCFICH carries, PDCCH(Physical downlink control channel, Physical Downlink Control Channel) signal that carries, PBCH(Physical broadcast channel, Physical Broadcast Channel) signal that carries, Paging(paging) signal that carries and SIB1(System Information Block1, the first system block of information) at least one in the signal that carries.In the present embodiment, the signal only having PCFICH to carry for interference signal.

Step 202, carries out modulation /demodulation by the interference signal detected from Received signal strength, calculates one or more modulation symbol, and is mapped to by each modulation symbol on corresponding resource element RE;

After UE gets Received signal strength, UE can detect to received signal, thus know in Received signal strength which be low power nodes send service signal, which is the interference signal that adjacent macro base station sends.And UE can carry out modulation /demodulation to the interference signal detected, thus obtains one or more modulation symbol, is mapped to respectively on different RE by the modulation symbol calculated simultaneously.Such as, UE carries out QPSK modulation /demodulation to the interference signal the detected signal that also namely PCFICH carries, then can calculate 16 modulation symbols, and calculate 16 modulation symbols are mapped on 16 RE by UE respectively.

Step 203, calculates the channel estimation value that interference signal is corresponding on RE;

After UE gets Received signal strength, channel estimating can be carried out to received signal.Wherein the method for channel estimating can be that the present embodiment is to carry out the channel estimating based on pilot tone based on any one in the channel estimating of pilot tone, blind estimate and semi-blind estimation.First UE calculates the channel estimation value of Received signal strength in pilot point, then calculates the channel estimation value on one or more RE that Received signal strength maps at each modulation symbol by the method such as interpolation, filtering.Because Received signal strength comprises service signal and interference signal, so UE will obtain the channel estimation value of interference signal on 16 RE.Wherein, channel estimation value can be CRS channel estimation value, PSS(Primary Synchronization Signal, main synchronizing sequence) channel estimation value and SSS(Secondary Synchronization Signal, secondary synchronization sequences) any one in channel estimation value.The present embodiment for the channel estimation value calculated for CRS channel estimation value.

Step 204, is obtained Received signal strength component, modulation symbol and the channel estimation value on each RE in all or part of RE by formula distortion and residual term and form, m is constant;

After UE gets Received signal strength, UE can carry out OFDM(Orthogonal Frequency Division Multiplexing to the Received signal strength obtained, orthogonal frequency division multiplexi) modulation /demodulation, thus high-speed data-flow corresponding for the Received signal strength of acquisition is converted to one or more parallel low rate data streams, also namely can obtain the Received signal strength component on RE that Received signal strength maps at one or more modulation symbol.And Received signal strength component, modulation symbol and the channel estimation value on each RE in all or part of RE is obtained by formula distortion by UE and residual term and form, m is constant, and power factor is the signal power of interference signal on each RE and the ratio of pilot power.Concrete execution step is as follows:

The first, if the number of the modulation symbol calculated is n, all or part of RE is the modulation symbol of a jth RE in i RE, i RE is d _j, channel estimation value is H ' _j, Received signal strength component is R _j, power factor is P, wherein j≤i≤n;

The second, Received signal strength component, modulation symbol and the channel estimation value on each RE in i RE is deformed into the arithmetic square root of power factor and residual term and form, then the expression formula after a jth RE distortion is:

Wherein, d _j ^*for the conjugate of dj, m=1.

Due to when UE carries out modulation /demodulation to interference signal, n modulation symbol can be calculated, and this n modulation symbol is mapped to respectively on n RE, and UE can obtain the channel estimation value of interference signal on n RE by CRS channel estimating, so UE can select i RE wherein, and by formula distortion power factor and residual term obtain to Received signal strength component, channel estimation value and modulation symbol that each RE in i RE calculates and form, wherein, the expression formula after a jth RE distortion is:

(formula 2-1)

Preferably, UE can to Received signal strength component, channel estimation value and modulation symbol that each RE in n RE calculates by formula distortion obtain power factor and residual term and form.

Such as, UE obtains 16 modulation symbols after carrying out QPSK modulation /demodulation to the signal that PCFICH carries, and has been mapped on 16 RE by 16 modulation symbols.UE can select 10 RE in 16 RE, and the conjugate d that the modulation symbol calculating 10 RE is corresponding _j ^*, then by the Received signal strength component of each RE in 10 RE, the conjugation of modulation symbol and channel estimation value, by formula distortion isolate the arithmetic square root of power factor and residual term and form, be implemented as:

$\frac{R*{d_{\mathrm{inter}}}^{*}}{{H^{\′}}_{\mathrm{inter}}}=\frac{(\sqrt{P_{\mathrm{serv}}}{H}_{\mathrm{serv}}{d}_{\mathrm{serv}}+\sqrt{P_{\mathrm{inter}\_\mathrm{REG}}}{H}_{\mathrm{inter}}{d}_{\mathrm{inter}}+N)*{d_{\mathrm{inter}}}^{*}}{{H^{\′}}_{\mathrm{inter}}}$

$=\frac{(\sqrt{P_{\mathrm{serv}}}{H}_{\mathrm{serv}}{d}_{\mathrm{serv}}+\sqrt{P_{\mathrm{inter}\_\mathrm{REG}}}(\frac{{H^{\′}}_{\mathrm{inter}}}{\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}}}}-\mathrm{\σ})d_{\mathrm{inter}}+N)*{d_{\mathrm{inter}}}^{*}}{{H^{\′}}_{\mathrm{inter}}}$

$=\frac{\sqrt{P_{\mathrm{inter}\_\mathrm{REG}}}}{\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}}}}\left(\frac{{H^{\′}}_{\mathrm{inter}}-\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}}}*\mathrm{\σ}}{{H^{\′}}_{\mathrm{inter}}}\right)+\frac{N*{d_{\mathrm{inter}}}^{*}}{{H^{\′}}_{\mathrm{inter}}}+\frac{\left(\sqrt{P_{\mathrm{serv}}}{H}_{\mathrm{serv}}{d}_{\mathrm{serv}}\right)}{{H^{\′}}_{\mathrm{inter}}}*{d_{\mathrm{inter}}}^{*}$

