CN101998595B - Method and device for reducing mutual interference of multiple carriers - Google Patents
Method and device for reducing mutual interference of multiple carriers Download PDFInfo
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- CN101998595B CN101998595B CN200910165247.8A CN200910165247A CN101998595B CN 101998595 B CN101998595 B CN 101998595B CN 200910165247 A CN200910165247 A CN 200910165247A CN 101998595 B CN101998595 B CN 101998595B
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Abstract
The invention discloses a method for reducing mutual interference of multiple carriers, comprising the following steps: adjusting the phase of the modulated signal; modulating the baseband signal to the modulated signal; and judging whether the baseband signal can be correctly demodulated, if not, continuously adjusting the phase of the modulated signal, and if so, taking the current modulated signal as the modulated signal of the baseband signal. The invention simultaneously discloses a device for reducing mutual interference of the multiple carriers. The invention especially obviously improves the performance under the condition of adjacent configuration of multiple carriers, ensures that multiple carriers can simultaneously work in the same wireless signal coverage area and greatly improves the frequency spectrum utilization ratio.
Description
Technical field
The present invention relates to the treatment technology of multicarrier phase mutual interference in communication system, relate in particular to a kind of method and apparatus that reduces the mutual interference of multicarrier phase.
Background technology
Wireless communication system multipotency is supported multicarrier mode of operation at present, and multi-carrier mode refers to and transmits and receives all by the ripple that closes that is multiple single carriers.The for example CDMA2000lx communication system for 800MHz frequency range, the bandwidth of single carrier is 1.23MHz, adjacent carrier centre frequency interval 1.23MHz, so multiple carrier waves when three carrier wave disposed adjacent be exactly for example three 1.23MHz bandwidth an about 3.69MHz of occupied bandwidth of the common composition of single carrier close ripple, the centre frequency of three carrier waves can be set to respectively 871.11MHz, 872.34MHz, 873.57MHz (can be also other frequency).Fig. 1 is code division multiple access (CDMA, CodeDivision Multiple Access) system frequency domain adjacent three carrier waves occur carrier-in-interference schematic diagram, as shown in Figure 1, in figure, the frequency of first carrier wave is 871.11MHz, second carrier frequency point is 872.34MHz, and the frequency of the 3rd carrier wave is 873.57MHz.In multi-carrier mode, there will be the partial information of a carrier wave to be aliased in adjacent carrier wave, occurred the phase mutual interference between multicarrier, particularly evident when carrier wave disposed adjacent.Two shadow regions are the aliasing region of carrier wave as can see from Figure 1, and the partial information of first carrier wave is aliased in second carrier wave, and the partial information in second carrier wave is aliased in first carrier wave simultaneously.Also there is analogue in second carrier wave and the 3rd carrier wave.In a carrier wave aliasing information of another one carrier wave, will become a kind of interference of this partial information and affect the quality of signal.Due to the existence of this interference, probably cannot do correct demodulation to signal at receiving terminal, therefore must reduce the phase mutual interference between this multicarrier, this interference is particularly outstanding on the impact performance of the EV-DO signal in cdma system.Certainly, in the system such as WCDMA and TD-SCDMA, also there is similar multicarrier interference problem.
In the systems such as CDMA, WCDMA and TD-SCDMA, when under multicarrier mode of operation time, in order to ensure the quality of communication, must reduce the impact of the phase mutual interference between multicarrier.Industry there is no the solution to multicarrier phase mutual interference in wireless communication system at present.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and apparatus that reduces the mutual interference of multicarrier phase, can obviously reduce the multicarrier phase mutual interference of adjacent carrier frequency.
For achieving the above object, technical scheme of the present invention is achieved in that
A method that reduces the mutual interference of multicarrier phase, is characterized in that, comprising:
Adjust the phase place of transferred signal;
Baseband signal is modulated on described transferred signal; And
Judge whether correctly to demodulate described baseband signal, can not correctly separate timing, continue to adjust the phase place of described transferred signal, can correctly separate timing, the transferred signal using current transferred signal as described baseband signal.
