CN204559615U - A kind of full duplex radio relay station self feed back interference suppression equipment - Google Patents
A kind of full duplex radio relay station self feed back interference suppression equipment Download PDFInfo
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- CN204559615U CN204559615U CN201520316365.5U CN201520316365U CN204559615U CN 204559615 U CN204559615 U CN 204559615U CN 201520316365 U CN201520316365 U CN 201520316365U CN 204559615 U CN204559615 U CN 204559615U
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- relay station
- feed back
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- suppression equipment
- interference suppression
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Abstract
The utility model relates to a kind of full duplex radio relay station self feed back interference suppression equipment, for receiving filter, transmitting filter and for time domain rejects trap in the relay station that spatial domain suppresses, offset by expansion NLMS and RLS algorithm realization time domain, its spatial domain suppression technology designs receiving filter and the transmitting filter realization of relay station to relay station channel matrix and relay station to subscriber station channel matrix mainly through the self feed back interference channel matrix of priori, source.This full duplex radio relay station self feed back interference suppression equipment is applicable to comparatively complicated channel circumstance, and the simplicity of design of filter is compact, lower to the degree of dependence of the prior channel information of subscriber station to relay station, relay station to source.
Description
Technical field
The utility model relates to the technical field of the station self feed back interference suppression equipment that continues, especially a kind of full duplex radio relay station self feed back interference suppression equipment.
Background technology
The region area coverage that full duplex radio relay station can provide cost performance higher for mobile communication system and the availability of frequency spectrum.Especially, in 3G and 4G mobile communication system, for improving communication data rate, full duplex radio relay station and junction network are subject to the extensive concern of scholar.3GPPTS36.216 also define the Specifications of relay station (Release11).But in full duplex radio relay station transmitting antenna and reception antenna isolation not high enough time will the self feed back of relay station be caused to disturb, this will affect communication system stability and channel capacity.
Current research direction is: from typical two-hop relaying, sets up relay station system model and studies self feed back interference producing cause and impact thereof.On the relay system model basis that this exists self feed back interference, research SISO and MIMO full duplex radio relay station is respectively at the self feed back interference mitigation technology that time domain, spatial domain and time domain and spatial domain combine.Particular content comprises:
One, the classification of relay station is introduced.Mention and use the relay station under two kinds of different agreements especially: Received signal strength is directly amplified transmission types (Amplify-and-forward, AF) after and by Received signal strength doing demodulation coding, transmission types (Decode-and-forward, DF) is modulated in re-encoding.Set up typical SISO and the MIMO double bounce relay communications system model be made up of base station, full duplex radio relay station and user.Set forth self feed back interference in full duplex SISO relay station, cause the condition disturbing even system self-excitation; The impact on MIMO relay station system channel capacity and relay station the bit error rate of received signal is disturbed in analysis self feed back.And from structure and principle, verify the validity of current main self feed back Interference Cancellation and suppression technology.
Two, full duplex SISO relay station self feed back interference time domain cancellation technology is studied: LMS, NLMS and RLS algorithm.Above-mentioned three kinds of algorithms are all and utilize self feed back channel estimation value to deduct self feed back interference signal from relay station Received signal strength.LMS algorithm is estimated feedback channel based on time statistic and signal correlation.Its convergence rate is comparatively slow and tracking performance is poor, but implementation complexity is low.NMLS is Normalized LMS Algorithm, can obtain better rate of convergence.When base station exists multi-path jamming to repeater signal, for the situation that LMS, NLMS algorithm is higher to the normalization error of self feed back channel estimating, the LMS algorithm that this enters is proposed.Utilize linear fit to the RLS algorithm of self feed back channel estimating, rate of convergence and convergence precision faster can be had.Emphatically concern three kinds of time domain cancellation technologies are to the convergence of self feed back channel estimating, convergence rate and convergence precision.Compare the performance of LMS algorithm and RLS algorithm and applicable scene.In emulation, time domain cancellation technology initiation parameter arranges and is also presented the performance impact of algorithm.
Three, time domain multichannel LMS algorithm (Multi-Channel LMS, MC-LMS) and the suppression technology based on space projection of MIMO full duplex radio relay station self feed back Interference Cancellation is studied.MC-LMS algorithm is under SISO LMS algorithm is expanded to MIMO condition, proposes and analyzes at typical case's two kinds of typical mimo channels: Rayleigh channel and Rice channel, the performance difference of lower MC-LMS.Finally obtain the tracking performance of LMS algorithm.On the suppression technology of spatial domain, much the design realizing relay station transmitting filter and receiving filter based on zero forcing algorithm proposition kernel projection sum of subspace shadow casting technique realizes suppressing more completely of self feed back interference.The self feed back perturbation technique of space projection, considers that self feed back interference exists situation about disturbing between signal code and effective to the scene of self feed back interference matrix full rank.Finally compare the self feed back interference time domain cancellation technology and spatial domain suppression technology in full duplex MIMO relay station, and analyze time domain and to offset and spatial domain suppresses combination to realize four kinds of possibilities of self feed back AF panel.
Utility model content
The technical problems to be solved in the utility model is: in order to solve the prior art Problems existing in above-mentioned background technology, provides a kind of full duplex radio relay station self feed back interference suppression equipment.
The utility model solves the technical scheme that its technical problem adopts: a kind of full duplex radio relay station self feed back interference suppression equipment, for receiving filter, transmitting filter and for time domain rejects trap in the relay station that spatial domain suppresses, offset by expansion NLMS and RLS algorithm realization time domain, its spatial domain suppression technology designs receiving filter and the transmitting filter realization of relay station to relay station channel matrix and relay station to subscriber station channel matrix mainly through the self feed back interference channel matrix of priori, source.
Further restriction, the method that interference suppression equipment described in technique scheme adopts is zero forcing algorithm, makes electric-wave filter matrix be orthogonal to self feed back interference matrix filtering self feed back interference.
Further restriction, the method that interference suppression equipment described in technique scheme adopts is least-mean-square error algorithm, makes the relay station Received signal strength of device after filtering and source send mean square error between signal minimum, also needs to know that source arrives the channel of relay station.
Further restriction, the method that interference suppression equipment described in technique scheme adopts is antenna selection strategy, by the impact selecting effective reception antenna and transmitting antenna to reduce self feed back interference.
Further restriction, the method that interference suppression equipment described in technique scheme adopts is beam selection algorithm, selects to make self feed back disturb minimum wave beam to be just received by relay stations or to send by filter.
Further restriction, the method that interference suppression equipment described in technique scheme adopts maximizes subscriber station Received signal strength signal interference ratio algorithm, and the swimming signal that relay station is received and the ratio of interference increase, and can improve the power system capacity of relay station system.
The beneficial effects of the utility model are: a kind of full duplex radio relay station self feed back interference suppression equipment of the present utility model, be applicable to comparatively complicated channel circumstance, the simplicity of design of filter is compact, lower to the degree of dependence of the prior channel information of subscriber station to relay station, relay station to source.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
A kind of full duplex radio relay station of the utility model as shown in Figure 1 self feed back interference suppression equipment, for receiving filter, transmitting filter and for time domain rejects trap in the relay station that spatial domain suppresses, offset by expansion NLMS and RLS algorithm realization time domain, its spatial domain suppression technology designs receiving filter and the transmitting filter realization of relay station to relay station channel matrix and relay station to subscriber station channel matrix mainly through the self feed back interference channel matrix of priori, source.
The method that interference suppression equipment adopts has five kinds, shown in specific as follows:
1, zero forcing algorithm, electric-wave filter matrix is orthogonal to self feed back interference matrix filtering self feed back interference, has comparatively ideal self feed back interference suppressioning effect, but feels simply helpless to more common self feed back interference matrix full rank scene.
2, least-mean-square error algorithm, makes the relay station Received signal strength of device after filtering and source send mean square error between signal minimum, especially also needs to know that source arrives the channel of relay station.
3, antenna selection strategy, by the impact selecting effective reception antenna and transmitting antenna to reduce self feed back interference, is applicable to self feed back and disturbs the scene weakened.
4, beam selection algorithm, select to make self feed back disturb minimum wave beam to be just received by relay stations or to send, but the design of this kind of filter not yet has accurate answer by filter.
5, subscriber station Received signal strength signal interference ratio algorithm is maximized, the swimming signal that relay station is received and the ratio of interference increase, the power system capacity of relay station system can be improved, but do not consider the relay station error rate and need to know that source arrives relay station, relay station to the channel matrix of subscriber station.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on specification, must determine its technical scope according to right.
Claims (6)
1. a full duplex radio relay station self feed back interference suppression equipment, it is characterized in that: for receiving filter, transmitting filter and for time domain rejects trap in the relay station that spatial domain suppresses, offset by expansion NLMS and RLS algorithm realization time domain, its spatial domain suppression technology designs receiving filter and the transmitting filter realization of relay station to relay station channel matrix and relay station to subscriber station channel matrix mainly through the self feed back interference channel matrix of priori, source.
2. a kind of full duplex radio relay station self feed back interference suppression equipment according to claim 1, is characterized in that: the method that described interference suppression equipment adopts is zero forcing algorithm, makes electric-wave filter matrix be orthogonal to self feed back interference matrix filtering self feed back interference.
3. a kind of full duplex radio relay station self feed back interference suppression equipment according to claim 1, it is characterized in that: the method that described interference suppression equipment adopts is least-mean-square error algorithm, make the relay station Received signal strength of device after filtering and source send mean square error between signal minimum, also need to know that source arrives the channel of relay station.
4. a kind of full duplex radio relay station self feed back interference suppression equipment according to claim 1, it is characterized in that: the method that described interference suppression equipment adopts is antenna selection strategy, by the impact selecting effective reception antenna and transmitting antenna to reduce self feed back interference.
5. a kind of full duplex radio relay station self feed back interference suppression equipment according to claim 1, it is characterized in that: the method that described interference suppression equipment adopts is beam selection algorithm, select to make self feed back disturb minimum wave beam to be just received by relay stations or to send by filter.
6. a kind of full duplex radio relay station self feed back interference suppression equipment according to claim 1, it is characterized in that: the method that described interference suppression equipment adopts maximizes subscriber station Received signal strength signal interference ratio algorithm, the swimming signal that relay station is received and the ratio of interference increase, and can improve the power system capacity of relay station system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520316365.5U CN204559615U (en) | 2015-05-13 | 2015-05-13 | A kind of full duplex radio relay station self feed back interference suppression equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520316365.5U CN204559615U (en) | 2015-05-13 | 2015-05-13 | A kind of full duplex radio relay station self feed back interference suppression equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204559615U true CN204559615U (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520316365.5U Expired - Fee Related CN204559615U (en) | 2015-05-13 | 2015-05-13 | A kind of full duplex radio relay station self feed back interference suppression equipment |
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| Country | Link |
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| CN (1) | CN204559615U (en) |
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2015
- 2015-05-13 CN CN201520316365.5U patent/CN204559615U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Device for relay point self feed back interference suppression that full duplex is wireless Effective date of registration: 20170110 Granted publication date: 20150812 Pledgee: Huaxia Bank Limited by Share Ltd Zhongguancun Beijing branch Pledgor: BEIJING BLUE MOUNTAINS TECHNOLOGY CO., LTD. Registration number: 2017990000013 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20180209 Granted publication date: 20150812 Pledgee: Huaxia Bank Limited by Share Ltd Zhongguancun Beijing branch Pledgor: BEIJING BLUE MOUNTAINS TECHNOLOGY CO., LTD. Registration number: 2017990000013 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Device for relay point self feed back interference suppression that full duplex is wireless Effective date of registration: 20190517 Granted publication date: 20150812 Pledgee: Zhongguancun Beijing technology financing Company limited by guarantee Pledgor: BEIJING BLUE MOUNTAINS TECHNOLOGY CO., LTD. Registration number: 2019990000444 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200610 Granted publication date: 20150812 Pledgee: Zhongguancun Beijing technology financing Company limited by guarantee Pledgor: BEIJING BLUE MOUNTAINS TECHNOLOGY Co.,Ltd. Registration number: 2019990000444 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 Termination date: 20210513 |