$=\frac{\sqrt{P_{\mathrm{inter}\_\mathrm{REG}}}}{\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}}}}-\frac{\sqrt{P_{\mathrm{inter}\_\mathrm{REG}}}}{\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}}}}\left(\frac{\mathrm{\σ}}{H_{\mathrm{inter}}+\mathrm{\σ}}\right)+\frac{N*{d_{\mathrm{inter}}}^{*}}{{H^{\′}}_{\mathrm{inter}}}+\frac{\left(\sqrt{P_{\mathrm{serv}}}{H}_{\mathrm{serv}}{d}_{\mathrm{serv}}\right)}{{H^{\′}}_{\mathrm{inter}}}*{d_{\mathrm{inter}}}^{*}$ (formula 2-2)

So the expression formula after each RE distortion in 10 RE calculated is:

$\frac{R_1*{d_{\mathrm{inter}1}}^{*}}{{H^{\′}}_{\mathrm{inter}1}}=\frac{\sqrt{P_{\mathrm{inter}\_\mathrm{REG}1}}}{\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}1}}}-\frac{\sqrt{P_{\mathrm{inter}\_\mathrm{REG}1}}}{\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}1}}}\left(\frac{{\mathrm{\σ}}_1}{H_{\mathrm{inter}1}+{\mathrm{\σ}}_1}\right)+\frac{N_1*{d_{\mathrm{inter}1}}^{*}}{{H^{\′}}_{\mathrm{inter}1}}+\frac{\left(\sqrt{P_{\mathrm{serv}1}}{H}_{\mathrm{serv}1}{d}_{\mathrm{serv}1}\right)}{{H^{\′}}_{\mathrm{inter}1}}*{d_{\mathrm{inter}1}}^{*}$ (formula 2-3)

$\frac{R_2*{d_{\mathrm{inter}2}}^{*}}{{H^{\′}}_{\mathrm{inter}2}}=\frac{\sqrt{P_{\mathrm{inter}\_\mathrm{REG}2}}}{\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}2}}}-\frac{\sqrt{P_{\mathrm{inter}\_\mathrm{REG}2}}}{\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}2}}}\left(\frac{{\mathrm{\σ}}_2}{H_{\mathrm{inter}2}+{\mathrm{\σ}}_2}\right)+\frac{N_2*{d_{\mathrm{inter}2}}^{*}}{{H^{\′}}_{\mathrm{inter}2}}+\frac{\left(\sqrt{P_{\mathrm{serv}2}}{H}_{\mathrm{serv}2}{d}_{\mathrm{serv}2}\right)}{{H^{\′}}_{\mathrm{inter}2}}*{d_{\mathrm{inter}2}}^{*}$ (formula 2-4)

$\begin{array}{c}.\\ .\\ .\end{array}$

$\frac{R_{10}*{d_{\mathrm{inter}10}}^{*}}{{H^{\′}}_{\mathrm{inter}10}}=\frac{\sqrt{P_{\mathrm{inter}\_\mathrm{REG}10}}}{\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}10}}}-\frac{\sqrt{P_{\mathrm{inter}\_\mathrm{REG}10}}}{\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}10}}}\left(\frac{{\mathrm{\σ}}_{10}}{H_{\mathrm{inter}10}+{\mathrm{\σ}}_{10}}\right)+\frac{N_{10}*{d_{\mathrm{inter}10}}^{*}}{{H^{\′}}_{\mathrm{inter}10}}+\frac{\left(\sqrt{P_{\mathrm{serv}10}}{H}_{\mathrm{serv}10}{d}_{\mathrm{serv}10}\right)}{{H^{\′}}_{\mathrm{inter}10}}*{d_{\mathrm{inter}10}}^{*}$ (formula 2-12)

The expression formula of the jth RE also namely in 1O RE is:

(formula 2-13)

3rd, the both sides of the expression formula after distortion on i RE are added rear square respectively, that is:

UE is after being expressed as expression formula (2-1) by the Received signal strength component of each RE in i RE, modulation symbol and channel estimation value, because the signal power of interference signal on each RE is set to identical with the ratio of pilot power by those skilled in the art usually, namely also power factor is identical, square can to obtain afterwards so the both sides that each RE in i RE is out of shape the expression formula obtained are added respectively:

(formula 2-14)

Wherein, the R on the left of expression formula ₁, R ₂... R _ithe Received signal strength component corresponding on i RE for Received signal strength is known, H ' ₁, H ' ₂... H ' _ifor the channel estimation value of the interference signal on i RE obtained by CRS channel estimating, and due to d _j ^*for d _jconjugation, and d ₁, d ₂... d _ibe that after UE carries out QPSK modulation /demodulation to interference signal, the modulation symbol calculated is known quantity, institute with the formula left side is known, and the power factor on the right side of formula and each residual term are unknown quantity.

So after UE is expressed as expression formula (2-1) to the Received signal strength component of each RE in 10 RE, modulation symbol and channel estimation value, the expression formula after the both sides 10 RE being out of shape the expression formula obtained are added square is:

(formula 2-15)

Alternatively, in Practical Calculation process, the value of the power factor on each RE may be incomplete same, so UE can after being deformed into the form of (formula 2-1) by the Received signal strength component of each RE in i RE, modulation symbol and channel estimation value, l in k equal RE of the arithmetic square root of power factor is selected to carry out above-mentioned calculating, wherein, l≤k≤i≤n, the present embodiment does not limit this.