Preferably, adjust the phase place of transferred signal, be specially: the phase place of the transferred signal to each carrier wave is adjusted simultaneously.
Preferably, adjust the phase place of transferred signal, be specially: the transferred signal to each carrier wave is adjusted successively.
Preferably, when the modulation system of described baseband signal is cascade modulation, from the first order is modulated corresponding transferred signal, step by step the phase place of corresponding transferred signal is adjusted, when the modulation signal of to the last one-level output can correctly demodulate described baseband signal, the transferred signal that modulation at different levels are determined is as the transferred signal of described baseband signal.
Preferably, the phase place of described transferred signal comprises the carrier frequency of described transferred signal, the initial phase of described transferred signal.
Preferably, the phase place of described adjustment transferred signal is to adjust the initial phase of described transferred signal.
A device that reduces the mutual interference of multicarrier phase, comprising:
Adjustment unit, for adjusting the phase place of transferred signal;
Modulating unit, for being modulated to baseband signal described transferred signal;
Demodulating unit, for carrying out demodulation to the transferred signal after described modulating unit modulation;
Judging unit, for judging whether described demodulating unit can correctly demodulate described baseband signal, can not correctly separate timing, triggers the phase place of the described transferred signal of described adjustment unit continuation adjustment, can correctly separate timing, triggers determining unit; And
Determining unit, for the transferred signal using current transferred signal as described baseband signal.
Preferably, the phase place of the transferred signal of described adjustment unit to each carrier wave is adjusted simultaneously.
Preferably, described adjustment unit is adjusted successively to the transferred signal of each carrier wave.
Preferably, when the modulation system of described baseband signal is cascade modulation, from the first order is modulated corresponding transferred signal, described adjustment unit is adjusted the phase place of corresponding transferred signal step by step, until described judging unit determines that when the modulation signal of afterbody output can correctly demodulate described baseband signal, the transferred signal that described determining unit is determined modulation at different levels is as the transferred signal of described baseband signal.
Preferably, the phase place of described transferred signal comprises the carrier frequency of described transferred signal, the initial phase of described transferred signal.
Preferably, described adjustment unit is adjusted the initial phase of described transferred signal.
By above technical scheme, the present invention has realized following beneficial effect: can solve preferably the mutual interference problem of multi-carrier signal in wireless communication system, especially for the phase mutual interference between multi-carrier EV-DO signal in cdma system.Particularly evident to the improvement of performance in multicarrier disposed adjacent situation.Make so same wireless signal overlay area can have multicarrier to work simultaneously, greatly improved the availability of frequency spectrum, improve the flexibility of wireless planning, improve volume of business, transmission rate and the service quality of community, improved user's experience.
Brief description of the drawings
Fig. 1 is the carrier-in-interference schematic diagram of the three carrier waves appearance that cdma system frequency domain is adjacent;
Fig. 2 is to single-carrier modulated mode schematic diagram in wireless communication system;
Fig. 3 is the schematic diagram of the modulation system of multicarrier of the present invention;
Fig. 4 is the flow chart that the present invention reduces the method for multicarrier phase mutual interference;
Fig. 5 is the structural representation that the present invention selects parameter devices;
Fig. 6 is that utilization of the present invention selects parameter devices to adjust the structural representation of transferred signal;
The structural representation that disturbs processing unit falls in Fig. 7 while being carrier wave multi-level modulation of the present invention;
Fig. 8 is the composition structural representation that the present invention reduces the device of multicarrier phase mutual interference.
Embodiment
Basic thought of the present invention is: in multicarrier system, between the multicarrier that particularly frequency domain is adjacent, intercarrier can exist phase mutual interference.The present invention, by the phase place of the transferred signal of the each carrier wave of adjustment, makes the interference between multicarrier be controlled at the level that can correctly demodulate the useful signal in modulation signal.Due to the phase place of transferred signal and the carrier frequency of carrier wave and initial phase relevant, and the carrier frequency of carrier wave is planned by communication system substantially, belong to nonadjustable parameter, therefore, the present invention mainly adjustment of the initial phase by transferred signal reduces the interference between multicarrier.The present invention program realizes simple and practical.
