CN101860884B - Shared-frequency neighboring cell channel estimation method and device - Google Patents
Shared-frequency neighboring cell channel estimation method and device Download PDFInfo
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- CN101860884B CN101860884B CN 201010174509 CN201010174509A CN101860884B CN 101860884 B CN101860884 B CN 101860884B CN 201010174509 CN201010174509 CN 201010174509 CN 201010174509 A CN201010174509 A CN 201010174509A CN 101860884 B CN101860884 B CN 101860884B
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Abstract
The invention provides a shared-frequency neighboring cell channel estimation method and a shared-frequency neighboring cell channel estimation device, which belong to the technical field of channel estimation. The method comprises the following steps of: comparing the configuration of shared-frequency neighboring cells of a service cell with that of a local anomalous shared-frequency neighboring cell, and judging whether the shared-frequency neighboring cells comprise the anomalous shared-frequency neighboring cell; if the shared-frequency neighboring cells comprise the anomalous shared-frequency neighboring cell, adjusting serial iteration interference elimination priorities in the shared-frequency neighboring cell channel estimation; and if the shared-frequency neighboring cells do not comprise the anomalous shared-frequency neighboring cell, performing serial iteration interference elimination according to the interference elimination priorities in the shared-frequency neighboring cell channel estimation and from higher signal intensity to lower signal intensity, thereby improving the channel estimation accuracy of the service neighboring cell.
Description
Technical field
The invention belongs to the channel estimation technique field; Relate in particular to the method and the device of the co-frequency neighbor cell channel estimating of a kind of TD-SCDMA of being applicable to (TimeDivision-Synchronous Code Division Multiple Access, TD SDMA) network.
Background technology
Along with development of wireless communication devices and 3G (3G (Third Generation) Moblie) rise in the world, make Radio Resource become more and more deficienter.For the TD-SCDMA system of one of 3G mainstream standard, the Radio Resource that can be assigned with also is very limited.In order to improve the availability of frequency spectrum of TD-SCDMA system, identical networking is kind of an effective solution.But identical networking also can bring with disturbing frequently when improving spectrum efficiency.
At present, the TD-SCDMA system adopts joint detection algorithm to accomplish the demodulation of user data.Use the channel impulse response that joint detection algorithm need estimate each user exactly.Usually the TD-SCDMA system utilizes training sequence (being the Midamble sign indicating number) to accomplish channel estimating.Channel estimating during to identical networking generally can adopt the serial interference algorithm that disappears mutually, and the normal channel estimation approach comprises the steps:
Step 1, calculate the channel impulse response of the same frequency abutting subdistrict of Serving cell and this Serving cell;
Step 2, select one or several maximum diameter, and note the position and the numerical value in footpath, in all sub-districts, deduct the influence of maximum diameter at last; Maximum diameter is meant in Serving cell and the adjacent sub-district, some paths that power is stronger.
Step 3, repeating step 2 are up to satisfying predetermined condition.This predetermined condition can be that iterations reaches pre-determined number, or maximum diameter is less than predetermined threshold value;
Step 4, with the position and the numerical value of all maximum diameters, the channel impulse response after executing with step 3 is superimposed, the channel impulse response behind the counteracting serial interference to the end.
But said method can lose efficacy under certain conditions.For example under the configuration of some Serving cell and co-frequency neighbor cell; The channel impulse response power of the original channel impulse response power ratio Serving cell of co-frequency neighbor cell is also big; But the actual signal that on co-frequency neighbor cell, do not send, therefore above-mentioned normal channel method of estimation can not be carried out channel estimating accurately.
Summary of the invention
In order to address the above problem, to the purpose of this invention is to provide a kind of method and device of co-frequency neighbor cell channel estimating, thereby improve the accuracy that the service adjacent cell channel is estimated.
In order to achieve the above object, the present invention provides a kind of method of co-frequency neighbor cell channel estimating, and said method comprises:
The configuration of the co-frequency neighbor cell of the Serving cell configuration with local unusual co-frequency neighbor cell is compared, judge whether there is unusual co-frequency neighbor cell in the said co-frequency neighbor cell;
If when having unusual co-frequency neighbor cell in the said co-frequency neighbor cell, the priority of serial iteration interference eliminated during adjustment co-frequency neighbor cell channel estimating;
If when not having unusual co-frequency neighbor cell in the said co-frequency neighbor cell, the interference eliminated order of co-frequency neighbor cell channel estimating is accomplished the serial iteration interference eliminated according to signal strength signal intensity order from big to small.
