CN102201835A - Interference cancellation multi-path selection method, device, and interference cancellation system - Google Patents
Interference cancellation multi-path selection method, device, and interference cancellation system Download PDFInfo
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- CN102201835A CN102201835A CN2011101259700A CN201110125970A CN102201835A CN 102201835 A CN102201835 A CN 102201835A CN 2011101259700 A CN2011101259700 A CN 2011101259700A CN 201110125970 A CN201110125970 A CN 201110125970A CN 102201835 A CN102201835 A CN 102201835A
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Abstract
The invention provides a method for performing multi-path selection in an interference cancellation system. The method comprises the following steps of: calculating the current number of a plurality of paths required by interference cancellation, and performing filtering according to a result to obtain the number of the plurality of filtered interference cancellation paths; regulating a current multi-path threshold value according to the number of the plurality of filtered interference cancellation paths and reconstruction capability; and determining the plurality of paths taking part into reconstruction and the interference cancellation in the plurality of paths to be reconstructed according to the current multi-path threshold value. The invention also provides an interference cancellation multi-path selection device and the interference cancellation system. By the interference cancellation multi-path selection method, the interference cancellation multi-path selection device and the interference cancellation system, finite hardware resources can be fully utilized, and interference cancellation gain can be maximized.
Description
Technical field
The present invention relates to the mobile communication technology field, more particularly, relate to method, device and interference cancelling system that a kind of interference eliminated multipath is selected.
Background technology
In the Direct-Spread code division multiple access system, (Pseudorandom Noise, PN) sequence is carried out spread spectrum and scrambling to signal to up employing pseudorandom, with different code channels and the different users who distinguishes same user.Because the influence of factor such as channel fading, the orthogonality between the different users, between same user's the different code channels all can be subjected to destroying to some extent.This makes between the user, has mutual interference between same user's the different code channels.The user of up support is many more, and its interference that is subjected to is just big more concerning some targeted customers.Interference cancellation techniques (Interference Cancellation, IC) at first reconstructing multiple access disturbs, deducting multiple access then from the signal that receives disturbs, eliminate between the user as much as possible, the interference between same user's the different code channels, reduce the suffered interference of targeted customer thereby reach, reach the purpose that improves its signal to interference and noise ratio, thereby can promote the capacity of up-link.
Interference eliminated is in order to reduce targeted customer's visible disturbance, to improve the purpose of its signal to interference and noise ratio.If it is inaccurate that the multiple access of reconstruct disturbs, so not only can't eliminate interference, also can introduce new interference.Therefore, how to guarantee the accuracy of reconstruction result, be related to and obtain interference cancellation gain.
At present, in the interference cancelling system generally all be the information that judges whether reconstruct and this user of counteracting according to user's decode results.If it is correct that the user deciphers back CRC (Cyclic Redundancy Check, cyclic redundancy check (CRC)), then all multipaths of this user all are reconstructed and Interference Cancellation; If the user deciphers the back crc error, then all multipaths of this user are not reconstructed and Interference Cancellation.
Owing to be subjected to the restriction of hardware maximum reconstructed ability, make and treat the scene that the reconstruct multipath is more for some, need treat the multipath of reconstruct and select, just can make the interference cancellation gain maximization.
So, how to make full use of limited hardware resource in the commercial system, make the interference cancellation gain maximization, become a technical problem that must solve.
Summary of the invention
The method, device and the interference cancelling system that the object of the present invention is to provide a kind of interference eliminated multipath to select to make full use of the limited hardware resource, make the interference cancellation gain maximization.
In order to solve above technical problem, the invention provides a kind of method that multipath is selected of in interference cancelling system, carrying out, comprising:
Calculate the multipath bar number that this interference eliminated needs, and carry out filtering, obtain filtered interference eliminated multipath bar number according to the result;
Adjust current multi-path threshold according to filtered interference eliminated multipath bar number and re-configurability;
According to current multi-path threshold, in treating the multipath of reconstruct, determine to participate in the footpath of reconstruct and Interference Cancellation.