For making the object, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Transmitting in modern wireless communication systems realizes communication by information is modulated on transferred signal, wherein, transferred signal can be produced by devices such as numerically-controlled oscillator (NCO, Numerical ControlOscillator) or simulative generators.Modulated process can be completed as polytype modulators such as real number modulator, complex modulator or quadrature modulators by modulator.
The parameter of reflection transferred signal characteristic has a lot, and frequency and phase place are wherein two.For example, transferred signal C (t) can be expressed as: C (t)=A × cos (2 π ft+ θ)+j × A × sin (2 π ft+ θ).Wherein A is amplitude, and f is carrier frequency, the initial phase that θ is transferred signal, (2 π ft+ θ) is the phase place of transferred signal, and it is the function of a frequency f, time t and initial phase θ, unified with W (t in the present invention, f, θ) represent, referred to as W.If real modulation only need to be used the real part in C (t).
In traditional multi-carrier wireless communications system, only the frequency of transferred signal is made to appointment, and do not reach by the phase place W of transferred signal being made to special appointment the object that reduces inter-carrier interference.
And the phase place W of transferred signal is a frequency f, the function of time t and initial phase θ, wherein t is the variable quantity in a moment, has represented the characteristic of signal, uncontrollable.F and θ are two controlled variablees, can reach the object that regulates transferred signal phase place W by change wherein any one or change two variablees simultaneously.In wireless communication system, the carrier position of transmitting is had to stricter requirement, thereby a little less than the deviation range relative narrower flexibility of f, and initial phase θ has larger adjustable range and flexibility.Technical scheme of the present invention proposes for this feature just.
Further illustrate this point by accompanying drawing below.
Fig. 2 be in wireless communication system to single-carrier modulated mode schematic diagram, as shown in Figure 2, figure comprises that two parts are modulator 200 and transferred signal generator 201.Modulator 200 obtains output signal y for input signal x being modulated on transferred signal, and modulator 200 is real modulation device conventional in wireless communication system, plural debugger or quadrature modulator etc.Transferred signal generator 201 is the generations that complete transferred signal according to input parameter.Two input parameters in figure, are only provided, frequency input parameter f and phase place output parameter θ.In traditional modulation system, not can correctly not demodulate useful signal according to the parameter of input signal and output signal and transferred signal phase place is done to special appointment reach the object that reduces inter-carrier interference, so phase theta is not the function of input signal x and output signal y in figure.
Fig. 3 is the schematic diagram of the modulation system of multicarrier of the present invention, as shown in Figure 3, in figure, comprise equally that two parts are modulator 300 and transferred signal generator 301, its function is identical with transferred signal generator 201 with the modulator 200 in Fig. 2, but the phase place and the frequency parameter that are input to transferred signal are the functions of input signal x and output signal y, are different from traditional signal modulated process and transferred signal phase place are not done to special appointment.The present invention, by the modulation system of Fig. 3, selectively arranges transferred signal phase place, reaches the object that reduces the mutual interference effect of intercarrier.
Fig. 4 is the flow chart that the present invention reduces the method for multicarrier phase mutual interference, and as shown in Figure 4, the method that the present invention reduces the mutual interference of multicarrier phase comprises the following steps:
Step 401: input parameter is arranged.Input parameter comprises the relevant parameter that represents input signal.For example: the type of incoming carrier is CDMA 1X signal in this example; Incoming carrier number is three carrier waves in this example; Incoming carrier positional information is 871.11MHz, 872.34MHz, the 873.57MHz that disposed adjacent is set in this example; The initial phase parameter of input transferred signal, in this example, the initial phase of carrier wave obtains the function by a random serial generator, and starts generator seed to be all set to 0 for the first time.Three carrier phase initial values that obtain by seed 0 are as input parameter; The frequency parameter of the first order transferred signal that incoming carrier is corresponding, is that disposed adjacent is-1.23MHz in this example, 0MHz, 1.23MHz.
