CN101860884A - Shared-frequency neighboring cell channel estimation method and device - Google Patents

Shared-frequency neighboring cell channel estimation method and device Download PDF

Info

Publication number
CN101860884A
CN101860884A CN 201010174509 CN201010174509A CN101860884A CN 101860884 A CN101860884 A CN 101860884A CN 201010174509 CN201010174509 CN 201010174509 CN 201010174509 A CN201010174509 A CN 201010174509A CN 101860884 A CN101860884 A CN 101860884A
Authority
CN
China
Prior art keywords
frequency neighbor
neighbor cell
cell
unusual
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN 201010174509
Other languages
Chinese (zh)
Other versions
CN101860884B (en
Inventor
闫晓鹏
马振国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing T3G Technology Co Ltd
Original Assignee
Beijing T3G Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing T3G Technology Co Ltd filed Critical Beijing T3G Technology Co Ltd
Priority to CN 201010174509 priority Critical patent/CN101860884B/en
Publication of CN101860884A publication Critical patent/CN101860884A/en
Application granted granted Critical
Publication of CN101860884B publication Critical patent/CN101860884B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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

A kind of method of co-frequency neighbor cell channel estimating and device
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 co-channel interference when improving spectrum efficiency.
At present, the TD-SCDMA system adopts joint detection algorithm to finish 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 finish channel estimating.Channel estimating during at 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 do not send on co-frequency neighbor cell, 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 invention provides a kind of method of co-frequency neighbor cell channel estimating, described 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 described co-frequency neighbor cell;
If when having unusual co-frequency neighbor cell in the described co-frequency neighbor cell, the priority of serial iteration interference eliminated when adjusting the co-frequency neighbor cell channel estimating;
If when not having unusual co-frequency neighbor cell in the described co-frequency neighbor cell, the interference eliminated order of co-frequency neighbor cell channel estimating is finished the serial iteration interference eliminated according to signal strength signal intensity order from big to small.
Preferably, the configuration of described 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 described Serving cell, find out the cell id that described Serving cell is caused the adjacent sub-district of interference;
Cell id according to described adjacent sub-district, retrieve in the co-frequency neighbor cell that in described Serving cell, disposes, if the co-frequency neighbor cell corresponding with the cell id of described adjacent sub-district arranged, there is described unusual co-frequency neighbor cell in the then described co-frequency neighbor cell in described co-frequency neighbor cell.
Preferably, described 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 described Serving cell;
If described power ratio is during greater than default power threshold, the co-frequency neighbor cell of described receiving terminal configuration is labeled as unusual co-frequency neighbor cell.
Preferably, if when having unusual co-frequency neighbor cell in the described described co-frequency neighbor cell, the step of the priority of serial iteration interference eliminated comprises when adjusting the co-frequency neighbor cell channel estimating:
When having unusual co-frequency neighbor cell in the described co-frequency neighbor cell, the order of having finished 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 finishing N serial iteration interference eliminated, remaining (M-N) inferior serial iteration interference eliminated comprises in all co-frequency neighbor cells of described Serving cell, eliminate by signal strength signal intensity order from big to small, wherein M represents: total serial interference iterations of setting.
The present invention also provides a kind of device of co-frequency neighbor cell channel estimating, and described 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 described co-frequency neighbor cell;
Channel estimation module is used for when if there is unusual co-frequency neighbor cell in described co-frequency neighbor cell the priority of serial iteration interference eliminated when adjusting the co-frequency neighbor cell channel estimating; Perhaps, if when not having unusual co-frequency neighbor cell in the described co-frequency neighbor cell, the interference eliminated order of co-frequency neighbor cell channel estimating is finished the serial iteration interference eliminated according to signal strength signal intensity order from big to small.
Preferably, described channel estimation module comprises: channel estimating selected cell, normal channel estimation unit and unusual channel estimating unit, wherein
Described channel estimating selected cell is used for the judged result according to described unusual co-frequency neighbor cell detection module, triggers described normal channel estimation unit or unusual channel estimating unit;
Described normal channel estimation unit when being used for judged result at described channel estimating selected cell and being described co-frequency neighbor cell and not having unusual co-frequency neighbor cell, is finished the serial iteration interference eliminated according to signal strength signal intensity order from big to small;
Described unusual channel estimating unit, when being used for judged result at described channel estimating selected cell and being described co-frequency neighbor cell and having unusual co-frequency neighbor cell, preceding N bar directly belongs to described Serving cell and need carry out the serial iteration interference eliminated by signal strength signal intensity order from big to small; After finishing N serial iteration interference eliminated, remaining (M-N) inferior serial iteration interference eliminated is in comprising all co-frequency neighbor cells of described Serving cell, eliminate by signal strength signal intensity order from big to small, wherein M represents: total serial interference iterations of setting.
Preferably, described unusual co-frequency neighbor cell detection module comprises:
Co-frequency neighbor cell initial channel estimation unit is used for only disposing described Serving cell when transmitting terminal, does not dispose described co-frequency neighbor cell, and when receiving terminal disposes described co-frequency neighbor cell, finishes 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 separately maximal window power 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 described Serving cell maximal window power, obtains power ratio, and the described power ratio that will obtain compares with default power threshold;
If unusual co-frequency neighbor cell record cell is used for described power ratio during greater than described default power threshold, and the co-frequency neighbor cell of described receiving terminal configuration is recorded as unusual co-frequency neighbor cell.
Preferably, described unusual co-frequency neighbor cell detection module also comprises:
The statistics number judging unit is used to judge whether to finish the statistics of all unusual co-frequency cells.
Preferably, described unusual co-frequency neighbor cell detection module is used for the cell id according to described Serving cell, finds out the cell id that described Serving cell is caused the adjacent sub-district of interference; And according to the cell id of described adjacent sub-district, in the co-frequency neighbor cell of described Serving cell configuration, retrieve, if the co-frequency neighbor cell corresponding with the cell id of described adjacent sub-district arranged, there is described unusual co-frequency neighbor cell in the then described co-frequency neighbor cell in described co-frequency neighbor cell.
As shown from the above technical solution, at first the configuration of co-frequency neighbor cell in the Serving cell configuration with local unusual co-frequency neighbor cell is 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 when adjusting the 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, finish 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 by 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 a limitation of the 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 as follows:
Step 101, the configuration of co-frequency neighbor cell in the Serving cell configuration with local unusual co-frequency neighbor cell is compared, judge whether have unusual co-frequency neighbor cell, execution in step 102 or step 103 then in this co-frequency neighbor 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 and may 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, do not have unusual co-frequency neighbor cell in this co-frequency neighbor cell.
In the present embodiment, the cell id to the adjacent sub-district that may cause unusual interference can be obtained in advance by algorithm simulating.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, initial CHE (Channel Estimation with the co-frequency neighbor cell of receiving terminal configuration, channel estimating) maximal window power obtains power ratio R divided by the maximal window power of the initial CHE of Serving cell; If power ratio R is during greater than default power threshold T, the co-frequency neighbor cell of receiving terminal configuration is labeled as unusual co-frequency neighbor cell, for example the cell id of this co-frequency neighbor cell can be recorded in the unusual co-frequency neighbor cell list; Otherwise can in unusual co-frequency neighbor cell list, ignore this group cell configuration.
By simulation calculation as can be known, this default power threshold T is usually greater than 0.7, and 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 default in the unusual co-frequency neighbor cell list also can be different.
Step 102, if when having unusual co-frequency neighbor cell in the co-frequency neighbor cell, the priority of serial iteration interference eliminated when adjusting the co-frequency neighbor cell channel estimating;
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 finished 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 finishing N serial iteration interference eliminated, 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 represents: total serial interference iterations.The footpath number that Serving cell has been finished 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 as follows:
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 default 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;
Step 103, 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 is finished the serial iteration interference eliminated according to signal strength signal intensity order from big to small.
In the present embodiment, when if 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 from big to small according to power, according to power from big to small, finish many sub-districts serial iteration interference eliminated M time, concrete steps are as follows:
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.
As shown from the above technical solution, at first the configuration of co-frequency neighbor cell in the Serving cell configuration with local unusual co-frequency neighbor cell is 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 when adjusting the 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, finish 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 by 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 as follows:
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, finish the initial channel estimation of co-frequency neighbor cell;
Step 202, add up maximal window power in each co-frequency neighbor cell;
Step 203, the power ratio R of co-frequency neighbor cell and Serving cell and default power threshold T are compared, if power ratio R is greater than default power threshold T, execution in step 204; Otherwise, execution in step 205;
The cell id of step 204, record co-frequency neighbor cell;
Just, the cell id of the co-frequency neighbor cell that above-mentioned receiving terminal can be disposed records in the unusual co-frequency neighbor cell list, for example basic Midamble number of this co-frequency neighbor cell can be recorded in the unusual co-frequency neighbor cell list.
Step 205, judged whether to finish the statistics of all unusual co-frequency neighbor cells, if, but process ends; Otherwise, return step 201.
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 save 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, may 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), so co-frequency neighbor cell is included in unusual co-frequency cell tabulation, otherwise in unusual co-frequency cell tabulation, ignored this group cell configuration).
Channel estimation module 32 is used for when if there is unusual co-frequency neighbor cell in co-frequency neighbor cell the priority of serial iteration interference eliminated when adjusting the co-frequency neighbor cell channel estimating; Perhaps, 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 is finished the serial iteration interference eliminated according to signal strength signal intensity order from big to small.
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, enter 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, finishes 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 separately maximal window power 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 the power ratio R that obtains and default power threshold T are compared;
If unusual co-frequency neighbor cell record cell 314 is used for power ratio R during greater than default 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 finish 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 finished 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 the footpath position and numerical value, 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 finishing N serial iteration interference eliminated, 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 represents: 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 the footpath position and numerical value, in all sub-districts, deduct the influence in these several footpaths.(3) repetitive process (2) several times are up to satisfying default 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 improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (9)