Step 205, rated output factor P;

UE is after calculating expression formula (2-14), and in order to the rated output factor, the present embodiment adopts the method estimated, gives up all residual terms, is also deformed into by formula (2-14):

${(\frac{R_1*{d_1}^{*}}{{H^{\′}}_1}+\frac{R_2*{d_2}^{*}}{{H^{\′}}_2}+...+\frac{R_i*{d_i}^{*}}{{H^{\′}}_i})}^2={(i*\sqrt{P})}^2$ (formula 2-16)

Thus obtain power factor $P=\frac{{(\frac{R_1*{d_1}^{*}}{{H^{\′}}_1}+\frac{R_2*{d_2}^{*}}{{H^{\′}}_2}+...+\frac{R_i*{d_i}^{*}}{{H^{\′}}_i})}^2}{i^2},$ Also, namely as i=10, the power factor calculated is $P=\frac{{(\frac{R_1*{d_1}^{*}}{{H^{\′}}_1}+\frac{R_2*{d_2}^{*}}{{H^{\′}}_2}+...+\frac{R_{10}*{d_{10}}^{*}}{{H^{\′}}_{10}})}^2}{{10}^2}.$

Step 206, the product of the arithmetic square root of power factor of each RE when calculating i=n in i RE, modulation symbol and channel estimation value, and using result as the sub-interference signal after reconstruct corresponding to each RE, then the sub-interference signal after the reconstruct of a jth RE is:

${R^{\′}}_j=\sqrt{P}*{H^{\′}}_j*d_j;$

Suppose that the sub-interference signal after the reconstruct on a jth RE is expressed as R ' by UE _jthen calculate the value of power factor at UE after, can calculate as i=n, the arithmetic square root of the power factor of each RE in i RE and the product of channel estimation value and modulation symbol, and using the result that calculates as the sub-interference signal after reconstruct, so the sub-interference signal after the reconstruct of the jth a calculated RE can be expressed as:

${R^{\′}}_j=\sqrt{P}*{H^{\′}}_j*d_j$ (formula 2-17)

Step 207, calculates the interference signal after reconstruct according to the sub-interference signal after the reconstruct that each RE in i RE is corresponding.

After sub-interference signal after the reconstruct of each RE when UE calculates i=n in i RE, the sub-interference signal after the reconstruct of each RE calculated can be calculated the interference signal after reconstruct by predetermined computation mode.Such as, predetermined computation mode be calculate the tired of the sub-interference signal after each reconstruct and, then the interference signal after the reconstruct calculated $R^{\′}=\sqrt{P}*({H^{\′}}_1*d_1+{H^{\′}}_2*d_2+...+{H^{\′}}_{16}*d_{16}).$

Step 208, the difference of the interference signal after calculating Received signal strength and reconstructing, and using result as the Received signal strength after interference elimination.

After interference signal after UE calculates reconstruct, the Received signal strength of acquisition can be deducted the interference signal after the reconstruct calculated by UE, thus using the result calculated as disturbing the Received signal strength after eliminating.

In sum, the reconstruct interference signal method that the present embodiment provides, by calculating the modulation symbol of eliminable interference signal in interference signal and the channel estimation value on each RE of modulation symbol mapping, and according to the Received signal strength component on all or part of RE, modulation symbol and channel estimation value calculate the signal power of interference signal and the ratio of pilot power and power factor on each RE, thus accurately calculate the interference signal after reconstruct according to power factor and modulation symbol and channel estimation value, solve the inaccurate problem of interference signal after the reconstruct calculated in prior art, reach the effect of the interference signal after accurately calculating reconstruct.

Embodiment three

Please refer to Fig. 3, it illustrates the method flow diagram of the interference signal reconstructing method that the embodiment of the present invention three provides, the difference of the present embodiment and embodiment two is, Received signal strength component, modulation symbol and the channel estimation value on each RE in i RE is being obtained by formula distortion by the present embodiment and residual term and form before, first to the channel estimation value normalization of each RE in i RE, then the Received signal strength component of each RE in i RE, modulation symbol and channel estimation value are deformed into the product of the channel estimation value after the arithmetic square root of power factor, channel estimation value and normalization and residual term and form, power factor is calculated finally by fortran, and accurately calculate the interference signal after reconstruct according to power factor, modulation symbol and channel estimation value, this interference signal reconstructing method comprises:

Step 301, obtain Received signal strength, Received signal strength comprises service signal and interference signal;

Step 302, carries out modulation /demodulation by the interference signal detected from Received signal strength, calculates one or more modulation symbol, and is mapped to by each modulation symbol on corresponding resource element RE;

Step 303, calculates the channel estimation value that interference signal is corresponding on RE;

It should be noted that, the step 301 in the present embodiment is corresponding identical respectively to step 203 with the step 201 in embodiment two to step 303, so will repeat no more in the present embodiment.

Step 304, by Received signal strength, modulation symbol and channel estimation value by formula distortion obtain m* power factor and residual term and form;

After UE gets Received signal strength, UE can carry out OFDM modulation demodulation to the Received signal strength obtained, the high-speed data-flow of acquisition is converted to the low rate data streams that one or more is parallel, thus the Received signal strength component on RE that Received signal strength maps at one or more modulation symbol can be obtained.And Received signal strength component, modulation symbol and the channel estimation value on each RE in all or part of RE is obtained by formula distortion by UE and residual term and form, m is constant, and power factor is the signal power of interference signal on each RE and the ratio of pilot power.Concrete execution step is as follows:

The first, if the number of the modulation symbol calculated is n, all or part of RE is the modulation symbol of a jth RE in i RE, i RE is d _j, channel estimation value is H ' _j, Received signal strength component is R _j, power factor is P, wherein j≤i≤n;

The second, by the channel estimation value normalization of each RE in i RE, then the channel estimation value after the normalization of a jth RE is:

$\frac{{H^{\′}}_j}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}};$

Calculate the channel estimation value of each RE of interference signal in i RE at UE after, first each RE channel estimation value in i RE is normalized.Such as, UE selects 10 RE in 16 RE, and is normalized the channel estimation value of each RE in 10 RE, then UE will calculate the ratio of the arithmetic square root of the quadratic sum of the channel estimation value of each RE and the channel estimation value of 10 RE, that is:

$\frac{{H^{\′}}_1}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_{10}}^2}}$ (formula 3-1)

$\frac{{H^{\′}}_2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_{10}}^2}}$ (formula 3-2)

$\begin{array}{c}.\\ .\\ .\end{array}$

$\frac{{H^{\′}}_{10}}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_{10}}^2}}$ (formula 3-10)

