CN101207428A - Method for anti-self excitation of straight amplification station system - Google Patents
Method for anti-self excitation of straight amplification station system Download PDFInfo
- Publication number
- CN101207428A CN101207428A CNA2006101243241A CN200610124324A CN101207428A CN 101207428 A CN101207428 A CN 101207428A CN A2006101243241 A CNA2006101243241 A CN A2006101243241A CN 200610124324 A CN200610124324 A CN 200610124324A CN 101207428 A CN101207428 A CN 101207428A
- Authority
- CN
- China
- Prior art keywords
- signal
- digital
- self
- link
- excitation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Radio Relay Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides an anti-self-excitation method in a repeater system, and is applicable to the uplink and the downlink of a co-frequency wireless repeater. The method includes the following steps of: (1) taking a RF signal to be outputted in the coupling circuit in the uplink or the downlink in the repeater as a reference signal; (2) down converting the single in an affiliated link and the reference signal from a RF signal format to a baseband signal format; (3) eliminating the self-excitation element of the link signal in the affiliated link on the basis of the reference signal in the baseband level, for outputting a multi-carrier wave baseband signal of which the self-excitation interference signal is eliminated; (4) up converting the multi-carrier wave baseband signal into the RF signal and feeding the RF signal into the uplink or the downlink. The invention can cause the co-frequency wireless repeater to eliminate the self-excitation interference produced by the feedback signal effectively and adaptively, can lessen the requirement of the isolation degree of forward and backward antennas, can improve the gain of the system, can enlarge the coverage of the repeater, and is applicable for GSM/CDMA/CDMA2000/WCDMA, and other systems.
Description
[technical field]
The present invention relates to moving communicating field, relate in particular to in the frequency wireless discharging-directly station a kind of method for anti-self excitation of straight amplification station system.
[background technology]
Adopt duplexer to carry out the switching of uplink downlink with the frequency wireless discharging-directly station more, utilize forward facing antenna to receive the base station down signal, through low noise amplifier useful signal is amplified, again behind the narrow band filter multiple filter further with power amplifier with power amplification, be transmitted into travelling carriage by rearward-facing antenna; Utilize rearward-facing antenna receiving mobile upward signal simultaneously, be transmitted into the base station through low noise amplifier, narrow band filter, power amplifier.Its advantage is: with the cost increase coverage territory far below the base station investment, mounting condition is simple, can enlarge network coverage face fast; Improve the utilization rate of equipment and installations of base station, improve the covering quality of existing Cellular Networks.
But in actual applications, with wireless discharging-directly station is nearer owing to forward and backward antenna infield frequently, be coupled inevitably, if system gain is too big, during greater than the isolation between the forward and backward antenna of repeater, self-oscillation will take place in the repeater, causes the base stations control channel block, even causes the base station paralysis.
In with the frequency radio repeater system, the formed interference source of this feedback signal, can cause the receiver system performance decrease, and then make that the system gain of frequency wireless discharging-directly station hangs down about 10～15dB than the isolation between transmitting antenna and reception antenna usually together, can influence the covering power of direct discharging station so again.In order to improve with the system gain of wireless discharging-directly station frequently, just need to improve the isolation between the dual-mode antenna, so just formed a pair of contradiction with aforementioned, in the engineering application, be difficult to realization usually.Therefore,, enlarge its coverage, need suitable technique and suppress or eliminate the self-excitation interference that feedback signal produces in order to improve system gain with the frequency wireless discharging-directly station.
[summary of the invention]
Purpose of the present invention will overcome above-mentioned deficiency exactly, provide a kind of can the elimination adaptively to disturb with the self-excitation that feedback signal produced in the frequency wireless discharging-directly station, reduce dependence to forward and backward antenna high-isolation, improve system gain, increase the method for anti-self excitation of straight amplification station system in the same wireless discharging-directly station frequently of being applied in of coverage.
The objective of the invention is to be achieved through the following technical solutions:
Method for anti-self excitation of straight amplification station system of the present invention is applied to comprise the steps: in the uplink and downlink link with the frequency wireless discharging-directly station
1) coupling one tunnel is about to the radiofrequency signal of output as the reference signal in the upstream or downstream link of repeater;
2) signal in the affiliated link and described reference signal are downconverted to the baseband signal form from the radiofrequency signal form;
3) the autoexcitation composition of link signal in the link under base band level is eliminated based on described reference signal has been eliminated the multicarrier baseband signal of self-excitation interference signal with output;
4) described multicarrier baseband signal is up-converted in the radiofrequency signal feed-in upstream or downstream link.