Fig. 5 is the structural representation that the present invention selects parameter devices, as shown in Figure 5, several input parameters that the present invention needs while selecting parameter devices work have: the type parameter n of input signal, the signal number m of input signal, the positional information k of input signal, transferred signal initial phase θ, the original frequency parameter F of the feedback signal of input and transferred signal.In actual use, according to different systems or carrier case, can only use input parameter partly or completely.The present invention selects the output parameter of parameter devices to comprise transferred signal phase parameter W, the frequency parameter f of transferred signal and select parameter result indicative signal.Result indicative signal has represented to select an operating state of parameter devices, and done state is still just in running status.This device (is constantly adjusted the initial phase of transferred signal according to the parameter mode that selects shown in Fig. 3, to determine that the baseband signal that is modulated on transferred signal whether can be by correct demodulation) principle work, both can before system operation, use, also can in system running, use.
Fig. 6 is that utilization of the present invention selects parameter devices to adjust the structural representation of transferred signal, and as shown in Figure 6, modulator group, for realizing the modulation of multicarrier, can be the various types of modulators that adopt in wireless communication system.Modulator group has two groups of input signals, and one group is carrier signal (baseband signal) x1...xm of input, another one be transferred signal generator output be transferred signal 1......m.Wave multiplexer is for closing ripple by m single carrier after modulation.Coupler is for feeding back to output signal to select parameter devices, as an input parameter that selects parameter devices.Together with other input parameter, select parameter devices that the optimized algorithm according to certain is carried out to choosing of phase parameter.Finally the phase parameter W choosing and frequency parameter f are set in transferred signal generator.In the present invention, also comprise demodulator (not shown), carry out demodulation with the signal to after the modulation of last output, can will after the modulation of finally output, after signal multiplexing, be input in demodulator, the demodulation result of demodulator is input to of the present invention choosing in parameter devices, as whether continuing adjustment by the foundation of the initial phase of signal after adjusting.Demodulator is selected existing demodulator.
The present invention demodulates modulated baseband signal by demodulating equipment is set, compare with pre-configured baseband signal, if the same think that the interference between each carrier wave meets communicating requirement, otherwise do not meet communicating requirement, continue to adjust the initial phase place value of each carrier wave, until can correctly demodulate baseband signal.This demodulating equipment can be realized by hardware or software, can be existing any demodulator or the software realized by demodulating algorithm.
Step 402: the baseband signal that demodulation is modulated by transferred signal.The process of signal demodulation is the inverse process of signal modulation, determines by transferred signal by channel estimating etc., then demodulates baseband signal.
Step 403: the foundation using the comparative result of the baseband signal demodulating in step 402 and pre-configured baseband signal as transferred signal Selecting phasing.If the baseband signal demodulating is identical with pre-configured baseband signal, exit phase place and adjust flow process, enter into step 405, otherwise enter into step 404: adjust stepping amount (adjustment amount), and return to step 401 and further adjust by the initial phase of transferred signal.
The adjustment algorithm of transferred signal initial phase is a constantly process for circulation, until the baseband signal demodulating meets the demands, Shi Caihui exits circulation.Below describe initial phase adjustment process of the present invention in detail.
First provide successively from big to small numbering from big to small according to the frequency parameter of transferred signal.As in this example-1.23MHz corresponding be numbered 1,0MHz corresponding be numbered 2,1.23MHz corresponding be numbered 3; Transferred signal phase place arranges the height of priority the numbering according to transferred signal is determined.If disposed adjacent, number so minimum priority minimum, the highest priority of numbering is taken second place, and the priority of other numbering is arranged from big to small according to the size order of numbering.If carrier wave is non-disposed adjacent, transferred signal numbering is priority so, and larger priority is higher.After completing, setting will obtain a priority and transferred signal numbering array corresponding and that arrange from high to low one by one.This example for be the continuous situation of carrier frequency of carrier wave, the priority that therefore transferred signal of each numbering is corresponding is: numbering 1 correspondence be 1, numbering 2 correspondences be 3, numbering 3 correspondences be 2.The larger priority of priority numeral is higher.