Preferably, the configuration of said co-frequency neighbor cell with Serving cell compares with the configuration of local unusual co-frequency neighbor cell, judges whether exist the step of unusual co-frequency neighbor cell to comprise in the co-frequency neighbor cell:
According to the cell id of said Serving cell, find out the cell id that said Serving cell is caused the adjacent sub-district of interference;
Cell id according to said adjacent sub-district; Retrieve in the co-frequency neighbor cell that in said Serving cell, disposes; If the co-frequency neighbor cell corresponding with the cell id of said adjacent sub-district arranged, there is said unusual co-frequency neighbor cell in the then said co-frequency neighbor cell in said co-frequency neighbor cell.
Preferably, said method also comprises:
When a transmitting terminal configuration service sub-district; Do not dispose co-frequency neighbor cell; And when receiving terminal configuration co-frequency neighbor cell,, obtain power ratio with the maximal window power of the CHE initial channel estimation of the co-frequency neighbor cell of receiving terminal configuration maximal window power divided by the CHE of said Serving cell;
If said power ratio is during greater than preset power threshold, the co-frequency neighbor cell of said receiving terminal configuration is labeled as unusual co-frequency neighbor cell.
Preferably, if when having unusual co-frequency neighbor cell in the said said co-frequency neighbor cell, the step of the priority of serial iteration interference eliminated comprises during adjustment co-frequency neighbor cell channel estimating:
When having unusual co-frequency neighbor cell in the said co-frequency neighbor cell, the order of having accomplished N serial iteration interference eliminated need satisfy following condition: preceding N bar directly belongs to Serving cell and needs carry out the serial iteration interference eliminated by signal strength signal intensity order from big to small;
After N serial iteration interference eliminated of completion; Remaining (M-N) inferior serial iteration interference eliminated comprises in all co-frequency neighbor cells of said Serving cell; Eliminate by signal strength signal intensity order from big to small, wherein M representes: total serial interference iterations of setting.
The present invention also provides a kind of device of co-frequency neighbor cell channel estimating, and said device comprises:
Unusual co-frequency neighbor cell detection module is used for the configuration of the co-frequency neighbor cell of the Serving cell configuration with local unusual co-frequency neighbor cell is compared, and judges whether there is unusual co-frequency neighbor cell in the said co-frequency neighbor cell;
Channel estimation module is used for when if there is unusual co-frequency neighbor cell in said co-frequency neighbor cell the priority of serial iteration interference eliminated during adjustment co-frequency neighbor cell channel estimating; Perhaps, if when not having unusual co-frequency neighbor cell in the said co-frequency neighbor cell, the interference eliminated order of co-frequency neighbor cell channel estimating is accomplished the serial iteration interference eliminated according to signal strength signal intensity order from big to small.
Preferably, said channel estimation module comprises: channel estimating selected cell, normal channel estimation unit and unusual channel estimating unit, wherein
Said channel estimating selected cell is used for the judged result according to said unusual co-frequency neighbor cell detection module, triggers said normal channel estimation unit or unusual channel estimating unit;
Said normal channel estimation unit when being used for judged result at said channel estimating selected cell and being said co-frequency neighbor cell and not having unusual co-frequency neighbor cell, is accomplished the serial iteration interference eliminated according to signal strength signal intensity order from big to small;
Said unusual channel estimating unit; When being used for judged result at said channel estimating selected cell and being said co-frequency neighbor cell and having unusual co-frequency neighbor cell, preceding N bar directly belongs to said Serving cell and need carry out the serial iteration interference eliminated by signal strength signal intensity order from big to small; After N serial iteration interference eliminated of completion; Remaining (M-N) inferior serial iteration interference eliminated is in comprising all co-frequency neighbor cells of said Serving cell; Eliminate by signal strength signal intensity order from big to small, wherein M representes: total serial interference iterations of setting.