Wherein step 3) also comprises the steps:
3.1 use up-to-date coefficient that the reference signal of described base band level is carried out digital filtering, to obtain the approximation signal of aerial self-excitation feedback signal;
3.2 the link signal of base band level is deducted described approximation signal, obtains to have eliminated the error signal of self-excitation feedback signal, to export as the multicarrier baseband signal;
3.3 utilize the up-to-date coefficient of error signal calculation filter, and be transferred to described filter.
When the lead time of each parts of repeater hour, then also should comprise the steps:
3.4 adjust lead time between described error signal and the reference signal with output multicarrier baseband signal.
In addition, step 3.3 specifically comprises the steps:
3.3.1 the link signal of base band level of input is carried out energy to be calculated;
3.3.2 calculate the inverse of link signal energy;
3.3.3 error signal and energy inverse are long-pending;
3.3.4 the more new increment of calculating filter coefficient;
3.3.5 former coefficient of calculating filter and described more new increment sum also export described filter to.
Described step 2 specifically comprises:
2.1 the link signal in the affiliated link and reference signal are mixed to the intermediate-freuqncy signal of analog format respectively;
2.2 based on decay controlling value decay respectively intermediate frequency link signal and intermediate frequency reference signal;
2.3 two kinds of intermediate-freuqncy signals after will decaying respectively are converted to number format;
2.4 respectively two kinds of digital medium-frequency signals are downconverted to baseband signal;
2.5 based on the required pad value of the reference signal calculation procedure 2.2 of base band level.
Wherein step 2.5 also comprises:
2.5.1 calculate from the energy of the digital intermediate frequency reference signal of step 2.4 acquisition;
2.5.2 the energy of reference signal is compared with default thresholding, to differentiate the self-excitation state that whether is in;
2.5.3 produce the required pad value of step 2.2 according to differentiating the result.
Described step 4 specifically comprises:
4.1 the multicarrier baseband signal of step 3.2 or 3.4 outputs is up-converted into digital medium-frequency signal;
4.2 the intermediate-freuqncy signal of step 4.1 is converted to analog format;
4.3 the analog signal of step 4.3 is up-converted into the radio frequency form.
Preferably, before step 1, link signal is carried out the low noise Filtering Processing; After step 4, link signal is carried out power amplification handle.
Realize that for convenient the duplexer of the base station end from the repeater of the reference signal in the up link is coupled and gets, the duplexer of the capped end from the repeater of the reference signal in the down link is coupled and gets.
In addition, described self-excitation eliminating method and described decay control method can be integrated in same FPGA or the dsp chip jointly.Described Digital Down Convert and described analog-to-digital conversion can use special chip to realize respectively, also can use a slice to have the special chip of analog-to-digital conversion and Digital Down Convert function to realize, also can be that Digital Down Convert realizes in fpga chip or dsp chip and analog-to-digital conversion is still used the special chip realization.Described Digital Up Convert and described digital-to-analogue conversion can use special chip to realize respectively, also can use a slice to have the special chip of Digital Up Convert and digital-to-analogue conversion function to realize simultaneously, also can be that Digital Up Convert realizes in fpga chip or dsp chip and special chip is still used in digital-to-analogue conversion.
Compared with prior art, the present invention possesses following advantage: the present invention can make it applied with the radio repeater system self adaptation elimination self-excitation that feedback signal produced interference effectively frequently, reduce demand to the forward and backward isolation between antennas, improve system gain, increase the coverage of repeater.
[description of drawings]
Fig. 1 is for using a kind of theory diagram with the frequency radio repeater system of the inventive method;
Theory diagram when Fig. 2 realizes with hardware for the present invention, wherein the analog down converter part is not shown.
[embodiment]
The present invention is further illustrated below in conjunction with drawings and Examples:
Please in conjunction with Fig. 1 and Fig. 2, Fig. 1 is a theory diagram of having used the same frequency wireless discharging-directly station of method for anti-self excitation of straight amplification station system of the present invention, the theory diagram when Fig. 2 realizes with hardware for the present invention, but analog down converter wherein is shown in Figure 1.
Among Fig. 1, by DT end duplexer 11, descending amplification module 12,14, descending anti-self excitation module 13, MT end duplexer 15 constitute down link, constitute up link jointly by MT end duplexer 15, up amplification module 22,24, up anti-self excitation module 23 and DT end duplexer 11.
Wherein, uplink and downlink amplification module 22,24,12,14 can be low noise amplification module 12,22 or power amplifier module 14,24, preferably, as shown in Figure 1, the anti-self excitation module 13 in the uplink and downlink link, low noise amplification module 12 was set before 23,22, power amplifier module 14,24 then is set thereafter.Also can only establish an amplification module in the upstream or downstream link, also can set up a plurality ofly, be decided according to the actual requirements.