Further, the multipath bar number that this interference eliminated of described calculating needs, and carry out filtering according to the result, and obtain filtered interference eliminated multipath bar number, specifically comprise:
Initialization multipath filtering counting FilterFlag;
Calculate the multipath bar number that this interference eliminated needs;
The historical interference eliminated multipath of initialization bar is counted HisICFingerNum, according to the FilterFlag value, carries out multipath filtering, obtains filtered interference eliminated multipath bar number;
The filtered interference eliminated multipath bar numerical value that obtains is composed to historical interference eliminated multipath bar number;
Multipath filtering counting FilterFlag value adds 1.
Further, the multipath bar number that this interference eliminated of described calculating needs specifically comprises:
This interference eliminated multipath bar of initialization is counted CurICFingerNum;
Travel through all users in the grouping bag that current system time gap issues;
According to decoding information detection user's decode results, if decoding failure then continues the next user in the inquiry packets bag; If successfully decoded, then obtain this user before corresponding historical reconstruct multipath bar count TaskFigNum, with CurICFingerNum and TaskFigNum addition, obtain this interference eliminated multipath bar number.
Further, the historical interference eliminated multipath of described initialization bar is counted HisICFingerNum, according to the FilterFlag value, carries out multipath filtering, obtains filtered interference eliminated multipath bar number, specifically comprises:
If the FilterFlag value is zero, then directly this interference eliminated multipath bar is counted the tax of CurICFingerNum value and counted FilterICFingerNum for filtered interference eliminated multipath bar;
If FilterFlag value non-zero then obtains filtered interference eliminated multipath bar number according to given filtering method.
Further, described given filtering method comprises one of following method:
Method one: count HisICFingerNum according to historical interference eliminated multipath bar and obtain filtered interference eliminated multipath bar number;
Method two: according to historical interference eliminated multipath bar count HisICFingerNum and among the Batch that finishes of reconstruct the multipath bar number of reconstruct obtain filtered interference eliminated multipath bar number, specific practice is: this interference eliminated multipath bar number adds historical interference eliminated multipath bar number, deduct the multipath bar number that reconstruct is finished again, obtain filtered interference eliminated multipath bar number.
Further, describedly adjust current multi-path threshold, specifically comprise according to filtered interference eliminated multipath bar number and re-configurability:
Obtain following initiation parameter: the reconstruct multipath selects the minimum M inThld of thresholding, maximum MaxThld, reconstruct multipath that the reconstruct multipath is selected thresholding to select on the thresholding pacing footpath UpStep, reconstruct multipath to select that pacing footpath DownStep, re-configurability MaxFingerNum and current reconstruct multipath select thresholding PathThld and filtered interference eliminated multipath bar to count FilterICFingerNum under the thresholding;
More filtered interference eliminated multipath bar is counted FilterICFingerNum and re-configurability MaxFingerNum, adjusts current multi-path threshold PathThld.
Further, described filtered interference eliminated multipath bar is counted in the comparison of FilterICFingerNum and re-configurability MaxFingerNum, as FilterICFingerNum during greater than MaxFingerNum, compare the relation of PathThld and UpStep sum and MaxThld, adjusted current multi-path threshold PathThld gets the minimum value among both; When FilterICFingerNum is not more than MaxFingerNum, compare PathThld and the difference of DownStep and the relation of MinThld, adjusted current multi-path threshold PathThld gets the maximum among both.
Further, described according to current multi-path threshold, definite footpath that participates in reconstruct and Interference Cancellation in treating the multipath of reconstruct specifically comprises:
The multipath that traversal is treated reconstruct obtains multipath energy PathEnergy;
Relatively the relation between multipath energy PathEnergy and the current multi-path threshold PathThld determines according to comparative result whether this footpath participates in reconstruct and Interference Cancellation;
Treat the reconstruct multipath successively and carry out the multipath selection, obtain the footpath of current all participation reconstruct and Interference Cancellation.
Further, in the comparison of described multipath energy PathEnergy and current multi-path threshold PathThld, if PathEnergy greater than PathThld, then chooses this and directly participates in reconstruct and Interference Cancellation; Otherwise, abandon this footpath, do not participate in reconstruct and Interference Cancellation.
The present invention also provides a kind of interference eliminated multipath choice device, it is characterized in that, comprising: the multipath computing module, and thresholding adjusting module and multipath are selected module,
Described multipath computing module is used for counting filtering according to this interference eliminated multipath bar number and historical interference eliminated multipath bar, obtains filtered interference eliminated multipath bar number;
Described thresholding adjusting module is used for dynamically adjusting multi-path threshold according to filtered interference eliminated multipath bar number and re-configurability;
Described multipath is selected module, is used for determining according to multi-path threshold and the energy for the treatment of the reconstruct footpath whether this footpath is reconstructed and interference eliminated.