Preferably, said unusual co-frequency neighbor cell detection module comprises:
Co-frequency neighbor cell initial channel estimation unit is used for only disposing said Serving cell when transmitting terminal, does not dispose said co-frequency neighbor cell, and when receiving terminal disposes said co-frequency neighbor cell, accomplishes the initial channel estimation of co-frequency neighbor cell;
The maximal window power cell of statistics co-frequency neighbor cell is used for finding out maximal window power separately at each co-frequency neighbor cell;
The power ratio comparing unit is used for maximal window power with the co-frequency neighbor cell of receiving terminal configuration divided by said Serving cell maximal window power, obtain power ratio, and the said power ratio that will obtain compares with preset power threshold;
If unusual co-frequency neighbor cell record cell is used for said power ratio during greater than said preset power threshold, and the co-frequency neighbor cell of said receiving terminal configuration is recorded as unusual co-frequency neighbor cell.
Preferably, said unusual co-frequency neighbor cell detection module also comprises:
The statistics number judging unit is used to judge whether to accomplish the statistics of all unusual co-frequency cells.
Preferably, said unusual co-frequency neighbor cell detection module is used for the cell id according to said Serving cell, finds out the cell id that said Serving cell is caused the adjacent sub-district of interference; And according to the cell id of said adjacent sub-district; In the co-frequency neighbor cell of said Serving cell configuration, retrieve; If the co-frequency neighbor cell corresponding with the cell id of said adjacent sub-district arranged, there is said unusual co-frequency neighbor cell in the then said co-frequency neighbor cell in said co-frequency neighbor cell.
Can know by technique scheme, at first the configuration of co-frequency neighbor cell in the Serving cell configuration with local unusual co-frequency neighbor cell compared, judge whether there is unusual co-frequency neighbor cell in the co-frequency neighbor cell; If when having unusual co-frequency neighbor cell in the co-frequency neighbor cell, the priority of serial iteration interference eliminated during adjustment co-frequency neighbor cell channel estimating; If when not having unusual co-frequency neighbor cell in the co-frequency neighbor cell; The interference eliminated order of co-frequency neighbor cell channel estimating; Accomplish the serial iteration interference eliminated according to signal strength signal intensity order from big to small,, thereby improve the accuracy that the service adjacent cell channel is estimated through the employing technique scheme.
Description of drawings
Fig. 1 is the method flow diagram of co-frequency neighbor cell channel estimating in the embodiments of the invention;
Fig. 2 is the method flow diagram that unusual co-frequency neighbor cell detects in the embodiments of the invention;
Fig. 3 is the apparatus structure block diagram of co-frequency neighbor cell channel estimating in the embodiments of the invention;
Fig. 4 is the structured flowchart of unusual co-frequency neighbor cell detection module in the embodiments of the invention;
Fig. 5 is the structured flowchart of channel estimation module in the embodiments of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer,, the embodiment of the invention is done explanation in further detail below in conjunction with embodiment and accompanying drawing.At this, illustrative examples of the present invention and explanation are used to explain the present invention, but not as to qualification of the present invention.
Referring to Fig. 1, be the method flow diagram of co-frequency neighbor cell channel estimating in the embodiments of the invention, concrete steps are following:
In the present embodiment, can judge whether co-frequency neighbor cell exists unusually according to predetermined rule, this predetermined rule can be arranged to: at first according to the cell id of Serving cell, find out and possibly cause the cell id of the adjacent sub-district of interference to this Serving cell; Then according to the cell id of the adjacent sub-district that finds out; In the co-frequency neighbor cell of configuration, retrieve; If the co-frequency neighbor cell corresponding with the cell id of this neighbour sub-district arranged in co-frequency neighbor cell; Then there is unusual co-frequency neighbor cell in the co-frequency neighbor cell, otherwise, there is not unusual co-frequency neighbor cell in this co-frequency neighbor cell.