Second, the Received signal strength component of each RE in i RE, modulation symbol and channel estimation value are deformed into the product of the channel estimation value after the arithmetic square root of power factor, channel estimation value and normalization and residual term and form, then the expression formula after the distortion of a jth RE is:

Wherein $m=\frac{{{H^{\′}}_j}^2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}.$

Particularly, after the channel estimation value of UE to each RE in i RE is normalized, UE is by the conjugate d of the modulation symbol of each RE in calculating i RE _j ^*.Then, UE carries out formula distortion to the Received signal strength component of each RE in i RE, the conjugation of modulation symbol and channel estimation value, thus obtain the arithmetic square root of power factor, the product of the channel estimation value after the channel estimation value and normalization of this RE and residual term and form, then the expression formula after a jth RE distortion is:

Such as, UE selects the RE of 10 in 16 RE, and calculate the conjugation of the modulation symbol corresponding to each RE in 10 RE, then, the Received signal strength component of each RE in 10 RE, the conjugation of modulation symbol and channel estimation value are deformed into the arithmetic square root of power factor, the product of the channel estimation value after the channel estimation value and normalization of this RE and residual term and form, be implemented as:

$(\sqrt{P_{\mathrm{serv}}}{H}_{\mathrm{serv}}{d}_{\mathrm{serv}}+\sqrt{P_{\mathrm{inter}\_\mathrm{REG}}}{H}_{\mathrm{inter}}{d}_{\mathrm{inter}}+N)*{d_{\mathrm{inter}}}^{*}\frac{{H^{\′}}_{\mathrm{inter}}}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}$

$=\frac{\sqrt{P_{\mathrm{inter}\_\mathrm{REG}2}}}{\sqrt{P_{\mathrm{inter}\_\mathrm{CRS}2}}}*\frac{{\left|\right|{H^{\′}}_{\mathrm{inter}}\left|\right|}^2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}$

$+(\sqrt{P_{\mathrm{serv}}}{H}_{\mathrm{serv}}{d}_{\mathrm{serv}}-\sqrt{P_{\mathrm{inter}\_\mathrm{REG}}}\mathrm{\σ}{d}_{\mathrm{inter}}+N)*{d_{\mathrm{inter}}}^{*}\frac{{H^{\′}}_{\mathrm{inter}}}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}$ (formula 3-11)

Also namely a jth RE be out of shape after expression formula can be expressed as:

(formula 3-12)

Accordingly, UE is deformed into the form of formula (3-12) respectively the Received signal strength component of each RE in 10 RE, modulation symbol and channel estimation value, that is:

(formula 3-13)

(formula 3-14)

(formula 3-22)

3rd, the both sides of the expression formula after distortion on i RE are added rear square respectively, namely

UE is after being expressed as the form of (formula 3-12) by the Received signal strength component of each RE in i RE, modulation symbol and channel estimation value, the both sides of expression formula corresponding for each RE are added respectively rear square, and because the signal power of interference signal on each RE is set to identical with pilot power by those skilled in the art, so the expression formula after above-mentioned distortion is:

(formula 3-23)

Wherein, the R on the left of the formula of (formula 3-23) ₁, R ₂... R _ifor Received signal strength is known quantity, d at the Received signal strength component of i RE ₁ ^*, d ₂ ^*... d _i ^*be respectively modulation symbol d ₁, d ₂... d _iconjugate, and due to d ₁, d ₂d _ibe the modulation symbol calculated by modulation /demodulation be known, so its conjugate is also known quantity, and H ₁', H ₂' ... H _i' for the channel estimation value of the interference signal on i RE be also that known quantity institute is known quantity in left side with the formula; And on the right side of formula be unknown quantity with each residual term.

So after the Received signal strength component of 10 RE selected, modulation symbol and channel estimation value are expressed as formula (3-13) to (3-22) by UE, expression formula formula both sides being added respectively rear square is:

(formula 3-24)

Alternatively, in Practical Calculation process, the value of the power factor on each RE may be incomplete same, so UE can after being deformed into the form of (formula 2-1) by the Received signal strength component of each RE in i RE, modulation symbol and channel estimation value, l in k equal RE of the arithmetic square root of power factor is selected to carry out above-mentioned calculating, wherein, l≤k≤i≤n, the present embodiment does not limit this.

Step 305, the rated output factor;

UE after calculating (formula 3-23), because the left side of formula is known quantity, and on the right side of formula unknown quantity is, the method rated output factor of the present embodiment by estimating with residual term so give up residual term, be also that (formula 3-23) is deformed into:

${(R_1*{d_1}^{*}*\frac{{H^{\′}}_1}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+R_2*{d_2}^{*}*\frac{{H^{\′}}_2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+...+R_i*{d_i}^{*}*\frac{{H^{\′}}_i}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}})}^2$

$={(\sqrt{P}*\frac{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+..+{{H^{\′}}_i}^2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}})}^2$ (formula 3-25)

So the power factor P calculated according to (formula 3-25) is expressed as follows:

$P=\frac{{(R_1*{d_1}^{*}*\frac{{H^{\′}}_1}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+R_2*{d_2}^{*}*\frac{{H^{\′}}_2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+...+R_i*{d_i}^{*}*\frac{{H^{\′}}_i}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}})}^2}{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}.$ Also be

When 10 RE in selection 16 RE calculate, then power factor can be obtained

$P=\frac{{(R_1*{d_1}^{*}*\frac{{H^{\′}}_1}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_{10}}^2}}+R_2*{d_2}^{*}*\frac{{H^{\′}}_2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_{10}}^2}}+...+R_i*{d_i}^{*}*\frac{{H^{\′}}_{10}}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_{10}}^2}})}^2}{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_{10}}^2}.$

Step 306, the product of the arithmetic square root of power factor of each RE when calculating i=n in i RE, modulation symbol and channel estimation value, and using result as the sub-interference signal after reconstruct corresponding to each RE, then the sub-interference signal after the reconstruct of a jth RE is:

${R^{\′}}_j=\sqrt{P}*{H^{\′}}_j*d_j;$

Suppose that the sub-interference signal after the reconstruct on a jth RE is expressed as R ' by UE _jthen calculate the value of power factor at UE after, can calculate as i=n, the arithmetic square root of the power factor of each RE in i RE and the product of channel estimation value and modulation symbol, and using the result that calculates as the sub-interference signal after reconstruct, so the sub-interference signal after the reconstruct of the jth a calculated RE can be expressed as:

${R^{\′}}_j=\sqrt{P}*{H^{\′}}_j+d_j=\frac{{(R_1*{d_1}^{*}*\frac{{H^{\′}}_1}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+R_2*{d_2}^{*}*\frac{{H^{\′}}_2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+...+R_i*{d_i}^{*}*\frac{{H^{\′}}_i}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}})}^2}{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}*{H^{\′}}_j*d_j$

Step 307, calculates the interference signal after reconstruct according to the sub-interference signal after the reconstruct that each RE in i RE is corresponding;

After sub-interference signal after the reconstruct of each RE when UE calculates i=n in i RE, the sub-interference signal after the reconstruct of each RE calculated can be calculated the interference signal after reconstruct by predetermined computation mode.Such as, predetermined computation mode be the tired of sub-interference signal after each reconstruct and, then the interference signal after the reconstruct calculated $R^{\′}=\sqrt{P}*({H^{\′}}_1*d_1+{H^{\′}}_2*d_2+...+{H^{\′}}_{16}*d_{16}).$

Step 308, the difference of the interference signal after calculating Received signal strength and reconstructing, and using result as the Received signal strength after interference elimination.

After interference signal after UE calculates reconstruct, the Received signal strength of acquisition can be deducted the interference signal after the reconstruct calculated by UE, thus using the result calculated as disturbing the Received signal strength after eliminating.

In sum, the interference signal reconstructing method that the present embodiment provides, by calculating the modulation symbol of eliminable interference signal in interference signal and the channel estimation value on each RE of modulation symbol mapping, and according to the Received signal strength component on all or part of RE, modulation symbol and channel estimation value calculate the signal power of interference signal and the ratio of pilot power and power factor on each RE, thus accurately calculate the interference signal after reconstruct according to power factor and modulation symbol and channel estimation value, solve the inaccurate problem of interference signal after the reconstruct calculated in prior art, reach the effect of the interference signal after accurately calculating reconstruct.

Embodiment four

Please refer to Fig. 4, it illustrates the block diagram of the terminal that the embodiment of the present invention four provides, this terminal comprises:

First computing module 420, carries out modulation /demodulation for the interference signal will detected from Received signal strength, calculates one or more modulation symbol, and is mapped to by each modulation symbol described on corresponding resource element RE;

Second computing module 430, for calculating described interference signal channel estimation value corresponding on described RE;

3rd computing module 440, for according to described Received signal strength, described modulation symbol and the described channel estimation value rated output factor, described power factor is the signal power of described interference signal on each RE and the ratio of pilot power;

4th computing module 450, for calculating the interference signal after reconstruct according to described modulation symbol, described channel estimation value and described power factor.

Please refer to Fig. 5, in the first implementation of the present embodiment, described 3rd computing module 440 comprises:

First computing unit 442, for calculating the Received signal strength component of described Received signal strength on all or part of RE;

Deformation unit 444, for obtaining the described Received signal strength component on each RE in described all or part of RE, described modulation symbol and described channel estimation value by formula distortion and residual term and form, described m is constant;

Second computing unit 446, for calculating described power factor.

Please refer to Fig. 6, in the second implementation of the present embodiment, described deformation unit 444 comprises:

First setting subelement 510, for setting the number of the described modulation symbol calculated as n, described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

First distortion subelement 520, for the described Received signal strength component on each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the arithmetic square root of power factor and residual term and form, then the expression formula after the RE distortion of described jth is:

Second distortion subelement 530, for the both sides of the expression formula after the distortion of each RE in a described i RE being added respectively rear square, that is:

Wherein, d _j ^*represent d _jconjugation, m=1.

Please refer to Fig. 7, in the third implementation of the present embodiment, described second computing unit 446 comprises:

First computation subunit 610, calculates described power factor for the expression formula being added rear square according to the both sides of the expression formula after RE distortion each in a described i RE respectively, that is:

$P=\frac{{(\frac{R_1*{d_1}^{*}}{{H^{\′}}_1}+\frac{R_2*{d_2}^{*}}{{H^{\′}}_2}+...+\frac{R_i*{d_i}^{*}}{{H^{\′}}_i})}^2}{i^2}.$

Or please refer to Fig. 8, in the 4th kind of implementation of the present embodiment, described deformation unit 444 comprises:

First setting subelement 510, for setting the number of the described modulation symbol calculated as n, described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

3rd distortion subelement 540, for the described channel estimation value normalization by each RE in a described i RE, then the described channel estimation value after the normalization of a described jth RE is:

$\frac{{H^{\′}}_j}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}};$

4th distortion subelement 550, for the described Received signal strength component of each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the product of the described channel estimation value after the arithmetic square root of described power factor, described channel estimation value and normalization and residual term and form, then the expression formula after the distortion of a described jth RE is:

5th distortion subelement 560, for the both sides of the expression formula after the distortion of each RE in a described i RE being added respectively rear square, namely

Wherein, d _j ^*represent d _jconjugation,

Please refer to Fig. 9, in the 5th kind of implementation of the present embodiment, described second computing unit 446 comprises:

Second computation subunit 620, calculates described power factor for the expression formula being added rear square according to the both sides of the expression formula after RE distortion each in a described i RE respectively, that is:

$P=\frac{{(R_1*{d_1}^{*}*\frac{{H^{\′}}_1}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+R_2*{d_2}^{*}*\frac{{H^{\′}}_2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+...+R_i*{d_i}^{*}*\frac{{H^{\′}}_i}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}})}^2}{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}.$

Please refer to Figure 10, in the 6th kind of implementation of the present embodiment, described 4th computing module 450 comprises:

Second setup unit 710, for setting the sub-interference signal after reconstruct that a described jth RE is corresponding as R ' _j;

3rd computation subunit 720, the product of the arithmetic square root of the power factor of each RE during for calculating i=n in a described i RE, described modulation symbol and described channel estimation value, and using result as the sub-interference signal after reconstruct corresponding to each RE, then the sub-interference signal after the reconstruct of a described jth RE is:

${R^{\′}}_j=\sqrt{P}*{H^{\′}}_j*d_j;$

4th computation subunit 730, for calculating the described interference signal after reconstruct according to the sub-interference signal after reconstruct corresponding to each RE in a described i RE.