1. the method for a co-frequency neighbor cell channel estimating is characterized in that, described 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 described co-frequency neighbor cell;
If when having unusual co-frequency neighbor cell in the described co-frequency neighbor cell, the priority of serial iteration interference eliminated when adjusting the co-frequency neighbor cell channel estimating;
If when not having unusual co-frequency neighbor cell in the described co-frequency neighbor cell, the interference eliminated order of co-frequency neighbor cell channel estimating is finished 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 described 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 described Serving cell, find out the cell id that described Serving cell is caused the adjacent sub-district of interference;
Cell id according to described adjacent sub-district, retrieve in the co-frequency neighbor cell that in described Serving cell, disposes, if the co-frequency neighbor cell corresponding with the cell id of described adjacent sub-district arranged, there is described unusual co-frequency neighbor cell in the then described co-frequency neighbor cell in described co-frequency neighbor cell.
3. method according to claim 2 is characterized in that, described 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 described Serving cell;
If described power ratio is during greater than default power threshold, the co-frequency neighbor cell of described 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 described described co-frequency neighbor cell, the step of the priority of serial iteration interference eliminated comprises when adjusting the co-frequency neighbor cell channel estimating:
When having unusual co-frequency neighbor cell in the described co-frequency neighbor cell, the order of having finished 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 finishing N serial iteration interference eliminated, remaining (M-N) inferior serial iteration interference eliminated comprises in all co-frequency neighbor cells of described Serving cell, eliminate by signal strength signal intensity order from big to small, wherein M represents: total serial interference iterations of setting.
5. the device of a co-frequency neighbor cell channel estimating is characterized in that, described 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 described co-frequency neighbor cell;
Channel estimation module is used for when if there is unusual co-frequency neighbor cell in described co-frequency neighbor cell the priority of serial iteration interference eliminated when adjusting the co-frequency neighbor cell channel estimating; Perhaps, if when not having unusual co-frequency neighbor cell in the described co-frequency neighbor cell, the interference eliminated order of co-frequency neighbor cell channel estimating is finished 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, described channel estimation module comprises: channel estimating selected cell, normal channel estimation unit and unusual channel estimating unit, wherein
Described channel estimating selected cell is used for the judged result according to described unusual co-frequency neighbor cell detection module, triggers described normal channel estimation unit or unusual channel estimating unit;
Described normal channel estimation unit when being used for judged result at described channel estimating selected cell and being described co-frequency neighbor cell and not having unusual co-frequency neighbor cell, is finished the serial iteration interference eliminated according to signal strength signal intensity order from big to small;
Described unusual channel estimating unit, when being used for judged result at described channel estimating selected cell and being described co-frequency neighbor cell and having unusual co-frequency neighbor cell, preceding N bar directly belongs to described Serving cell and need carry out the serial iteration interference eliminated by signal strength signal intensity order from big to small; After finishing N serial iteration interference eliminated, remaining (M-N) inferior serial iteration interference eliminated is in comprising all co-frequency neighbor cells of described Serving cell, eliminate by signal strength signal intensity order from big to small, wherein M represents: total serial interference iterations of setting.
7. device according to claim 6 is characterized in that, described unusual co-frequency neighbor cell detection module comprises:
Co-frequency neighbor cell initial channel estimation unit is used for only disposing described Serving cell when transmitting terminal, does not dispose described co-frequency neighbor cell, and when receiving terminal disposes described co-frequency neighbor cell, finishes 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 separately maximal window power 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 described Serving cell maximal window power, obtains power ratio, and the described power ratio that will obtain compares with default power threshold;
If unusual co-frequency neighbor cell record cell is used for described power ratio during greater than described default power threshold, and the co-frequency neighbor cell of described receiving terminal configuration is recorded as unusual co-frequency neighbor cell.
8. device according to claim 7 is characterized in that, described unusual co-frequency neighbor cell detection module also comprises:
The statistics number judging unit is used to judge whether to finish the statistics of all unusual co-frequency cells.
9. device according to claim 8 is characterized in that, described unusual co-frequency neighbor cell detection module is used for the cell id according to described Serving cell, finds out the cell id that described Serving cell is caused the adjacent sub-district of interference; And according to the cell id of described adjacent sub-district, in the co-frequency neighbor cell of described Serving cell configuration, retrieve, if the co-frequency neighbor cell corresponding with the cell id of described adjacent sub-district arranged, there is described unusual co-frequency neighbor cell in the then described co-frequency neighbor cell in described co-frequency neighbor cell.
CN 201010174509 2010-05-11 2010-05-11 Shared-frequency neighboring cell channel estimation method and device Expired - Fee Related CN101860884B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010174509 CN101860884B (en) 2010-05-11 2010-05-11 Shared-frequency neighboring cell channel estimation method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010174509 CN101860884B (en) 2010-05-11 2010-05-11 Shared-frequency neighboring cell channel estimation method and device