In the present embodiment, the cell id to the adjacent sub-district that possibly cause unusual interference can be obtained by algorithm simulating in advance.For example when a transmitting terminal configuration service sub-district; Do not dispose co-frequency neighbor cell; And when receiving terminal configuration co-frequency neighbor cell; With the maximal window power of the initial CHE (Channel Estimation, channel estimating) of the co-frequency neighbor cell of receiving terminal configuration maximal window power, obtain power ratio R divided by the initial CHE of Serving cell; If power ratio R is during greater than preset power threshold T, the co-frequency neighbor cell of receiving terminal configuration is labeled as unusual co-frequency neighbor cell, for example can the cell id of this co-frequency neighbor cell be recorded in the unusual co-frequency neighbor cell list; Otherwise can in unusual co-frequency neighbor cell list, ignore this group cell configuration.
Can know that through simulation calculation this preset power threshold T is usually greater than 0.7, this T value needs to consider the influence that decline that actual environment is central and noise bring.
In the present embodiment, because the correlation difference of different Midamble interblocks, under the different Midamble configuration of transmitting terminal, power threshold T preset in the unusual co-frequency neighbor cell list also can be different.
In the present embodiment; When the configuration of co-frequency neighbor cell belonged to the unusual co-frequency neighbor cell of this locality, the order of having accomplished N serial iteration interference eliminated need satisfy following condition: preceding N bar directly belongs to Serving cell and needs carry out the serial iteration interference eliminated by signal strength signal intensity order from big to small; After N serial iteration interference eliminated of completion, remaining (M-N) inferior serial iteration interference eliminated is eliminated by signal strength signal intensity order from big to small in all co-frequency neighbor cells, and wherein M representes: total serial interference iterations.The footpath number that Serving cell has been accomplished N serial iteration interference eliminated footpath is relevant with the power ratio R of the initial channel estimation of the initial channel estimation of co-frequency neighbor cell and Serving cell.
The concrete steps of the adjustment co-frequency neighbor cell channel estimating in the step 102 are following:
Step (1), calculate the channel impulse response of the same frequency abutting subdistrict of Serving cell and this Serving cell;
Step (2), from Serving cell, select a maximum diameter, and note the position and the numerical value of selected maximum diameter, in all sub-districts, deduct the influence of selected maximum diameter at last;
Above-mentioned maximum diameter is meant the strongest footpath of power in Serving cell.
Step (3), repeating step (2) several times;
For example repeating step (2) is N time, selects a maximum diameter at every turn, after N time, can obtain N bar maximum diameter.
Step (4), from all sub-districts, select the footpath of a maximum, and note the position and the numerical value of selected maximum diameter, in all sub-districts, deduct the influence of selected maximum diameter at last.
Step (5), repeating step (4) repeatedly are up to satisfying predetermined condition.
In step (2)～(5), the selection of each maximum diameter, the position can not be repeated.For example: primary maximum diameter is chosen as first footpath, and so secondary maximum diameter is selected, and the position should be that selection is maximum, later similar in other footpaths except that first footpath.
Above-mentioned predetermined condition can be the iterations that reaches predetermined, or maximum diameter is less than preset threshold value.
Step (6), with the position and the numerical value of all maximum diameters, the channel impulse response after executing with step (5) is superimposed, the channel impulse response behind the counteracting serial interference to the end.
After executing above-mentioned steps (1)～step (6), continue execution in step 103;
In the present embodiment; If when the configuration of co-frequency neighbor cell does not belong to local unusual co-frequency neighbor cell, can adopt normal channel to estimate, just in all co-frequency cells, find out M bar maximum diameter; M bar maximum diameter is sorted according to power from big to small; According to power from big to small, accomplish many sub-districts serial iteration interference eliminated M time, concrete steps are following:
Step (1), calculate the channel impulse response of the same frequency abutting subdistrict of Serving cell and this Serving cell;
Step (2), select a maximum diameter, and note the position and the numerical value of maximum diameter, in all sub-districts, deduct the influence of selected maximum diameter at last;
Step (3), repeating step (2) repeatedly are up to satisfying predetermined condition.
For example repeating step (2) is M time, selects a maximum diameter at every turn, after M time, can obtain M bar maximum diameter.
For step (2)～(3), annotate: the selection of each maximum diameter, the position can not be repeated.For example: primary maximum diameter is chosen as first footpath, and so secondary maximum diameter is selected, and the position should be that selection is maximum, later similar in other footpaths except that first footpath.