Please refer to Figure 12, in the 7th kind of implementation of the present embodiment, described terminal also comprises:

Signal acquisition module 410, for obtaining Received signal strength, described Received signal strength comprises service signal and interference signal;

5th computing module 460, for calculating the difference of the described interference signal after described Received signal strength and reconstruct, and using result as the Received signal strength after interference elimination.

In the 8th kind of implementation of the present embodiment, described interference signal is at least one in the signal that carries of the signal that carries of signal, paging Paging that signal, Physical Broadcast Channel PBCH that signal, physical downlink control channel PDCCH that the physical control form indicating channel PCFICH of interfered cell carries are carried carry and the first system block of information SIB1;

Described channel estimation value is any one in cell specific reference signal CRS channel estimation value, main synchronizing sequence PSS channel estimation value and secondary synchronization sequences SSS channel estimation value.

In sum, the terminal that the present embodiment provides, by calculating the modulation symbol of eliminable interference signal in interference signal and the channel estimation value on each RE of modulation symbol mapping, and according to the Received signal strength component on all or part of RE, modulation symbol and channel estimation value calculate the signal power of interference signal and the ratio of pilot power and power factor on each RE, thus accurately calculate the interference signal after reconstruct according to power factor and modulation symbol and channel estimation value, solve the inaccurate problem of interference signal after the reconstruct calculated in prior art, reach the effect of the interference signal after accurately calculating reconstruct.

Embodiment five

Present embodiments provide a kind of terminal, described terminal comprises:

Processor 820, carries out modulation /demodulation for the interference signal will detected from Received signal strength, calculates one or more modulation symbol, and is mapped to by each modulation symbol described on corresponding resource element RE; Calculate the channel estimation value that described interference signal is corresponding on described RE; According to described Received signal strength, described modulation symbol and the described channel estimation value rated output factor, described power factor is the signal power of described interference signal on each RE and the ratio of pilot power; The described interference signal after reconstruct is calculated according to described modulation symbol, described channel estimation value and described power factor.

In the first implementation of the present embodiment,

Described processor 820 is also for calculating the Received signal strength component of described Received signal strength on all or part of RE; Described Received signal strength component on each RE in described all or part of RE, described modulation symbol and described channel estimation value are obtained by formula distortion and residual term and form, described m is constant; Calculate described power factor.

In the second implementation of the present embodiment,

Described processor 820 is also for setting the number of the described modulation symbol calculated as n, and described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

Described Received signal strength component on each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the arithmetic square root of power factor and residual term and form, then the expression formula after the RE distortion of described jth is:

The both sides of the expression formula after the distortion of each RE in a described i RE are added respectively rear square, that is:

Wherein, d _j ^*represent d _jconjugation, m=1.

In the third implementation of the present embodiment,

The expression formula of described processor 820 also for being added rear square respectively according to the both sides of the expression formula after RE distortion each in a described i RE calculates described power factor, that is:

$P=\frac{{(\frac{R_1*{d_1}^{*}}{{H^{\′}}_1}+\frac{R_2*{d_2}^{*}}{{H^{\′}}_2}+...+\frac{R_i*{d_i}^{*}}{{H^{\′}}_i})}^2}{i^2}.$

In the 4th kind of implementation of the present embodiment,

Described processor 820 is also for setting the number of the described modulation symbol calculated as n, and described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

By the described channel estimation value normalization of each RE in a described i RE, then the described channel estimation value after the normalization of a described jth RE is:

$\frac{{H^{\′}}_j}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}};$

The described Received signal strength component of each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the product of the described channel estimation value after the arithmetic square root of described power factor, described channel estimation value and normalization and residual term and form, then the expression formula after the distortion of a described jth RE is:

The both sides of the expression formula after the distortion of each RE in a described i RE are added respectively rear square, namely

Wherein, d _j ^*represent d _jconjugation,

In the 5th kind of implementation of the present embodiment,

The expression formula of described processor 820 also for being added rear square respectively according to the both sides of the expression formula after RE distortion each in a described i RE calculates described power factor, that is:

$P=\frac{{(R_1*{d_1}^{*}*\frac{{H^{\′}}_1}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+R_2*{d_2}^{*}*\frac{{H^{\′}}_2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+...+R_i*{d_i}^{*}*\frac{{H^{\′}}_i}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}})}^2}{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}.$

In the 6th kind of implementation of the present embodiment,

Described processor 820 is also for setting the sub-interference signal after reconstruct that a described jth RE is corresponding as R ' _j;

The product of the arithmetic square root of the power factor of each RE during calculating i=n in a described i RE, described modulation symbol and described channel estimation value, and using result as the sub-interference signal after reconstruct corresponding to each RE, then the sub-interference signal after the reconstruct of a described jth RE is:

${R^{\′}}_j=\sqrt{P}*{H^{\′}}_j*d_j;$

The described interference signal after reconstruct is calculated according to the sub-interference signal after the reconstruct that each RE in a described i RE is corresponding.

Please refer to Figure 12, in the 7th kind of implementation of the present embodiment, described terminal also comprises:

Receiver 810, for obtaining Received signal strength, described Received signal strength comprises service signal and interference signal;

Processor 820 also for calculating the difference of described interference signal after described Received signal strength and reconstruct, and using result as the Received signal strength after interference is eliminated.