Further, described device further comprises the initial configuration module, is used to be configured to down at least one initial parameter: the reconstruct multipath selects the minimum M inThld of thresholding, maximum MaxThld, the reconstruct multipath of reconstruct multipath selection thresholding to select pacing footpath DownStep, re-configurability MaxFingerNum and current reconstruct multipath selection thresholding PathThld under pacing footpath UpStep on the thresholding, the reconstruct multipath selection thresholding.
Further, described multipath computing module comprises the current demand multipath submodule of calculating, calculates historical demand multipath submodule and filtering submodule,
The current demand multipath of described calculating submodule is used for the multipath bar number according to current all the decoding right user correspondences of decode results calculating;
The historical demand multipath of described calculating submodule is used to calculate the filtered interference eliminated multipath of last multipath bar number;
Described filtering submodule is used for calculating this filtered interference eliminated multipath bar number according to filtering method.
The present invention also provides a kind of interference cancelling system, it is characterized in that, comprises decoder, interference eliminated multipath choice device and interference blanking unit, wherein,
Described decoder is used to decipher processing, and decode results is handed down to described interference eliminated multipath choice device;
Described interference eliminated multipath choice device is used for carrying out multipath according to the decode results of described decoder and selects;
Described interference blanking unit is used for the multipath selection result according to interference eliminated multipath choice device, finishes the reconstruct and the Interference Cancellation of multipath.
Compared with prior art, the present invention selects thresholding by the reconstruct multipath, and dynamically adjusts multipath selection thresholding according to the multipath number for the treatment of reconstruct and re-configurability, and a reconstruct and elimination energy are greater than the footpath of multi-path threshold, made full use of the limited hardware resource, made the interference cancellation gain maximization.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes a part of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, does not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is that the embodiment of the invention is carried out the block diagram that multipath is selected in interference cancelling system;
Fig. 2 is that the embodiment of the invention is carried out the flow chart that multipath is selected in interference cancelling system;
Fig. 3 is that the embodiment of the invention is carried out multipath flow chart of interference eliminated multipath bar number after the calculation of filtered when selecting in interference cancelling system;
Fig. 4 is the embodiment of the invention carries out calculating when multipath is selected this interference eliminated multipath bar number in interference cancelling system a flow chart;
Fig. 5 be the embodiment of the invention in interference cancelling system, carry out multipath when selecting according to the relation between interference eliminated multipath bar number and the re-configurability after the filtering, adjust the flow chart that current reconstruct multipath is selected thresholding.
Fig. 6 is the embodiment of the invention is determined the footpath of participation reconstruct and Interference Cancellation in interference cancelling system a flow chart.
Embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer, clear,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Can use relevant parameter in below describing, gather explanation earlier at this:
MinThld: the reconstruct multipath is selected the minimum value of thresholding;
MaxThld: the reconstruct multipath is selected the maximum of thresholding;
PathThld: current reconstruct multipath is selected thresholding;
UpStep: the reconstruct multipath is selected pacing footpath on the thresholding;
DownStep: the reconstruct multipath is selected pacing footpath under the thresholding;
MaxFingerNum: re-configurability;
CurICFingerNum: this interference eliminated multipath bar number:
HisICFingerNum: historical interference eliminated multipath bar number;
FilterICFingerNum: filtered interference eliminated multipath bar number;
PathEnergy: multipath energy;
TaskFigNum: the historical reconstruct multipath of user bar number;
FilterFlag: multipath filtering counting.
As shown in Figure 1, the embodiment of the invention provides a kind of interference cancelling system, and this system 100 comprises decoder 10, interference eliminated multipath choice device 20 and interference blanking unit 30, wherein,
Interference eliminated multipath choice device 20 is used for that decode results according to described decoder is implemented in the calculating that interference cancelling system carries out multipath, the adjustment and the multipath of multi-path threshold selected.
This interference eliminated multipath choice device 20 comprises: initial configuration module 201, and multipath computing module 202, thresholding adjusting module 203 and multipath are selected module 204.
Initial configuration module 201: be used to dispose initial parameter, as MinThld, MaxThld, UpStep, DownStep, MaxFingerNum and PathThld etc.