Predetermined condition can be the iterations that reaches predetermined, or maximum diameter is less than threshold value;
Step (4), with the position and the numerical value of all maximum diameters, the channel impulse response after executing with step (3) is superimposed, the channel impulse response behind the counteracting serial interference to the end.
Can know by technique scheme, at first the configuration of co-frequency neighbor cell in the Serving cell configuration with local unusual co-frequency neighbor cell compared, judge whether there is unusual co-frequency neighbor cell in this co-frequency neighbor cell; If when having unusual co-frequency neighbor cell in the co-frequency neighbor cell, the priority of serial iteration interference eliminated during adjustment co-frequency neighbor cell channel estimating; If when not having unusual co-frequency neighbor cell in the co-frequency neighbor cell; The interference eliminated order of co-frequency neighbor cell channel estimating; Accomplish the serial iteration interference eliminated according to signal strength signal intensity order from big to small,, can improve the accuracy that the service adjacent cell channel is estimated through adopting technique scheme.
Referring to Fig. 2, be the method flow diagram that unusual co-frequency neighbor cell in the embodiments of the invention detects, concrete steps are following:
The initial channel estimation of step 201, co-frequency neighbor cell;
When transmitting terminal configuration service sub-district, do not dispose co-frequency neighbor cell, and during receiving terminal configuration co-frequency neighbor cell, accomplish the initial channel estimation of co-frequency neighbor cell;
The cell id of step 204, record co-frequency neighbor cell;
Just, can the cell id of the co-frequency neighbor cell of above-mentioned receiving terminal configuration be recorded in the unusual co-frequency neighbor cell list, for example can basic Midamble number of this co-frequency neighbor cell be recorded in the unusual co-frequency neighbor cell list.
In order to realize above-mentioned method embodiment, other embodiment of the present invention also provide a kind of device of co-frequency neighbor cell channel estimating.What need at first explanation in addition is; Because following embodiment is for realizing aforesaid method embodiment; So this device all is to establish for each step that realizes preceding method; But the present invention is not limited to following embodiment, and any device of said method and module of realizing all should be contained in protection scope of the present invention.And in the following description, the content identical with preceding method omitted at this, to practice thrift length.
Referring to Fig. 3, be the apparatus structure block diagram of co-frequency neighbor cell channel estimating in the embodiments of the invention, this device comprises:
Unusual co-frequency neighbor cell detection module 31 is used for the configuration of the co-frequency neighbor cell of the Serving cell configuration with local unusual co-frequency neighbor cell is compared, and judges whether there is unusual co-frequency neighbor cell in the co-frequency cell;
In the present embodiment, can judge whether co-frequency neighbor cell exists unusually according to predetermined rule, this predetermined rule can be arranged to: at first according to the cell id of Serving cell, find out the cell id that Serving cell is caused the adjacent sub-district of interference; Then according to the cell id of adjacent sub-district; In the co-frequency neighbor cell of configuration, retrieve; If the co-frequency neighbor cell corresponding with the cell id of this neighbour sub-district arranged, then there is unusual co-frequency neighbor cell in the co-frequency neighbor cell, this unusual co-frequency neighbor cell detection module 31 output abnormalities indication this moment in co-frequency neighbor cell; Otherwise the normal indication of output.
In the present embodiment, possibly cause the adjacent cell id of unusual interference to obtain in advance to Serving cell by algorithm simulating.When transmitting terminal does not comprise the co-frequency neighbor cell setting and only comprises Serving cell; But when receiving terminal disposes co-frequency neighbor cell; The initial CHE of the co-frequency neighbor cell of receiving terminal configuration and the power ratio of this cell initial CHE are designated as R; If R＞T (T can represent the uncorrelated degree between the Midamble code character in the co-frequency cell) includes co-frequency neighbor cell in unusual co-frequency cell tabulation so, otherwise in unusual co-frequency cell tabulation, ignores this group cell configuration).
In the present embodiment, channel estimation module 32 judges that according to the result of unusual co-frequency neighbor cell detection module 31 next step uses normal channel to estimate, also is to use unusual channel estimating.If do not comprise unusual co-frequency neighbor cell in the co-frequency neighbor cell, get into normal channel so and estimate; Otherwise, carry out unusual channel estimating.