In the down link, donor antenna (not shown) is from being coupled to the radiofrequency signal of base station in the air, enter low noise amplification module 12 through DT end duplexer 11, in low noise amplification module 12 behind the noise of filtered signal, enter anti-self excitation module 13, eliminate wherein by behind the self-energizing composition of cover antenna (not shown), after amplifying through power amplifier module 14 again, can hold duplexer 15 radiofrequency signal to be retransmitted to travelling carriage through MT by cover antenna.
In like manner, in the up link, the upward signal that cover antenna is coupled to is after MT end duplexer 15 enters low noise amplification module 22 filter noise, enter anti-self excitation module 23 and eliminate the autoexcitation composition, again after power amplifier module 24 amplifies, can through DT hold duplexer 11 by donor antenna with radio signal transmission to the base station.
Described anti-self excitation module 13,23, the autoexcitation composition of link signal under being used to eliminate, be about to the radiofrequency signal of output as the reference signal by coupling in affiliated link one tunnel, downconvert to baseband signal, in base band level to its filtering, after driver unit is come from filtering, deduct the autoexcitation part with the signal of flowing through in the affiliated link, promptly become error signal, carry out suitable time-delay adjustment as required, just become the multicarrier baseband signal, again the multicarrier baseband signal is carried out up-conversion to radiofrequency signal, just finished its anti-self-excitation process.In conjunction with Fig. 1 and Fig. 2, specifically, described anti-self excitation module 13,23 comprises reference signal generation module, down-conversion device, self-excitation cancellation module 34 and means of upconversion.
Described reference signal generation module, it is connected with DT end duplexer 11 in up link, be about to the up radiofrequency signal of output as the reference signal from 11 couplings one tunnel of DT end duplexer, and in down link the time, then be connected, be about to the downlink radio-frequency signal of output as the reference signal from 15 couplings one tunnel of MT end duplexer with MT end duplexer 15.
Down-conversion device, be used for the link signal and the described reference signal of affiliated link are downconverted to the baseband signal form from the radiofrequency signal form, as depicted in figs. 1 and 2, each anti-self excitation module 13,23 down-conversion device is by two analog down converter (131,133 in line link as follows; In the up link 231,233) and two automatic attenuation module 31,37, two analog to digital converters 32,38 and two digital down converters 33,39 form:
Described analog down converter 131,133,231,233 is used for the intermediate-freuqncy signal that radio frequency link signal and radio frequency reference signal with affiliated link (up link and down link) are mixed to analog format respectively.In the Uplink/Downlink, on/descending first analog down converter 131,231 accepts/input of the radiofrequency signal of descending low noise amplifier 12,22, carry out mixing, and the intermediate-freuqncy signal of final output simulation is to the first automatic attenuation module 31 that is used to handle the downstream signal decay.Be used for handling second analog down converter 133 of Uplink/Downlink reference signal, to hold duplexer 11 by DT/MT for 233,15 couplings and conversion of signals be analog if signal, export the second automatic attenuation module 37 that is used to handle the reference signal decay then to;
Described two automatic attenuation module 31,37 are used for based on pad value decay respectively intermediate frequency link signal and intermediate frequency reference signal.The first automatic attenuation module 31 is connected 131 with first analog down converter, accepts the intermediate-freuqncy signal of Uplink/Downlink; 37 of the second automatic attenuation module are connected with second analog down converter 133 accepts its intermediate-freuqncy signal;
Two analog to digital converters 32,38, two kinds of intermediate-freuqncy signals after being used for will decaying respectively are converted to number format, also be, first analog to digital converter 32 is connected with the first automatic attenuation module 31, with on after the decay/downstream signal carries out modulus sampling, becomes the intermediate-freuqncy signal of number format; Second analog to digital converter 38 is connected with the second automatic attenuation module 37, with the decay after on/downlink reference signal is a number format through the modulus sample conversion;
Two digital down converters 33,39, the digital medium-frequency signal that is used for respectively two analog to digital converters 32,38 being exported downconverts to baseband signal.Wherein, first digital down converter 33 is connected 32 with first analog to digital converter, with the transmission of first analog to digital converter 32 come on/downstream signal downconverts to digital baseband signal; Second digital down converter 39 is connected with second analog to digital converter 38, and the reference signal in the Uplink/Downlink that 38 transmission of second analog to digital converter are next downconverts to digital baseband signal;
The calculating energy unit is used to calculate the energy from the reference signal of second digital down converter, 39 acquisitions;
The self-excitation judgement unit is used for the energy of reference signal is compared with default thresholding, to differentiate the self-excitation state that whether is in;
The pad value generation unit is used for producing pad value and exporting two automatic attenuation module 31,37 to according to differentiating the result.