In sum, the terminal that the present embodiment provides, by calculating the modulation symbol of eliminable interference signal in interference signal and the channel estimation value on each RE of modulation symbol mapping, and according to the Received signal strength component on all or part of RE, modulation symbol and channel estimation value calculate the signal power of interference signal and the ratio of pilot power and power factor on each RE, thus accurately calculate the interference signal after reconstruct according to power factor and modulation symbol and channel estimation value, solve the inaccurate problem of interference signal after the reconstruct calculated in prior art, reach the effect of the interference signal after accurately calculating reconstruct.

It should be noted that: the terminal that above-described embodiment provides is when carrying out interference signal reconstruct, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, internal structure by terminal is divided into different functional modules, to complete all or part of function described above.In addition, the terminal that above-described embodiment provides and interference signal reconstructing method embodiment belong to same design, and its specific implementation process refers to embodiment of the method, repeats no more here.

The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.

One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (15)

1. an interference signal reconstructing method, is characterized in that, described method comprises:

The interference signal detected from Received signal strength is carried out modulation /demodulation, calculates one or more modulation symbol, and each modulation symbol described is mapped on corresponding resource element RE;

Calculate the channel estimation value that described interference signal is corresponding on described RE;

According to described Received signal strength, described modulation symbol and the described channel estimation value rated output factor, described power factor is the signal power of described interference signal on each RE and the ratio of pilot power;

The described interference signal after reconstruct is calculated according to described modulation symbol, described channel estimation value and described power factor;

Described according to described Received signal strength, described modulation symbol and the described channel estimation value rated output factor, comprising:

Calculate the Received signal strength component of described Received signal strength on all or part of RE;

Described Received signal strength component on each RE in described all or part of RE, described modulation symbol and described channel estimation value are obtained by formula distortion and residual term and form, described m is constant;

Calculate described power factor;

Described according to the described interference signal after described modulation symbol, described channel estimation value and described power factor calculating reconstruct, comprising:

Calculate the arithmetic square root of described power factor on each RE and the product of described modulation symbol and described channel estimation value; Using result of calculation as the sub-interference signal after the reconstruct on each RE, the sub-interference signal after the described reconstruct that each RE calculates is calculated the interference signal after described reconstruct according to predetermined computation mode.

2. interference signal reconstructing method according to claim 1, is characterized in that, described described Received signal strength component on each RE in described all or part of RE, described modulation symbol and described channel estimation value distortion by formula is obtained and residual term and form, comprising:

If the number of the described modulation symbol calculated is n, described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

Described Received signal strength component on each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the arithmetic square root of power factor and residual term and form, then the expression formula after the RE distortion of described jth is:

The both sides of the expression formula after the distortion of each RE in a described i RE are added respectively rear square, that is:

Wherein, d _j ^*represent d _jconjugation, m=1.

3. interference signal reconstructing method according to claim 2, is characterized in that, the described power factor of described calculating, comprising:

The expression formula being added rear square according to the both sides of the expression formula after RE distortion each in a described i RE respectively calculates described power factor, that is:

$P=\frac{{(\frac{R_1*{d_1}^{*}}{{H^{\′}}_1}+\frac{R_2*{d_2}^{*}}{{H^{\′}}_2}+...+\frac{R_i*{d_i}^{*}}{{H^{\′}}_i})}^2}{i^2}.$

4. interference signal reconstructing method according to claim 1, is characterized in that, described described Received signal strength component on each RE in described all or part of RE, described modulation symbol and described channel estimation value distortion by formula is obtained and residual term and form, comprising:

If the number of the described modulation symbol calculated is n, described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

By the described channel estimation value normalization of each RE in a described i RE, then the described channel estimation value after the normalization of a described jth RE is:

$\frac{{H^{\′}}_j}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}};$

The described Received signal strength component of each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the product of the described channel estimation value after the arithmetic square root of described power factor, described channel estimation value and normalization and residual term and form, then the expression formula after the distortion of a described jth RE is:

The both sides of the expression formula after the distortion of each RE in a described i RE are added respectively rear square, namely

Wherein, d _j ^*represent d _jconjugation, $m=\frac{{H^{\′}}_j}{\sqrt{{H_1}^{\′2}+{H_2}^{\′2}+...+{H_i}^{\′2}}}.$

5. interference signal reconstructing method according to claim 4, is characterized in that, the described power factor of described calculating, comprising:

The expression formula being added rear square according to the both sides of the expression formula after RE distortion each in a described i RE respectively calculates described power factor, that is:

$P=\frac{{(R_1*{d_1}^{*}*\frac{{H^{\′}}_1}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+R_2*{d_2}^{*}*\frac{{H^{\′}}_2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+...+R_i*{d_i}^{*}*\frac{{H^{\′}}_i}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}})}^2}{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}.$

6., according to the arbitrary described interference signal reconstructing method of claim 1 to 5, it is characterized in that,

Described the interference signal detected from Received signal strength is carried out modulation /demodulation, calculates one or more modulation symbol, and before each modulation symbol described being mapped on corresponding resource element RE, also comprise:

Obtain Received signal strength, described Received signal strength comprises service signal and interference signal;

Described according to after the described interference signal after described modulation symbol, described channel estimation value and described power factor calculating reconstruct, also comprise:

The difference of the described interference signal after calculating described Received signal strength and reconstructing, and using result as the Received signal strength after interference elimination.

7., according to the arbitrary described interference signal reconstructing method of claim 1 to 5, it is characterized in that,

Described interference signal is at least one in the signal that carries of the signal that carries of signal, paging Paging that signal, Physical Broadcast Channel PBCH that signal, physical downlink control channel PDCCH that the physical control form indicating channel PCFICH of interfered cell carries are carried carry and the first system block of information SIB1;

Described channel estimation value is any one in cell specific reference signal CRS channel estimation value, main synchronizing sequence PSS channel estimation value and secondary synchronization sequences SSS channel estimation value.