When initial phase is adjusted, the stepping amount (adjustment amount) of each adjustment need to be set, the coarse adjustment stepping amount of setting of the present invention is 20 °, progressively dwindles stepping amount can not meet the demands time, until determine suitable initial phase.
How to realize the initial phase of carrier wave to adjust as example explanation the present invention taking stepping amount as 20 °.Change respectively initial phase (generally taking initial phase as the 0 ° of beginning) value of carrier wave 1,2,3, note, here the initial phase of carrier wave changes, the initial phase that is not three carrier waves changes identical, when each adjustment carrier wave initial phase, phase place between three carrier waves is can not be identical, if the initial phase of three carrier waves is identical all the time, the initial phase that is equivalent to three carrier waves is always 0 °, disturbed condition between it will be identical all the time, and this phase place adjustment is nonsensical.The present invention is the situation of determining the interference minimum between each phase value that each phase value corresponding to each carrier wave (taking the integral multiple of stepping amount as increment) is corresponding with other carrier waves (taking the integral multiple of stepping amount as increment), and will disturb each carrier wave (transferred signal) of minimum as the transferred signal of baseband signal.
As previously mentioned, the change value of each carrier wave initial phase can realize by the aforesaid parameter devices of selecting, as long as be that each carrier wave is set corresponding carrier wave increase and decrease mark (taking the integral multiple of aforesaid stepping amount as increment) by the program of setting, as long as the disturbed condition between initial phase place values all between each carrier wave is determined.
In the time that stepping amount is 20 °, while can not determine out the baseband signal of the correct each carrier wave of demodulation simultaneously between each carrier wave, adjust stepping amount, for example be adjusted into 10 °, while again appearance with various initial phases between definite each carrier wave respectively in the manner aforesaid, can the disturbed condition (make each carrier wave all can demodulate baseband signal) between each carrier wave, each carrier wave all can correctly demodulate the transferred signal of baseband signal as the transferred signal of the baseband signal of each carrier wave.Still can not determine out if the transferred signal of the baseband signal of each carrier wave 20 ° time, further adjust stepping amount, for example be adjusted into 5 ° or 1 ° etc., still in the manner aforesaid the initial phase of each carrier wave adjusted, thereby determine the transferred signal that each carrier wave can correct demodulated base band signal.
It should be noted that, the initial phase of above-mentioned each carrier wave can be the mode of simultaneously adjusting, the initial phase that is each carrier wave changes (initial phase of each carrier wave can not identical) simultaneously simultaneously, thereby determines each carrier wave and all can correctly demodulate the transferred signal of baseband signal.Also can adjust successively the initial phase of each carrier wave, first change the initial phase of wherein one or two above carrier wave, make the initial phase of at least one carrier wave wherein constant, thereby determine each carrier wave and all can correctly demodulate the transferred signal of baseband signal.No matter the adjustment mode of initial phase is how the mode of determining transferred signal is but identical.
It should be noted that, the present invention is equally applicable to the situation that more than three carrier wave is adjusted, concrete, set respectively by aforesaid mode the stepping amount that carrier wave initial phase is adjusted, by set stepping amount to each carrier wave the disturbed condition in various initial phases (taking the integral multiple of stepping amount as increment), until determine each carrier wave and all can correctly demodulate the transferred signal of baseband signal.
Step 405: solidify the initial phase of carrier wave, determine the transferred signal as modulating baseband signal by the transferred signal of current definite initial phase place value.
It should be noted that, when the modulation system of baseband signal is cascade modulation, from the first order is modulated corresponding transferred signal, step by step the phase place of corresponding transferred signal is adjusted, when the modulation signal of to the last one-level output can correctly demodulate baseband signal, the transferred signal that modulation at different levels are determined is as the transferred signal of baseband signal.