Its step that produces pad value is as follows:
(1) initial count value that pre-sets calculator is cnt=0, pad value ATTv=MAX
(2) the calculating energy unit is calculated as follows the energy pow of the MT end/DT terminal number word of input with reference to baseband signal
(3) the self-excitation judgement unit with energy pow and the thresholding T that pre-sets relatively, if pow 〉=T then enter step (1); Otherwise enter step (4)
(4) whether the pad value generation unit judges cnt greater than maximum, if not cnt=cnt+1 then, enters step (2), otherwise cnt=0, and judging whether ATTv greater than minimum value, the words that are are ATTv=ATTv-1 then, enters step (2) then.
Described self-excitation cancellation module 34, the autoexcitation composition that is used for link link signal under base band level is eliminated based on described reference signal, eliminated the multicarrier baseband signal of self-excitation interference signal with output, it comprises that specifically filter 340, error signal produce submodule 342, filter coefficient update submodule 341 and error signal delay submodule 343:
Error signal produces submodule 342, be connected respectively with described first digital frequency converter 33, filter 340, error signal delay submodule 343 and filter coefficient update submodule 341, be used for the input of first digital frequency converter 33/downlink double/multi-load wave number word baseband signal deducts the approximation signal by described filter 340 inputs respectively, the digital baseband look for transmissions signal of self-excitation feedback signal has been eliminated in acquisition, be referred to as error signal, the error signal of acquisition outputs to filter coefficient update submodule 341 and error signal delay submodule 343 respectively;
Filter coefficient update submodule 341 is based on the principle of LMS criterion adaptive filter algorithm, by to the error signal that produces the submodule input by error signal and on/descending digital baseband reference signal carries out corresponding computing, the required up-to-date coefficient of filtering when the filter 340 that the self adaptation real-time update is attached thereto carries out filtering, make the signal of filter 340 outputs approach aerial self-excitation feedback signal, filter coefficient update submodule 341 comprises as lower unit:
Energy calculation unit is used for the link signal of base band level to input and carries out energy and calculate;
Computing unit reciprocal is used to calculate the inverse of link signal energy;
The product computing unit, it is long-pending to be used for error signal and energy inverse;
The incremental computations unit is used for the more new increment of calculating filter coefficient;
The filter coefficient computing unit is used for former coefficient of calculating filter and described more new increment sum and exports described filter 340 to.
Corresponding calculation step when specifically, carrying out filter coefficient update is as follows:
(1) by following formula the following/upstream digital base band reference signal of input being carried out energy by energy calculation unit calculates
(2) by the 1/p reciprocal of computing unit calculating energy reciprocal
n
(3) produce the error signal of submodule input and the product of energy inverse by product computing unit error signal
(1/p
n)·e
n
(4) by the more new increment of incremental computations unit calculating filter coefficient
[(1/p
n)·e
n]·(x
L-l-m n)
*
(5) by the filter coefficient computing unit new increment is more carried out obtaining current renewal increment Delta w behind the suitable cut position
n, with the coefficients w after the acquisition renewal after the up-to-date coefficient addition of filter to be updated
n
343 pairs of error signals of error signal delay submodule produce the error signal of submodule 342 inputs and carry out exporting the Digital Up Convert submodule 35 that the multicarrier baseband signal is given means of upconversion after the suitable delay; Thereby the purpose that 343 pairs of error signals of use error signal delay submodule postpone is to have the regular hour gap uncorrelated in order to ensure the following/upstream digital that obtains with reference to the to be transmitted descending/uplink baseband digital signal of baseband signal and input; the retardation of 343 pairs of error signals of error signal delay submodule is adjustable; when digital up converter 33; 39; simulation upconverter 132; 232 with amplifying circuit 12; 14; 22; 24; the low-converter 133 of reference signal; 233 and corresponding down/delay of uplink reference signals Digital Down Convert link is enough greatly the time; error signal delay submodule 343 can remove, and this moment, the multicarrier error signal was without postponing directly to export to direct discharging station.
Means of upconversion, the multicarrier baseband signal that is used for handling back output by described self-excitation cancellation module 34 is up-converted into radiofrequency signal.As depicted in figs. 1 and 2, in first link, described means of upconversion comprises digital up converter 35, digital to analog converter 36 and simulation upconverter 132,232.
Described digital up converter 35, is connected with the error signal delay submodule 343 of described self-excitation cancellation module 34 or error signal delay submodule 342 (when the lead time of each parts in the repeater is enough big), is used for the baseband signal that self-excitation cancellation module 34 is exported is up-converted into digital medium-frequency signal;
Digital to analog converter 36 is connected with described digital up converter 35, is used for the intermediate-freuqncy signal of digital up converter 35 outputs is converted to analog format;
Simulation upconverter 132,232 is connected with digital to analog converter 36, is used for the signal of described digital to analog converter 36 outputs is up-converted into the radio frequency form.