Referring to Fig. 4, be the structured flowchart of unusual co-frequency neighbor cell detection module in the embodiments of the invention, this unusual co-frequency neighbor cell detection module 31 comprises:
Co-frequency neighbor cell initial channel estimation unit 311 is used for not disposing co-frequency neighbor cell when a transmitting terminal configuration service sub-district, and when receiving terminal configuration co-frequency neighbor cell, accomplishes the initial channel estimation of co-frequency neighbor cell;
The maximal window power cell 312 of statistics co-frequency neighbor cell is used for finding out maximal window power separately at each co-frequency neighbor cell;
Power ratio comparing unit 313 is used for maximal window power with the co-frequency neighbor cell of receiving terminal configuration divided by Serving cell maximal window power, obtains power ratio R, and power ratio R that obtains and preset power threshold T are compared;
If unusual co-frequency neighbor cell record cell 314 is used for power ratio R during greater than preset power threshold T, and the co-frequency neighbor cell of receiving terminal configuration is recorded as unusual co-frequency neighbor cell.
In another embodiment of the present invention, this unusual co-frequency neighbor cell detection module 31 also comprises:
Statistics number judging unit 315 is used to judge whether to accomplish the statistics of all unusual co-frequency cells, if do not have, then triggers co-frequency neighbor cell initial channel estimation unit 311.
Referring to Fig. 5, be the structured flowchart of channel estimation module in the embodiments of the invention, this channel estimation module 32 comprises: channel estimating selected cell 321, normal channel estimation unit 322 and unusual channel estimating unit 323, wherein
Channel estimating selected cell 321 is used for the judged result according to unusual co-frequency neighbor cell detection module 31, triggers normal channel estimation unit 322 or unusual channel estimating unit 323;
Normal channel estimation unit 322 when being used for judged result at channel estimating selected cell 321 and being co-frequency neighbor cell and not having unusual co-frequency neighbor cell, is accomplished the serial iteration interference eliminated according to signal strength signal intensity order from big to small;
In the present embodiment; Normal channel estimation unit 322 specifically is used to carry out following steps: (1) calculates the channel impulse response of Serving cell and its same frequency abutting subdistrict; (2) select the footpath of a maximum; And note position and numerical value directly, in all sub-districts, deduct the influence in these several footpaths at last.(3) repetitive process (2) repeatedly is up to satisfying the iterations of setting.(4) with the position and the numerical value of all maximum diameters, the channel impulse response after executing with (3) step is superimposed, the channel impulse response behind the counteracting serial interference to the end.
Unusual channel estimating unit 323; When being used for judged result at channel estimating selected cell 321 and being co-frequency neighbor cell and having unusual co-frequency neighbor cell, preceding N bar directly belongs to Serving cell and need carry out the serial iteration interference eliminated by signal strength signal intensity order from big to small; After N serial iteration interference eliminated of completion; Remaining (M-N) inferior serial iteration interference eliminated is in comprising all co-frequency neighbor cells of Serving cell; Eliminate by signal strength signal intensity order from big to small, wherein M representes: total serial interference iterations of setting.
In the present embodiment; Unusual channel estimating unit 323 specifically is used to carry out following steps: (1) calculates the channel impulse response of Serving cell and its same frequency abutting subdistrict; (2) from Serving cell, select the footpath of a maximum; And note position and numerical value directly, in all sub-districts, deduct the influence in these several footpaths.(3) repetitive process (2) several times are up to satisfying preset number of times.(4) from all sub-districts, select the footpath of a maximum, and note the position and the numerical value in footpath, in all sub-districts, deduct the influence in these several footpaths at last.(5) repetitive process (4) repeatedly is up to satisfying the iterations of setting.(6) with the position and the numerical value of all maximum diameters, the channel impulse response after executing with (5) step is superimposed, the channel impulse response behind the counteracting serial interference to the end.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (9)
1. the method for a co-frequency neighbor cell channel estimating is characterized in that, said method comprises:
The configuration of the co-frequency neighbor cell of the Serving cell configuration with local unusual co-frequency neighbor cell is compared, judge whether there is unusual co-frequency neighbor cell in the said co-frequency neighbor cell;
If when having unusual co-frequency neighbor cell in the said co-frequency neighbor cell, the priority of serial iteration interference eliminated during adjustment co-frequency neighbor cell channel estimating;
If when not having unusual co-frequency neighbor cell in the said co-frequency neighbor cell, the interference eliminated order of co-frequency neighbor cell channel estimating is accomplished the serial iteration interference eliminated according to signal strength signal intensity order from big to small.