8. a terminal, is characterized in that, described terminal comprises:

First computing module, carries out modulation /demodulation for the interference signal will detected from Received signal strength, calculates one or more modulation symbol, and is mapped to by each modulation symbol described on corresponding resource element RE;

Second computing module, for calculating described interference signal channel estimation value corresponding on described RE;

3rd computing module, for according to described Received signal strength, described modulation symbol and the described channel estimation value rated output factor, described power factor is the signal power of described interference signal on each RE and the ratio of pilot power;

4th computing module, for calculating the interference signal after reconstruct according to described modulation symbol, described channel estimation value and described power factor;

Described 3rd computing module, comprising:

First computing unit, for calculating the Received signal strength component of described Received signal strength on all or part of RE;

Deformation unit, for obtaining the described Received signal strength component on each RE in described all or part of RE, described modulation symbol and described channel estimation value by formula distortion and residual term and form, described m is constant;

Second computing unit, for calculating described power factor;

Described 4th computing module, also for the product of the arithmetic square root and described modulation symbol and described channel estimation value that calculate the described power factor on each RE; Using result of calculation as the sub-interference signal after the reconstruct on each RE, the sub-interference signal after the described reconstruct that each RE calculates is calculated the interference signal after described reconstruct according to predetermined computation mode.

9. terminal according to claim 8, is characterized in that, described deformation unit, comprising:

First setting subelement, for setting the number of the described modulation symbol calculated as n, described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

First distortion subelement, for the described Received signal strength component on each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the arithmetic square root of power factor and residual term and form, then the expression formula after the RE distortion of described jth is:

Second distortion subelement, for the both sides of the expression formula after the distortion of each RE in a described i RE being added respectively rear square, that is:

Wherein, d _j ^*represent d _jconjugation, m=1.

10. terminal according to claim 9, is characterized in that, described second computing unit, comprising:

First computation subunit, calculates described power factor for the expression formula being added rear square according to the both sides of the expression formula after RE distortion each in a described i RE respectively, that is:

$P=\frac{{(\frac{R_1*{d_1}^{*}}{{H^{\′}}_1}+\frac{R_2*{d_2}^{*}}{{H^{\′}}_2}+...+\frac{R_i*{d_i}^{*}}{{H^{\′}}_i})}^2}{i^2}.$

11. terminals according to claim 8, is characterized in that, described deformation unit, comprising:

First setting subelement, for setting the number of the described modulation symbol calculated as n, described all or part of RE is the described modulation symbol of a jth RE in i RE, a described i RE is d _j, described channel estimation value is H ' _j, described Received signal strength component is R _j, described power factor is P, wherein j≤i≤n;

3rd distortion subelement, for the described channel estimation value normalization by each RE in a described i RE, then the described channel estimation value after the normalization of a described jth RE is:

$\frac{{H^{\′}}_j}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}};$

4th distortion subelement, for the described Received signal strength component of each RE in a described i RE, described modulation symbol and described channel estimation value are deformed into the product of the described channel estimation value after the arithmetic square root of described power factor, described channel estimation value and normalization and residual term and form, then the expression formula after the distortion of a described jth RE is:

5th distortion subelement, for the both sides of the expression formula after the distortion of each RE in a described i RE being added respectively rear square, namely

Wherein, d _j ^*represent d _jconjugation, $m=\frac{{H^{\′}}_j}{\sqrt{{H_1}^{\′2}+{H_2}^{\′2}+...+{H_i}^{\′2}}}.$

12. terminals according to claim 11, is characterized in that, described second computing unit, comprising:

Second computation subunit, calculates described power factor for the expression formula being added rear square according to the both sides of the expression formula after RE distortion each in a described i RE respectively, that is:

$P=\frac{{(R_1*{d_1}^{*}*\frac{{H^{\′}}_1}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+R_2*{d_2}^{*}*\frac{{H^{\′}}_2}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}}+...+R_i*{d_i}^{*}*\frac{{H^{\′}}_i}{\sqrt{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}})}^2}{{{H^{\′}}_1}^2+{{H^{\′}}_2}^2+...+{{H^{\′}}_i}^2}.$

Terminal described in 13. according to Claim 8 to 12 are arbitrary, it is characterized in that, described terminal also comprises:

Signal acquisition module, for obtaining Received signal strength, described Received signal strength comprises service signal and interference signal;

5th computing module, for calculating the difference of the described interference signal after described Received signal strength and reconstruct, and using result as the Received signal strength after interference elimination.

Terminal described in 14. according to Claim 8 to 12 are arbitrary, is characterized in that,

Described interference signal is at least one in the signal that carries of the signal that carries of signal, paging Paging that signal, Physical Broadcast Channel PBCH that signal, physical downlink control channel PDCCH that the physical control form indicating channel PCFICH of interfered cell carries are carried carry and the first system block of information SIB1;

Described channel estimation value is any one in cell specific reference signal CRS channel estimation value, main synchronizing sequence PSS channel estimation value and secondary synchronization sequences SSS channel estimation value.

15. 1 kinds of terminals, is characterized in that, described terminal comprises:

Processor, carries out modulation /demodulation for the interference signal will detected from Received signal strength, calculates one or more modulation symbol, and is mapped to by each modulation symbol described on corresponding resource element RE; Calculate the channel estimation value that described interference signal is corresponding on described RE; According to described Received signal strength, described modulation symbol and the described channel estimation value rated output factor, described power factor is the signal power of described interference signal on each RE and the ratio of pilot power; The described interference signal after reconstruct is calculated according to described modulation symbol, described channel estimation value and described power factor; The difference of the described interference signal after calculating described Received signal strength and reconstructing, and using result as the Received signal strength after interference elimination;

Described according to described Received signal strength, described modulation symbol and the described channel estimation value rated output factor, comprising:

Calculate the Received signal strength component of described Received signal strength on all or part of RE;

Described Received signal strength component on each RE in described all or part of RE, described modulation symbol and described channel estimation value are obtained by formula distortion and residual term and form, described m is constant;

Calculate described power factor;

Described according to the described interference signal after described modulation symbol, described channel estimation value and described power factor calculating reconstruct, comprising:

Calculate the arithmetic square root of described power factor on each RE and the product of described modulation symbol and described channel estimation value; Using result of calculation as the sub-interference signal after the reconstruct on each RE, the sub-interference signal after the described reconstruct that each RE calculates is calculated the interference signal after described reconstruct according to predetermined computation mode.