Thus, with in the radio repeater system frequently, on/downstream signal enters through cover antenna/donor antenna, behind MT end/DT end duplexer 15,11, at up/descending low noise amplifier 22, its noise section of filtering in 12, pass through then described on/descending anti-self excitation module 23,13 handles.Anti-self excitation module 23, in 13, on the one hand by second analog down converter 233,133 will hold from DT/MT holds duplexer 11,15 link signals that are coupled to are converted to analog if signal, decay according to the error amount that decay control module 30 produces through the second automatic attenuation module 37, be converted to number format through second analog to digital converter 38, be downconverted into reference to baseband signal by the intermediate-freuqncy signal of second digital down converter 39 again number format, in decay control module 39, produce the automatic attenuation module 31 of control, 37 pad value, the filter factor that relies on 341 generations of filter coefficient update submodule in the FIR of self-excitation cancellation module 34 filter 340 carries out filtering simultaneously, and the error signal that filtered result exports self-excitation cancellation module 34 to produces in the submodule 342; In like manner, on the other hand, by first analog down converter 231,131 radiofrequency signals that will obtain from Uplink/Downlink downconvert to analog if signal, behind the first automatic attenuation module 31, first analog to digital converter 32, first digital down converter 33, the error signal of directly directly going in the self-excitation cancellation module 34 produces in the submodule 342.After error signal generation submodule 342 will deduct the approximation signal of being imported by filter 340 by the signal of first digital down converter, 33 inputs, output error signal, after error signal delay submodule 343 is done suitable processing, with the multicarrier baseband signal through digital up converter 35 up-conversions to intermediate-freuqncy signal, in digital to analog converter 36, convert number format to, again through simulation upconverter 232,132 are converted to radiofrequency signal with intermediate-freuqncy signal, send into/downlink power amplifier 24, after in 14 this radiofrequency signal being amplified, transferring to donor antenna/cover antenna through DT end/MT end duplexer 11,15 launches.
In described anti-self excitation module 13,23, described self-excitation cancellation module 34 is integrated in a FPGA or the dsp chip simultaneously with described decay control module 30; Described analog to digital converter 32,38 and described digital down converter 33,39 can adopt special chip to realize respectively, also can use a slice to have the special chip of modulus sampling and Digital Down Convert function to realize, it also can be digital down converter 33,39 realize in fpga chip or dsp chip and analog to digital converter 32,38 still adopts special chip to realize.
In like manner, described digital up converter 35 and digital to analog converter 36 can use special chip to realize respectively, also can separately realize, digital up converter 35 also can be realized by a slice FPGA or dsp chip.
As everyone knows, the repeater also comprises Monitor And Control Subsystem 4 and power subsystem 5, Monitor And Control Subsystem 4 is responsible for the various states of repeater are monitored, state that can the teletransmission system is given Surveillance center, and can accept various parameter settings to system, comprise described pad value, the up-to-date coefficient of filter etc. are set; And power subsystem 5 is responsible for the repeater is powered.
The present invention has overcome in the repeater because the defective that the autoexcitation signal produces, improved the coverage of repeater indirectly, be applicable to the direct discharging station of system such as GSM/CDMA/CDMA2000/WCDMA, can also be applied to systems such as TD-SCDMA direct discharging station and Digital Television through suitable improvement.
The present invention is described in narrative mode all the time, and wherein employed term is intended to describe and unrestricted.According to above description, can make many further modifications to the present invention, also can do many variations according to actual needs.Therefore, in additional claim scope, the present invention can adopt various implementation to specifically described embodiment.
Claims (10)
1. a method for anti-self excitation of straight amplification station system is characterized in that comprising the steps:
1) coupling one tunnel is about to the radiofrequency signal of output as the reference signal in the upstream or downstream link of repeater;
2) signal in the affiliated link and described reference signal are downconverted to the baseband signal form from the radiofrequency signal form;
3) the autoexcitation composition of link signal in the link under base band level is eliminated based on described reference signal has been eliminated the multicarrier baseband signal of self-excitation interference signal with output;
4) described multicarrier baseband signal is up-converted in the radiofrequency signal feed-in upstream or downstream link.