Publications (2)

Publication Number Publication Date
CN101860884A true CN101860884A (en) 2010-10-13
CN101860884B CN101860884B (en) 2012-12-26

Family

ID=42946472

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201010174509 Expired - Fee Related CN101860884B (en) 2010-05-11 2010-05-11 Shared-frequency neighboring cell channel estimation method and device

Country Status (1)

Country Link
CN (1) CN101860884B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102369707A (en) * 2011-09-02 2012-03-07 华为技术有限公司 Method and device for eliminating co-channel 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
CN103701729A (en) * 2013-12-26 2014-04-02 大唐移动通信设备有限公司 Method and device for determining adjacent problem cells during identical-frequency joint inspection

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2007115434A1 (en) * 2006-04-12 2007-10-18 Zte Corporation Strong interference canceling method for neighboring cells using same frequency in cdma system
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
US20100029213A1 (en) * 2008-08-01 2010-02-04 Qualcomm Incorporated Successive detection and cancellation for cell pilot detection
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007115434A1 (en) * 2006-04-12 2007-10-18 Zte Corporation Strong interference canceling method for neighboring cells using same frequency in cdma system
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
US20100029213A1 (en) * 2008-08-01 2010-02-04 Qualcomm Incorporated Successive detection and cancellation for cell pilot detection
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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102369707A (en) * 2011-09-02 2012-03-07 华为技术有限公司 Method and device for eliminating co-channel interference on pilot frequency
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
WO2012119438A3 (en) * 2011-09-02 2012-11-01 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
CN103701729A (en) * 2013-12-26 2014-04-02 大唐移动通信设备有限公司 Method and device for determining adjacent problem cells during identical-frequency joint inspection
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

Also Published As

Publication number Publication date
CN101860884B (en) 2012-12-26

Similar Documents

Publication Publication Date Title
CN101056285B (en) Parallel interference elimination channel estimation method and device in the radio mobile communication system
CN103428704A (en) Method and device for sensing frequency spectra
CN101860884B (en) Shared-frequency neighboring cell channel estimation method and device
CN103702343A (en) Detection method and device for same frequency interference cells
CN101072046A (en) Multi-path selecting method and receiver
CN100574130C (en) The detection method and the device of TD-SCDMA system same frequency sub-district intermediate code
CN102137484B (en) Method and device for measuring RSCP (received signal code power) of adjacent cells
CN102461290B (en) Base station apparatus, edge user estimating method, and program
CN105429913A (en) Multi-level detection and identification method based on characteristic value
CN105282059A (en) Multi-path selection method and equipment
CN102857449B (en) A kind of parallel co-frequency interference elimination method and device
CN103229422B (en) Method and device for demodulating signals of physical random access channel
CN101056120A (en) Downlink multi-user detection method in code-division multi-address wireless communication system
CN101198139B (en) TD-SCDMA terminal and method for implementing co-channel interference subdistrict information real-time detection
CN102457300B (en) Joint detection method and device
EP2485417A1 (en) Method and device for selecting noise path
CN103379500A (en) Method and apparatus for eliminating co-frequency interference based on dual carrier downlink system
CN102869114B (en) System and method for analyzing throughput performance of common hopping multichannel protocol based on institute of electrical and electronics engineers (IEEE) 802.11 standard
CN101057468B (en) Method and device for detecting high-mobility state of mobile terminal and related equipment
CN111031611A (en) Pilot random access method based on non-authorization
CN103701735A (en) Multiple cell-based same-frequency joint detection method and device
CN112532288B (en) Diversity combining selection method and device for gateway of Internet of things
CN103997356A (en) Spreading factor detection method and apparatus, and mobile terminal
CN102752013B (en) Activation code channel detection method and device
CN101938688A (en) Time offset calculation method and device in distance measurement

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121226

Termination date: 20180511