Multipath computing module 202: be used for counting filtering, obtain filtered interference eliminated multipath bar number according to this interference eliminated multipath bar number and historical interference eliminated multipath bar.This multipath computing module 202 comprises the current demand multipath submodule 2021 of calculating, calculates historical demand multipath submodule 2022 and filtering submodule 2023, wherein, calculate current demand multipath submodule 2021, be used for calculating the multipath bar number of current all decoding right user correspondences according to the decode results of decoder; Calculate historical demand multipath submodule 2022, be used to calculate the filtered interference eliminated multipath of last multipath bar number; Filtering submodule 2023 is used for calculating this filtered interference eliminated multipath bar number according to filtering method.
Thresholding adjusting module 203: be used for dynamically adjusting multi-path threshold according to the relation between filtered interference eliminated multipath bar number and the re-configurability.
Multipath is selected module 204: be used for according to multi-path threshold and treat relation between the energy in reconstruct footpath, determine whether this footpath is reconstructed and interference eliminated.
As shown in Figure 2, the embodiment of the invention provides a kind of method that multipath is selected of carrying out in interference cancelling system, comprising:
Step 2.A. initialization multipath filtering counting FilterFlag;
Step 2.B. calculates the multipath bar number that this interference eliminated needs.As shown in Figure 4, step 2.B specifically comprises:
This interference eliminated multipath bar of step 2.B.A. initialization is counted CurICFingerNum;
Step 2.B.B. travels through all users in grouping (Batch) bag that current system time gap issues;
The decoding information that step 2.B.C. issues according to decoder detects this user's decode results, if successfully decoded, then enters next step, if decoding failure then turns back to step 2.B.B and inquires about next user;
Corresponding historical reconstruct multipath bar was counted TaskFigNum before step 2.B.D. obtained this user;
Step 2.B.E. obtains this interference eliminated multipath bar number with CurICFingerNum and TaskFigNum addition.
The historical interference eliminated multipath of step 2.C. initialization bar is counted HisICFingerNum, according to the FilterFlag value, carries out multipath filtering, obtains filtered interference eliminated multipath bar number.Specifically comprise:
Step 2.C.A. then directly counts this interference eliminated multipath bar the tax of CurICFingerNum value and counts FilterICFingerNum for filtered interference eliminated multipath bar if the FilterFlag value is zero;
Step 2.C.B. is if FilterFlag value non-zero then obtains filtered interference eliminated multipath bar number according to given filtering method.Here list two kinds of multipath filtering methods:
Method one: count HisICFingerNum according to historical interference eliminated multipath bar and obtain filtered interference eliminated multipath bar number.Set a filter factor ALPHA, this coefficient can require to choose according to actual performance.Then:
FilterICFingerNum＝(1-ALPHA)*HisICFingerNum+ALPHA*CurICFingerNum
Method two: according to historical interference eliminated multipath bar count HisICFingerNum and among the Batch that finishes of reconstruct the multipath bar number of reconstruct obtain filtered interference eliminated multipath bar number.Specific practice is: this interference eliminated multipath bar number adds historical interference eliminated multipath bar number, deducts the multipath bar number that reconstruct is finished again, obtains filtered interference eliminated multipath bar number.
Step 2.D. counts the tax of FilterICFingerNum value to the filtered interference eliminated multipath bar that calculates and counts HisICFingerNum for historical interference eliminated multipath bar.
Step 2.E. multipath filtering counting FilterFlag value adds 1.
The relation that step 3. is counted between FilterICFingerNum and the re-configurability MaxFingerNum according to filtered interference eliminated multipath bar is adjusted current multi-path threshold PathThld.As shown in Figure 5, this step specifically comprises:
Step 3.A. obtains MinThld from initial configuration module 201, MaxThld, UpStep, DownStep, MaxFingerNum.Filtering submodule from multipath computing module 202 obtains filtered interference eliminated multipath bar and counts FilterICFingerNum;
The more filtered interference eliminated multipath of step 3.B. bar is counted the relation between FilterICFingerNum and the re-configurability MaxFingerNum, adjusts current multi-path threshold PathThld.Specifically comprise:
As FilterICFingerNum during greater than MaxFingerNum, relatively (PathThld+UpStep) and with the relation of MaxThld, adjusted current multi-path threshold PathThld gets the minimum value among both.