2. method for anti-self excitation of straight amplification station system according to claim 1 is characterized in that step 3) also comprises the steps:
3.1 use up-to-date coefficient that the reference signal of described base band level is carried out digital filtering, to obtain the approximation signal of aerial self-excitation feedback signal;
3.2 the link signal of base band level is deducted described approximation signal, obtains to have eliminated the error signal of self-excitation feedback signal, to export as the multicarrier baseband signal;
3.3 utilize the up-to-date coefficient of error signal calculation filter, and be transferred to described filter.
3. method for anti-self excitation of straight amplification station system according to claim 2 is characterized in that step 3) also comprises:
3.4 adjust lead time between described error signal and the reference signal with output multicarrier baseband signal.
4. according to claim 2 or 3 described method for anti-self excitation of straight amplification station system, it is characterized in that step 3.3 specifically comprises the steps:
3.3.1 the link signal of base band level of input is carried out energy to be calculated;
3.3.2 calculate the inverse of link signal energy;
3.3.3 error signal and energy inverse are long-pending;
3.3.4 the more new increment of calculating filter coefficient;
3.3.5 former coefficient of calculating filter and described more new increment sum also export described filter to.
5. method for anti-self excitation of straight amplification station system according to claim 4 is characterized in that described step 2 specifically comprises:
2.1 the link signal in the affiliated link and reference signal are mixed to the intermediate-freuqncy signal of analog format respectively;
2.2 based on decay controlling value decay respectively intermediate frequency link signal and intermediate frequency reference signal;
2.3 two kinds of intermediate-freuqncy signals after will decaying respectively are converted to number format;
2.4 respectively two kinds of digital medium-frequency signals are downconverted to baseband signal;
2.5 based on the required pad value of the reference signal calculation procedure 2.2 of base band level.
6. method for anti-self excitation of straight amplification station system according to claim 5 is characterized in that step 2.5 comprises:
2.5.1 calculate from the energy of the digital intermediate frequency reference signal of step 2.4 acquisition;
2.5.2 the energy of reference signal is compared with default thresholding, to differentiate the self-excitation state that whether is in;
2.5.3 produce the required pad value of step 2.2 according to differentiating the result.
7. method for anti-self excitation of straight amplification station system according to claim 6 is characterized in that described step 4 specifically comprises:
4.1 the multicarrier baseband signal of step 3.2 or 3.4 outputs is up-converted into digital medium-frequency signal;
4.2 the intermediate-freuqncy signal of step 4.1 is converted to analog format;
4.3 the analog signal of step 4.3 is up-converted into the radio frequency form.
8. according to any described method for anti-self excitation of straight amplification station system in the claim 1 to 3, it is characterized in that: before step 1, link signal is carried out the low noise processing and amplifying; After step 4, link signal is carried out power amplification handle.
9. according to any described method for anti-self excitation of straight amplification station system in the claim 1 to 3, it is characterized in that: the duplexer of the base station end from the repeater of the reference signal in the up link is coupled and gets, and the duplexer of the capped end from the repeater of the reference signal in the down link is coupled and gets.
10. method for anti-self excitation of straight amplification station system according to claim 1 is characterized in that: described self-excitation eliminating method and described decay control method can be integrated in same FPGA or the dsp chip jointly.Described Digital Down Convert and described analog-to-digital conversion can use special chip to realize respectively, also can use a slice to have the special chip of analog-to-digital conversion and Digital Down Convert function to realize, also can be that Digital Down Convert realizes in fpga chip or dsp chip and analog-to-digital conversion is still used the special chip realization.Described Digital Up Convert and described digital-to-analogue conversion can use special chip to realize respectively, also can use a slice to have the special chip of Digital Up Convert and digital-to-analogue conversion function to realize simultaneously, also can be that Digital Up Convert realizes in fpga chip or dsp chip and special chip is still used in digital-to-analogue conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101243241A CN101207428B (en) | 2006-12-21 | 2006-12-21 | Method for anti-self excitation of straight amplification station system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101243241A CN101207428B (en) | 2006-12-21 | 2006-12-21 | Method for anti-self excitation of straight amplification station system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101207428A true CN101207428A (en) | 2008-06-25 |