2. method according to claim 1 is characterized in that, the configuration of said co-frequency neighbor cell with Serving cell compares with the configuration of local unusual co-frequency neighbor cell, judges whether exist the step of unusual co-frequency neighbor cell to comprise in the co-frequency neighbor cell:
According to the cell id of said Serving cell, find out the cell id that said Serving cell is caused the adjacent sub-district of interference;
Cell id according to said adjacent sub-district; Retrieve in the co-frequency neighbor cell that in said Serving cell, disposes; If the co-frequency neighbor cell corresponding with the cell id of said adjacent sub-district arranged, there is said unusual co-frequency neighbor cell in the then said co-frequency neighbor cell in said co-frequency neighbor cell.
3. method according to claim 2 is characterized in that, said method also comprises:
When a transmitting terminal configuration service sub-district; Do not dispose co-frequency neighbor cell; And when receiving terminal configuration co-frequency neighbor cell,, obtain power ratio with the maximal window power of the initial channel estimation CHE of the co-frequency neighbor cell of receiving terminal configuration maximal window power divided by the CHE of said Serving cell;
If said power ratio is during greater than preset power threshold, the co-frequency neighbor cell of said receiving terminal configuration is labeled as unusual co-frequency neighbor cell.
4. method according to claim 1 is characterized in that, if when having unusual co-frequency neighbor cell in the said said co-frequency neighbor cell, the step of the priority of serial iteration interference eliminated comprises during adjustment co-frequency neighbor cell channel estimating:
When having unusual co-frequency neighbor cell in the said co-frequency neighbor cell, the order of having accomplished N serial iteration interference eliminated need satisfy following condition: preceding N bar directly belongs to Serving cell and needs carry out the serial iteration interference eliminated by signal strength signal intensity order from big to small;
After N serial iteration interference eliminated of completion; Remaining (M-N) inferior serial iteration interference eliminated comprises in all co-frequency neighbor cells of said Serving cell; Eliminate by signal strength signal intensity order from big to small, wherein M representes: total serial interference iterations of setting.
5. the device of a co-frequency neighbor cell channel estimating is characterized in that, said device comprises:
Unusual co-frequency neighbor cell detection module is used for the configuration of the co-frequency neighbor cell of the Serving cell configuration with local unusual co-frequency neighbor cell is compared, and judges whether there is unusual co-frequency neighbor cell in the said co-frequency neighbor cell;
Channel estimation module is used for when if there is unusual co-frequency neighbor cell in said co-frequency neighbor cell the priority of serial iteration interference eliminated during adjustment co-frequency neighbor cell channel estimating; Perhaps, if when not having unusual co-frequency neighbor cell in the said co-frequency neighbor cell, the interference eliminated order of co-frequency neighbor cell channel estimating is accomplished the serial iteration interference eliminated according to signal strength signal intensity order from big to small.
6. device according to claim 5 is characterized in that, said channel estimation module comprises: channel estimating selected cell, normal channel estimation unit and unusual channel estimating unit, wherein
Said channel estimating selected cell is used for the judged result according to said unusual co-frequency neighbor cell detection module, triggers said normal channel estimation unit or unusual channel estimating unit;
Said normal channel estimation unit, being used in said judged result is said co-frequency neighbor cell when not having unusual co-frequency neighbor cell, accomplishes the serial iteration interference eliminated according to signal strength signal intensity order from big to small;
Said unusual channel estimating unit, being used in said judged result is said co-frequency neighbor cell when having unusual co-frequency neighbor cell, preceding N bar directly belongs to said Serving cell and need carry out the serial iteration interference eliminated by signal strength signal intensity order from big to small; After N serial iteration interference eliminated of completion; Remaining (M-N) inferior serial iteration interference eliminated is in comprising all co-frequency neighbor cells of said Serving cell; Eliminate by signal strength signal intensity order from big to small, wherein M representes: total serial interference iterations of setting.