The structural representation that disturbs processing unit falls in Fig. 7 while being carrier wave multi-level modulation of the present invention, be the applicable cases of m carrier wave n level modulation as shown in Figure 7.Each transferred signal that the modulator group of every grade generates transferred signal generator group is adjusted, and the mode of adjustment and aforesaid adjustment mode are similar.Select the frequency parameter F of transferred signal in the input parameter of parameter devices to expand to m, n group, the initial phase θ of transferred signal expands to m n group.Can be optionally when multi-level modulation the initial phase of one-level or multistage transferred signal be adjusted, be its objective is and make determined transferred signal can correctly demodulate baseband signal.In the present invention, also comprise the demodulator (not shown) to signal demodulation after the modulation of afterbody output, can will after the modulation of afterbody output, after signal multiplexing, be input in corresponding demodulator, the demodulation result of demodulator is input to of the present invention choosing in parameter devices, as the foundation that whether continues to adjust the initial phase of signal after modulation.Demodulator is selected existing demodulator.
The technical scheme that the present invention records is suitable for dissimilar multicarrier equally in multicarrier mode of operation, as the mixed configuration of the carrier wave EV-DO signal in cdma system and carrier wave 1X signal.
For the interference problem between each carrier wave in different communication systems, the initial phase adjustment stepping amount of carrier wave is still set respectively by aforesaid mode, and to each carrier wave when various phase places (taking the integral multiple of stepping amount as increment), whether each carrier wave all can correctly demodulate baseband signal, and each carrier wave all can correctly demodulate the transferred signal of baseband signal as the transferred signal of each carrier wave baseband signal.Initial phase between different communication systems is adjusted carrier wave initial phase the indifference in mode and homologous ray, and standard remains each carrier wave all can correctly demodulate baseband signal.
The technical scheme that the present invention records is applicable to the wireless communication system of other standard equally, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access) system and TD SDMA (TD-SCDMA, Time Division-Synchronous Code Division Multiple Access) system.
Fig. 8 is the composition structural representation that the present invention reduces the device of multicarrier phase mutual interference, as shown in Figure 8, the device that the present invention reduces the mutual interference of multicarrier phase comprises adjustment unit 80, modulating unit 81, demodulating unit 82, judging unit 83 and determining unit 84, wherein, adjustment unit 80 is for adjusting the phase place of transferred signal; Modulating unit 81 is for being modulated to baseband signal described transferred signal; Demodulating unit 82 is for carrying out demodulation to the transferred signal after described modulating unit modulation; Judging unit 83, for judging whether demodulating unit 80 can correctly demodulate described baseband signal, can not correctly separate timing, triggers the phase place of the described transferred signal of adjustment unit 80 continuation adjustment, can correctly separate timing, triggers determining unit 84; Determining unit 84 is for the transferred signal using current transferred signal as described baseband signal.The phase place of the transferred signal of adjustment unit 80 to each carrier wave is adjusted simultaneously.Adjustment unit 80 is adjusted successively to the transferred signal of each carrier wave.The phase place of transferred signal comprises the carrier frequency of described transferred signal, the initial phase of described transferred signal.Adjustment unit 80 is adjusted the initial phase of described transferred signal.
When the modulation system of baseband signal is cascade modulation, from the first order is modulated corresponding transferred signal, adjustment unit 80 is adjusted the phase place of corresponding transferred signal step by step, until judging unit 84 determines that when the modulation signal of afterbody output can correctly demodulate described baseband signal, the transferred signal that determining unit 84 is determined modulation at different levels is as the transferred signal of described baseband signal.