When FilterICFingerNum is not more than MaxFingerNum, compare the difference of (PathThld-DownStep) and the relation of MinThld, adjusted current multi-path threshold PathThld gets the maximum among both.
The multipath that step 4.A. traversal is treated reconstruct obtains multipath energy PathEnergy;
Step 4.B. compares the relation between multipath energy PathEnergy and the current multi-path threshold PathThld, determines according to comparative result whether this footpath participates in reconstruct and Interference Cancellation.Concrete grammar comprises:
If PathEnergy greater than PathThld, then chooses this and directly participates in reconstruct and Interference Cancellation;
If PathEnergy less than PathThld, abandons this footpath, do not participate in reconstruct and Interference Cancellation.
Step 4.C. treats the reconstruct multipath successively and carries out the multipath selection, can obtain the footpath of current all participation reconstruct and Interference Cancellation at last, gives interference blanking unit with the multipath selection result, and flow process finishes.
Above-mentioned explanation illustrates and has described a preferred embodiment of the present invention, but as previously mentioned, be to be understood that the present invention is not limited to the disclosed form of this paper, should not regard eliminating as to other embodiment, and can be used for various other combinations, modification and environment, and can in invention contemplated scope described herein, change by the technology or the knowledge of above-mentioned instruction or association area.And change that those skilled in the art carried out and variation do not break away from the spirit and scope of the present invention, then all should be in the protection range of claims of the present invention.
Claims (13)
1. one kind is carried out the method that multipath is selected in interference cancelling system, it is characterized in that, comprising:
Calculate the multipath bar number that this interference eliminated needs, and carry out filtering, obtain filtered interference eliminated multipath bar number according to the result;
Adjust current multi-path threshold according to filtered interference eliminated multipath bar number and re-configurability;
According to current multi-path threshold, in treating the multipath of reconstruct, determine to participate in the footpath of reconstruct and Interference Cancellation.
2. the method for claim 1 is characterized in that, the multipath bar number that this interference eliminated of described calculating needs, and carry out filtering according to the result, and obtain filtered interference eliminated multipath bar number, specifically comprise:
Initialization multipath filtering counting FilterFlag;
Calculate the multipath bar number that this interference eliminated needs;
The historical interference eliminated multipath of initialization bar is counted HisICFingerNum, according to the FilterFlag value, carries out multipath filtering, obtains filtered interference eliminated multipath bar number;
The filtered interference eliminated multipath bar numerical value that obtains is composed to historical interference eliminated multipath bar number;
Multipath filtering counting FilterFlag value adds 1.
3. method as claimed in claim 2 is characterized in that, the multipath bar number that this interference eliminated of described calculating needs specifically comprises:
This interference eliminated multipath bar of initialization is counted CurICFingerNum;
Travel through all users in the grouping bag that current system time gap issues;
According to decoding information detection user's decode results, if decoding failure then continues the next user in the inquiry packets bag; If successfully decoded, then obtain this user before corresponding historical reconstruct multipath bar count TaskFigNum, with CurICFingerNum and TaskFigNum addition, obtain this interference eliminated multipath bar number.
4. method as claimed in claim 3 is characterized in that, the historical interference eliminated multipath of described initialization bar is counted HisICFingerNum, according to the FilterFlag value, carries out multipath filtering, obtains filtered interference eliminated multipath bar number, specifically comprises:
If the FilterFlag value is zero, then directly this interference eliminated multipath bar is counted the tax of CurICFingerNum value and counted FilterICFingerNum for filtered interference eliminated multipath bar;
If FilterFlag value non-zero then obtains filtered interference eliminated multipath bar number according to given filtering method.
5. method as claimed in claim 4 is characterized in that, described given filtering method comprises one of following method:
Method one: count HisICFingerNum according to historical interference eliminated multipath bar and obtain filtered interference eliminated multipath bar number;
Method two: according to historical interference eliminated multipath bar count HisICFingerNum and among the Batch that finishes of reconstruct the multipath bar number of reconstruct obtain filtered interference eliminated multipath bar number, specific practice is: this interference eliminated multipath bar number adds historical interference eliminated multipath bar number, deduct the multipath bar number that reconstruct is finished again, obtain filtered interference eliminated multipath bar number.