7. device according to claim 6 is characterized in that, said unusual co-frequency neighbor cell detection module comprises:
Co-frequency neighbor cell initial channel estimation unit is used for only disposing said Serving cell when transmitting terminal, does not dispose said co-frequency neighbor cell, and when receiving terminal disposes said co-frequency neighbor cell, accomplishes the initial channel estimation of co-frequency neighbor cell;
The maximal window power cell of statistics co-frequency neighbor cell is used for finding out maximal window power separately at each co-frequency neighbor cell;
The power ratio comparing unit is used for maximal window power with the co-frequency neighbor cell of receiving terminal configuration divided by said Serving cell maximal window power, obtain power ratio, and the said power ratio that will obtain compares with preset power threshold;
If unusual co-frequency neighbor cell record cell is used for said power ratio during greater than said preset power threshold, and the co-frequency neighbor cell of said receiving terminal configuration is recorded as unusual co-frequency neighbor cell.
8. device according to claim 7 is characterized in that, said unusual co-frequency neighbor cell detection module also comprises:
The statistics number judging unit is used to judge whether to accomplish the statistics of all unusual co-frequency cells.
9. device according to claim 8 is characterized in that, said unusual co-frequency neighbor cell detection module is used for the cell id according to said Serving cell, finds out the cell id that said Serving cell is caused the adjacent sub-district of interference; And according to the cell id of said adjacent sub-district; In the co-frequency neighbor cell of said Serving cell configuration, retrieve; If the co-frequency neighbor cell corresponding with the cell id of said adjacent sub-district arranged, there is said unusual co-frequency neighbor cell in the then said co-frequency neighbor cell in said co-frequency neighbor cell.
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| WO2012119438A2 (en) * | 2011-09-02 | 2012-09-13 | 华为技术有限公司 | Method and device for eliminating co-frequency interference on pilot frequency |
| CN102970255A (en) * | 2012-11-06 | 2013-03-13 | 深圳市海思半导体有限公司 | Interference elimination method and related device |
| CN103701729B (en) * | 2013-12-26 | 2017-01-04 | 大唐移动通信设备有限公司 | The method and device of problem adjacent area is determined during with frequency joint inspection |
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| CN1949682A (en) * | 2006-11-03 | 2007-04-18 | 凯明信息科技股份有限公司 | Method and apparatus for cancellation eliminating common-frequency cell signal interference based on serial interference |
| CN101060510A (en) * | 2006-04-19 | 2007-10-24 | 鼎桥通信技术有限公司 | A serial interference eliminated multiple cell channel estimation method and its device |
| CN101453236A (en) * | 2007-11-29 | 2009-06-10 | 杰脉通信技术(上海)有限公司 | Common frequency multi-cell channel estimation method |
| CN101645723A (en) * | 2008-08-06 | 2010-02-10 | 中兴通讯股份有限公司 | System and method for counteracting serial interference in time division synchronous code division multiple access technology |
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| CN101395812B (en) * | 2006-04-12 | 2011-11-23 | 中兴通讯股份有限公司 | Strong interference canceling method for neighboring cells by using same frequency in CDMA system |
| US9237515B2 (en) * | 2008-08-01 | 2016-01-12 | Qualcomm Incorporated | Successive detection and cancellation for cell pilot detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101060510A (en) * | 2006-04-19 | 2007-10-24 | 鼎桥通信技术有限公司 | A serial interference eliminated multiple cell channel estimation method and its device |
| CN1949682A (en) * | 2006-11-03 | 2007-04-18 | 凯明信息科技股份有限公司 | Method and apparatus for cancellation eliminating common-frequency cell signal interference based on serial interference |
| CN101453236A (en) * | 2007-11-29 | 2009-06-10 | 杰脉通信技术(上海)有限公司 | Common frequency multi-cell channel estimation method |
| CN101645723A (en) * | 2008-08-06 | 2010-02-10 | 中兴通讯股份有限公司 | System and method for counteracting serial interference in time division synchronous code division multiple access technology |
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