Those skilled in the art are to be understood that, the device of the reduction multicarrier phase mutual interference shown in Fig. 8 of the present invention is that the method for realizing the mutual interference of aforementioned reduction multicarrier phase designs, the practical function of the each processing unit in Fig. 8 shown device can be understood with reference to the associated description in the method for aforementioned reduction multicarrier phase mutual interference, the function of each unit can realize by the program running on processor, also can realize by corresponding logical circuit.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (10)
1. a method that reduces the mutual interference of multicarrier phase, is characterized in that, comprising:
Input parameter is set, and described input parameter comprises the relevant parameter that represents input signal;
Adjust the initial phase of transferred signal according to the input parameter arranging;
Adjust the phase place of transferred signal by adjusting initial phase;
Baseband signal is modulated on described transferred signal; And
Judge whether correctly to demodulate described baseband signal, can not correctly separate timing, continue to adjust the initial phase of described transferred signal, and while continuing to adjust the initial phase of described transferred signal, the phase place between each carrier wave can not be identical; Can correctly separate timing, the transferred signal using current transferred signal as described baseband signal.
2. method according to claim 1, is characterized in that, adjusts the initial phase of transferred signal, is specially: the initial phase of the transferred signal to each carrier wave is adjusted simultaneously.
3. method according to claim 1, is characterized in that, adjusts the initial phase of transferred signal, is specially: the initial phase of the transferred signal to each carrier wave is adjusted successively.
4. method according to claim 1, it is characterized in that, when the modulation system of described baseband signal is cascade modulation, from the first order is modulated corresponding transferred signal, step by step the phase place of corresponding transferred signal is adjusted, when the modulation signal of to the last one-level output can correctly demodulate described baseband signal, the transferred signal that modulation at different levels are determined is as the transferred signal of described baseband signal.
5. according to the method described in any one in claim 1 to 4, it is characterized in that, the phase place of described transferred signal comprises the initial phase of the carrier frequency of described transferred signal, described transferred signal.
6. a device that reduces the mutual interference of multicarrier phase, is characterized in that, comprising:
Adjustment unit, for input parameter is set, and according to the initial phase of the input parameter adjustment transferred signal arranging, adjusts the phase place of transferred signal by adjusting initial phase, wherein, described input parameter comprises the relevant parameter that represents input signal;
Modulating unit, for being modulated to baseband signal described transferred signal;
Demodulating unit, for carrying out demodulation to the transferred signal after described modulating unit modulation;
Judging unit, be used for judging whether described demodulating unit can correctly demodulate described baseband signal, can not correctly separate timing, trigger the initial phase that described adjustment unit continues to adjust described transferred signal, when the initial phase of described transferred signal is adjusted in described continuation, the phase place between each carrier wave can not be identical; Can correctly separate timing, trigger determining unit; And
Determining unit, for the transferred signal using current transferred signal as described baseband signal.
7. device according to claim 6, is characterized in that, the initial phase of the transferred signal of described adjustment unit to each carrier wave is adjusted simultaneously.
8. device according to claim 6, is characterized in that, the initial phase of the transferred signal of described adjustment unit to each carrier wave is adjusted successively.
9. device according to claim 6, it is characterized in that, when the modulation system of described baseband signal is cascade modulation, from the first order is modulated corresponding transferred signal, described adjustment unit is adjusted the phase place of corresponding transferred signal step by step, until described judging unit determines that when the modulation signal of afterbody output can correctly demodulate described baseband signal, the transferred signal that described determining unit is determined modulation at different levels is as the transferred signal of described baseband signal.
10. according to the device described in any one in claim 6 to 9, it is characterized in that, the phase place of described transferred signal comprises the initial phase of the carrier frequency of described transferred signal, described transferred signal.
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| CN200910165247.8A CN101998595B (en) | 2009-08-08 | 2009-08-08 | Method and device for reducing mutual interference of multiple carriers |
| PCT/CN2009/075844 WO2011017880A1 (en) | 2009-08-08 | 2009-12-22 | Method and device for reducing mutual interference between multiple carriers |
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| CN200910165247.8A CN101998595B (en) | 2009-08-08 | 2009-08-08 | Method and device for reducing mutual interference of multiple carriers |
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| CN101998595A (en) | 2011-03-30 |
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