| CN101207428B CN101207428B (en) | 2011-08-10 |
Family
ID=39567351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101243241A Expired - Fee Related CN101207428B (en) | 2006-12-21 | 2006-12-21 | Method for anti-self excitation of straight amplification station system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101207428B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931451A (en) * | 2010-09-19 | 2010-12-29 | 福建邮科通信技术有限公司 | Self-excitation processing method for repeater |
| CN102223737A (en) * | 2011-06-10 | 2011-10-19 | 武汉虹信通信技术有限责任公司 | Self-excitation interference elimination method of global system for mobile communication (GSM) repeater based on time slot detection |
| CN102355296A (en) * | 2011-06-30 | 2012-02-15 | 武汉虹信通信技术有限责任公司 | Interference counteraction system used for co-frequency repeater and method thereof |
| CN102739324A (en) * | 2012-06-15 | 2012-10-17 | 京信通信***（中国）有限公司 | Control method and device for self-excitation cancellation device or system |
| CN103856424A (en) * | 2014-03-04 | 2014-06-11 | 深圳市华普特科技有限公司 | Echo interference elimination method and device of repeater |
| CN103986482A (en) * | 2014-05-27 | 2014-08-13 | 北京理工大学 | Method for suppressing passive intermodulation interference based on adaptive filtering |
| CN104009788A (en) * | 2014-05-21 | 2014-08-27 | 京信通信***（中国）有限公司 | Repeater feedback offset self-excitation-resisting method and system and repeater |
| WO2014205699A1 (en) * | 2013-06-26 | 2014-12-31 | 华为技术有限公司 | Method and device for transmitting reference signal |
| CN105491613A (en) * | 2015-12-30 | 2016-04-13 | 三维通信股份有限公司 | Detection method of TD-LTE matching of uplink and downlink |
| CN103036827B (en) * | 2008-02-27 | 2016-09-14 | 联发科技股份有限公司 | Full division duplex system and leakage cancellation method |
| CN108141785A (en) * | 2015-10-27 | 2018-06-08 | 华为技术有限公司 | The removing method and device of a kind of co-channel interference |
| CN111163023A (en) * | 2019-12-27 | 2020-05-15 | 京信通信***（中国）有限公司 | Self-excitation eliminating device, isolation degree detection method, access unit and system |
| WO2020103153A1 (en) * | 2018-11-23 | 2020-05-28 | 华普特科技（深圳）股份有限公司 | Radio signal transfer method and transfer apparatus |
| CN112034429A (en) * | 2020-01-06 | 2020-12-04 | 中国航天科工集团八五一一研究所 | Self-adaptive digital cancellation method for eliminating interference self-excitation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5757782A (en) * | 1985-11-27 | 1998-05-26 | Seiko Communications Systems, Inc. | Paging system with multiple baseband subcarriers |
| CN1472903A (en) * | 2003-03-27 | 2004-02-04 | 东方通信科技发展有限公司 | CDMA receiver system (II) with digital AGC |
| CN100352298C (en) * | 2004-09-08 | 2007-11-28 | 中兴通讯股份有限公司 | Array channel correcting method and device for time-division and duplex intelligent antenna |
-
2006
- 2006-12-21 CN CN2006101243241A patent/CN101207428B/en not_active Expired - Fee Related
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036827B (en) * | 2008-02-27 | 2016-09-14 | 联发科技股份有限公司 | Full division duplex system and leakage cancellation method |
| CN101931451B (en) * | 2010-09-19 | 2013-03-06 | 福建邮科通信技术有限公司 | Self-excitation processing method for repeater |
| CN101931451A (en) * | 2010-09-19 | 2010-12-29 | 福建邮科通信技术有限公司 | Self-excitation processing method for repeater |
| CN102223737B (en) * | 2011-06-10 | 2013-09-11 | 武汉虹信通信技术有限责任公司 | Self-excitation interference elimination method of global system for mobile communication (GSM) repeater based on time slot detection |
| CN102223737A (en) * | 2011-06-10 | 2011-10-19 | 武汉虹信通信技术有限责任公司 | Self-excitation interference elimination method of global system for mobile communication (GSM) repeater based on time slot detection |
| CN102355296B (en) * | 2011-06-30 | 2014-04-30 | 武汉虹信通信技术有限责任公司 | Interference counteraction system used for co-frequency repeater and method thereof |
| CN102355296A (en) * | 2011-06-30 | 2012-02-15 | 武汉虹信通信技术有限责任公司 | Interference counteraction system used for co-frequency repeater and method thereof |
| CN102739324A (en) * | 2012-06-15 | 2012-10-17 | 京信通信***（中国）有限公司 | Control method and device for self-excitation cancellation device or system |
| CN102739324B (en) * | 2012-06-15 | 2015-07-01 | 京信通信***（中国）有限公司 | Control method and device for self-excitation cancellation device or system |
| US10855429B2 (en) | 2013-06-26 | 2020-12-01 | Huawei Technologies Co., Ltd. | Reference signal transmission method and apparatus |