6. the method for claim 1 is characterized in that, describedly adjusts current multi-path threshold according to filtered interference eliminated multipath bar number and re-configurability, specifically comprises:
Obtain following initiation parameter: the reconstruct multipath selects the minimum M inThld of thresholding, maximum MaxThld, reconstruct multipath that the reconstruct multipath is selected thresholding to select on the thresholding pacing footpath UpStep, reconstruct multipath to select that pacing footpath DownStep, re-configurability MaxFingerNum and current reconstruct multipath select thresholding PathThld and filtered interference eliminated multipath bar to count FilterICFingerNum under the thresholding;
More filtered interference eliminated multipath bar is counted FilterICFingerNum and re-configurability MaxFingerNum, adjusts current multi-path threshold PathThld.
7. method as claimed in claim 6, it is characterized in that, described filtered interference eliminated multipath bar is counted in the comparison of FilterICFingerNum and re-configurability MaxFingerNum, as FilterICFingerNum during greater than MaxFingerNum, compare the relation of PathThld and UpStep sum and MaxThld, adjusted current multi-path threshold PathThld gets the minimum value among both; When FilterICFingerNum is not more than MaxFingerNum, compare PathThld and the difference of DownStep and the relation of MinThld, adjusted current multi-path threshold PathThld gets the maximum among both.
8. the method for claim 1 is characterized in that, and is described according to current multi-path threshold, determines to participate in the footpath of reconstruct and Interference Cancellation in treating the multipath of reconstruct, specifically comprises:
The multipath that traversal is treated reconstruct obtains multipath energy PathEnergy;
Relatively the relation between multipath energy PathEnergy and the current multi-path threshold PathThld determines according to comparative result whether this footpath participates in reconstruct and Interference Cancellation;
Treat the reconstruct multipath successively and carry out the multipath selection, obtain the footpath of current all participation reconstruct and Interference Cancellation.
9. method as claimed in claim 8 is characterized in that, in the comparison of described multipath energy PathEnergy and current multi-path threshold PathThld, if PathEnergy greater than PathThld, then chooses this and directly participates in reconstruct and Interference Cancellation; Otherwise, abandon this footpath, do not participate in reconstruct and Interference Cancellation.
10. an interference eliminated multipath choice device is characterized in that, comprising: the multipath computing module, and thresholding adjusting module and multipath are selected module,
Described multipath computing module is used for counting filtering according to this interference eliminated multipath bar number and historical interference eliminated multipath bar, obtains filtered interference eliminated multipath bar number;
Described thresholding adjusting module is used for dynamically adjusting multi-path threshold according to filtered interference eliminated multipath bar number and re-configurability;
Described multipath is selected module, is used for determining according to multi-path threshold and the energy for the treatment of the reconstruct footpath whether this footpath is reconstructed and interference eliminated.
11. device as claimed in claim 10, it is characterized in that, described device further comprises the initial configuration module, is used to be configured to down at least one initial parameter: the reconstruct multipath selects the minimum M inThld of thresholding, maximum MaxThld, the reconstruct multipath of reconstruct multipath selection thresholding to select pacing footpath DownStep, re-configurability MaxFingerNum and current reconstruct multipath selection thresholding PathThld under pacing footpath UpStep on the thresholding, the reconstruct multipath selection thresholding.
12. device as claimed in claim 10 is characterized in that, described multipath computing module comprises the current demand multipath submodule of calculating, calculates historical demand multipath submodule and filtering submodule,
The current demand multipath of described calculating submodule is used for the multipath bar number according to current all the decoding right user correspondences of decode results calculating;
The historical demand multipath of described calculating submodule is used to calculate the filtered interference eliminated multipath of last multipath bar number;
Described filtering submodule is used for calculating this filtered interference eliminated multipath bar number according to filtering method.
13. an interference cancelling system is characterized in that, comprises decoder, interference eliminated multipath choice device and interference blanking unit, wherein,
Described decoder is used to decipher processing, and decode results is handed down to described interference eliminated multipath choice device;
Described interference eliminated multipath choice device is used for carrying out multipath according to the decode results of described decoder and selects;
Described interference blanking unit is used for the multipath selection result according to interference eliminated multipath choice device, finishes the reconstruct and the Interference Cancellation of multipath.
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| CN112311704A (en) * | 2020-11-02 | 2021-02-02 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Interference cancellation type channel estimation optimization method and system |
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