| US11496269B2 (en) | 2013-06-26 | 2022-11-08 | Huawei Technologies Co., Ltd. | Reference signal transmission method and apparatus |
| US10333677B2 (en) | 2013-06-26 | 2019-06-25 | Huawei Technologies Co., Ltd. | Reference signal transmission method and apparatus |
| CN104782054B (en) * | 2013-06-26 | 2019-02-26 | 华为技术有限公司 | The transmission method and device of reference signal |
| WO2014205699A1 (en) * | 2013-06-26 | 2014-12-31 | 华为技术有限公司 | Method and device for transmitting reference signal |
| CN104782054A (en) * | 2013-06-26 | 2015-07-15 | 华为技术有限公司 | Method and device for transmitting reference signal |
| US9800385B2 (en) | 2013-06-26 | 2017-10-24 | Huawei Technologies Co., Ltd | Reference signal transmission method and apparatus |
| CN103856424B (en) * | 2014-03-04 | 2017-01-04 | 华普特科技（深圳）股份有限公司 | A kind of repeater echo interference elimination method and device |
| CN103856424A (en) * | 2014-03-04 | 2014-06-11 | 深圳市华普特科技有限公司 | Echo interference elimination method and device of repeater |
| CN104009788A (en) * | 2014-05-21 | 2014-08-27 | 京信通信***（中国）有限公司 | Repeater feedback offset self-excitation-resisting method and system and repeater |
| CN103986482B (en) * | 2014-05-27 | 2016-02-03 | 北京理工大学 | A kind of passive intermodulation disturbance restraining method based on adaptive-filtering |
| CN103986482A (en) * | 2014-05-27 | 2014-08-13 | 北京理工大学 | Method for suppressing passive intermodulation interference based on adaptive filtering |
| CN108141785A (en) * | 2015-10-27 | 2018-06-08 | 华为技术有限公司 | The removing method and device of a kind of co-channel interference |
| CN108141785B (en) * | 2015-10-27 | 2020-12-08 | 华为技术有限公司 | Method and device for eliminating same frequency interference |
| CN105491613A (en) * | 2015-12-30 | 2016-04-13 | 三维通信股份有限公司 | Detection method of TD-LTE matching of uplink and downlink |
| WO2020103153A1 (en) * | 2018-11-23 | 2020-05-28 | 华普特科技（深圳）股份有限公司 | Radio signal transfer method and transfer apparatus |
| CN111163023B (en) * | 2019-12-27 | 2021-09-03 | 京信网络***股份有限公司 | Self-excitation eliminating device, isolation degree detection method, access unit and system |
| CN111163023A (en) * | 2019-12-27 | 2020-05-15 | 京信通信***（中国）有限公司 | Self-excitation eliminating device, isolation degree detection method, access unit and system |
| CN112034429A (en) * | 2020-01-06 | 2020-12-04 | 中国航天科工集团八五一一研究所 | Self-adaptive digital cancellation method for eliminating interference self-excitation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101207428B (en) | 2011-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101207428B (en) | Method for anti-self excitation of straight amplification station system | |
| US10498429B2 (en) | Systems and methods for a fronthaul network | |
| US9461697B2 (en) | In-service monitoring and cancellation of passive intermodulation interferences | |
| US10727896B2 (en) | Tower top device and passive intermodulation cancellation method | |
| CN101534133B (en) | Wireless transceiver | |
| US8457021B2 (en) | Repeater system | |
| US9602211B2 (en) | Distributed antenna system | |
| CN103427874A (en) | System and method for canceling high-transmission-power same-time same-frequency self-interference under multi-path environment | |
| CN101277480B (en) | Direct amplifier station eliminating self-excitation interference | |
| CN105409178A (en) | Wireless transceiver | |
| CN101207852B (en) | Straight amplification station for self-adapting eliminating self excitation disturbance | |
| CN101272155B (en) | TDD mode digital predistortion power amplifier | |
| CN103959643A (en) | Systems and methods for adaptive power amplifier linearization | |
| CN101207430B (en) | Anti-self excitation module of straight amplification station system | |
| CN201044448Y (en) | Self-adaption elimination self-excitation disturbance repeater | |
| KR100761681B1 (en) | Apparatus for canceling a noise level of amplified wireless signal in repeater and method therefor | |
| CN200997608Y (en) | Module against self excitation for high-frequency station system | |
| CN106713195B (en) | Microwave digital predistortion processing feedback circuit, closed loop circuit and transmitter and receiver | |
| CN201039179Y (en) | Base band feedback self-excitation resistance module | |
| KR20090097295A (en) | Tdd radio communication system and method through a digital pre-distortion | |
| CN201044490Y (en) | Repeater for eliminating self-excitation disturbance | |
| CN101420397B (en) | Digital repeater station and self-excited eliminating method and device | |
| CN101277479B (en) | Baseband feedback type self-excitation resistance module | |
| CN200941613Y (en) | In-band frequency shifter system, radio transmission relaying system and frequency shifting directly releasing station | |
| WO2016156950A1 (en) | Digital repeater system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20181221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |