CN103414665B

CN103414665B - The method and device that a kind of channel is estimated

Info

Publication number: CN103414665B
Application number: CN201310324083.5A
Authority: CN
Inventors: 吴江; 江长国; 高振兴
Original assignee: Huawei Technologies Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2013-07-30
Filing date: 2013-07-30
Publication date: 2016-08-03
Anticipated expiration: 2033-07-30
Also published as: CN103414665A

Abstract

The embodiment provides the method and device that a kind of channel is estimated, relate to the communications field, solve during channel is estimated and activate the problem that the False Rate of window is high.The specific scheme is that channel estimating apparatus this community fenestrate and at least one cooperation cell all activated window of fenestrate middle this community of acquisition and all activated window of at least one cooperation cell；The all activated window of this community obtains and retains window and non-reserved window, all activated window of non-reserved window and at least one cooperation cell obtains at least one and activates window as supplementary window；Window will be retained with supplementary window as activating window intersection, according to the window activated in window intersection, obtain channel estimation value.The present invention estimates for channel.

Description

The method and device that a kind of channel is estimated

Technical field

The present invention relates to the communications field, particularly relate to the method and device that a kind of channel is estimated.

Background technology

CDMA (CodeDivisionMultipleAccess, CDMA) technology is wireless communication technology based on spread spectrum.It is currently based on the 3G (Third Generation) Moblie commercial network (3 of CDMA^rdGeneration, 3G) it is widely used in the whole world, have three technical standards: WCDMA (WidebandCDMA, WCDMA), CDMA2000 and time division SCDMA (Time-DivisionSynchronousCDMA, TD-SCDMA).

Need to estimate channel impulse response as coherent demodulation in cdma system, i.e. channel is estimated.Channel is estimated to carry out based on pilot tone.In TD-SCDMA system, pilot tone is referred to as midamble (Midamble).The Midamble code that in same time slot, different user is used is to be produced after cyclic shift by the basic Midamble code of a length of 128.User is referred to as window, and in a community, the quantity of window is obtained by cell base station configuration, is designated as K, and wherein the channel impulse response of kth window is expressed as, wherein k=1,2,3 ... K.Each window is made up of one or more footpaths.Community can be for the code channel of some windows distribution correspondence.Estimating channel impulse response, the corresponding value that all communities are activated window processes, obtain the result of final channel impulse response estimation, during channel is estimated, the community needing the channel carrying out window to estimate is referred to as this community, is referred to as adjacent cell with this community with the neighbor cell of frequency.

In existing channel estimation process: community according to community in the power of all of window, by fenestrate signalc threshold and noise gate in corresponding algorithm acquisition community, the power of the window in community is judged with noise gate according to signalc threshold fenestrate in community, according to result of determination, arranging window is to activate window or inactive window, and this process is referred to as the detection activating window.

During stating channel estimation in realization, channel activates window judgement in estimating is the most relevant with the window of Serving cell, does not accounts for the environment in multiple cell co-channel interference, False Rate height, and then the error rate causing channel to be estimated is high.

Summary of the invention

Embodiments of the invention provide the method and device that a kind of channel is estimated, reduce the False Rate in the environment of multiple cell co-channel interference, and then reduce the error rate that channel is estimated.

For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that

First aspect, it is provided that a kind of method that channel is estimated, including:

Channel estimating apparatus Serving cell fenestrate and at least one cooperation cell all activated window of the fenestrate described Serving cell of middle acquisition and all activated window of at least one cooperation cell；

Described channel estimating apparatus obtains reservation window and non-reserved window in all activated window of described Serving cell, described reservation window is the activation window having Serving cell code channel corresponding in Serving cell, and described non-reserved window is except all activated window retained outside window in Serving cell；

Described channel estimating apparatus obtains at least one in all activated window of described non-reserved window and at least one cooperation cell described and activates window as supplementary window；

Described reservation window and supplementary window as activating window intersection, according to the window in described activation window intersection, are obtained channel estimation value by described channel estimating apparatus；

Wherein Serving cell is community, subscriber equipment place, and cooperation cell is the adjacent cell of described Serving cell.

In conjunction with first aspect, in the implementation that the first is possible, described channel estimating apparatus Serving cell fenestrate and at least one cooperation cell all activated window of the fenestrate described Serving cell of middle acquisition and all activated window of at least one cooperation cell, including:

Described channel estimating apparatus obtain described Serving cell the fenestrate and fenestrate channel estimation value of at least one cooperation cell, described channel estimation value includes: described Serving cell fenestrate and at least one cooperation cell fenestrate in the power in footpath of each window, noise power and described Serving cell fenestrate and at least one cooperation cell fenestrate in the power of each window；

Described channel estimating apparatus according to described channel estimation value described Serving cell fenestrate and at least one cooperation cell all activated window of the fenestrate described Serving cell of middle acquisition and all activated window of cooperation cell.

In conjunction with first aspect or implementation that the first is possible, in the implementation that the second is possible, described channel estimating apparatus obtain in all activated window of described non-reserved window and at least one cooperation cell described at least one activate window as supplementary window, specifically include:

Described channel estimating apparatus obtains the quantity of described reservation window, calculates the quantity of described reservation window and the difference of predetermined number, using the absolute value of the quantity of described reservation window and the difference of predetermined number as estimate amount；

The power of each window in all activated window of described channel estimating apparatus acquisition at least one cooperation cell described and described non-reserved window；

Described channel estimating apparatus obtains the prominent activation window of described estimate amount as supplementary window in all activated window of described non-reserved window and at least one cooperation cell described.

In conjunction with the implementation that the second is possible, in the implementation that the third is possible, described channel estimating apparatus obtains the prominent activation window of described estimate amount as supplementary window in all activated window of described non-reserved window and at least one cooperation cell described, including:

Described channel estimating apparatus by all activated window of at least one cooperation cell described and described non-reserved window fenestrate be ranked up by the power of window is descending, obtain and activate window sequence；

Described channel estimating apparatus obtains the most front activation window of the serial number of estimate amount as supplementary window in described activation window sequence.

In conjunction with first aspect, in the 4th kind of possible implementation, described channel estimating apparatus obtain in all activated window of described non-reserved window and at least one cooperation cell described at least one activate window as supplementary window, specifically include:

The value of the current time slots spreading factor of described channel estimating apparatus detection Serving cell；

The value of the current time slots spreading factor according to Serving cell, using the channel impulse response head window of described Serving cell as supplementary window；

Or,

The value of the current time slots spreading factor according to Serving cell, by in all activated window of at least one cooperation cell described and described non-reserved window fenestrate be ranked up by the power of window is descending, obtain and activate window sequence, and the most front activation window of the serial number that obtains estimate amount in described activation window sequence is as supplementary window.

In conjunction with the implementation that the first is possible, in the 5th kind of possible implementation, described channel estimating apparatus according to described channel estimation value described Serving cell fenestrate and at least one cooperation cell all activated window of the fenestrate described Serving cell of middle acquisition and all activated window of cooperation cell, including:

Described channel estimating apparatus according to described Serving cell fenestrate and at least one cooperation cell fenestrate in the power in footpath of each window, described Serving cell fenestrate and fenestrate each window of at least one cooperation cell chooses a prominent footpath as most powerful path；

Described channel estimating apparatus choose in all of most powerful path prominent most powerful path as the overall situation most powerful path, using the overall situation most powerful path power be multiplied by the default window power threshold factor value as window power threshold；

Described noise power is multiplied by the default noise gate factor value as noise gate by described channel estimating apparatus；

Described channel estimating apparatus selects value maximum in the value of window power threshold and the value of noise gate as threshold value；

Described channel estimating apparatus by described Serving cell fenestrate and at least one cooperation cell fenestrate in the power of each window contrast with threshold value respectively, each power is marked more than the window of threshold value, using window labeled described in described Serving cell as the activation window of Serving cell, using window labeled described at least one cooperation cell described as the activation window of cooperation cell.

In conjunction with the 5th kind of possible implementation, in the 6th kind of possible implementation, described reservation window and supplementary window as activating window intersection, according to the window in described activation window intersection, are obtained channel estimation value by described channel estimating apparatus, including:

The footpath of each window in described activation window intersection is judged by described channel estimating apparatus according to described channel estimation value, obtains effective diameter according to result of determination in the fenestrate footpath of described activation window intersection；

Described channel estimating apparatus, according to described effective diameter, obtains channel estimation value.

In conjunction with the 6th kind of possible implementation, in the 7th kind of possible implementation, the footpath of each window in described activation window intersection is judged by described channel estimating apparatus according to described channel estimation value, in the fenestrate footpath of described activation window intersection, effective diameter is obtained according to result of determination, including:

Described channel estimating apparatus arranges footpath threshold value according to described channel estimation value；

The power in the footpath of each window in described activation window intersection is contrasted with described footpath threshold value, power is judged to effective diameter more than the footpath of footpath threshold value.

In conjunction with the 7th kind of possible implementation, in the 8th kind of possible implementation, described channel estimating apparatus arranges footpath threshold value according to channel estimation value, including:

The power of described overall situation most powerful path is multiplied by the default footpath threshold factor value as footpath thresholding by described channel estimating apparatus；

Described channel estimating apparatus selects value minimum in the value of noise gate and the value of footpath thresholding as footpath threshold value.

In conjunction with the implementation that the first is possible, in the 9th kind of possible implementation, described channel estimating apparatus obtain described Serving cell the fenestrate and fenestrate noise power of cooperation cell, including:

Described channel estimating apparatus select fenestrate and at least one cooperation cell of institute of described Serving cell fenestrate in each window footpath in, at least one footpath prominent is as reservation footpath；

Described channel estimating apparatus calculates the meansigma methods of the power in all non-reserved footpaths, and using the meansigma methods of the power in described all non-reserved footpaths as described noise power, described non-reserved footpath is the footpath in addition to retaining footpath.

In conjunction with the 5th kind of possible implementation, in the tenth kind of possible implementation, described noise power is multiplied by the default noise gate factor value as noise gate by described channel estimating apparatus, including:

Described noise power is multiplied by the default Serving cell noise gate factor value as Serving cell noise gate by described channel estimating apparatus；

Described noise power is multiplied by the default cooperation cell noise gate factor value as at least one cooperation cell noise gate described by described channel estimating apparatus；

Described channel estimating apparatus selects value maximum in the value of described Serving cell noise gate and the value of at least one cooperation cell noise gate as the value of noise gate.

Second aspect, it is provided that the device that a kind of channel is estimated, including: activating window determination module, first selects module, and second selects module and estimation module；

Described activation window determination module for obtain fenestrate and at least one cooperation cell of institute of Serving cell fenestrate, described Serving cell fenestrate and at least one cooperation cell all activated window of fenestrate middle acquisition Serving cell and all activated window of at least one cooperation cell；

Described first selects module to obtain in all activated window of the described Serving cell obtained at described activation window determination module retains window and non-reserved window, described reservation window is the activation window having Serving cell code channel corresponding in Serving cell, and described non-reserved window is except all activated window retained outside window in Serving cell；

Described second selects module to obtain at least one in all activated window of at least one cooperation cell described in obtaining at the described first described non-reserved window selecting module to obtain and described activation window determination module activates window as supplementary window；

The described reservation window that described estimation module obtains for selecting module using described first and the described second described supplementary window selecting module to obtain, as activating window intersection, according to the window in described activation window intersection, obtain channel estimation value；

In conjunction with first aspect, in the implementation that the first is possible, described activation window determination module, including initial estimation unit and identifying unit；

Described initial estimation unit for obtain described Serving cell fenestrate and at least one cooperation cell fenestrate channel estimation value include as channel estimation value, described channel estimation value: described Serving cell fenestrate and at least one cooperation cell fenestrate in the power in footpath of each window, noise power and described Serving cell fenestrate and at least one cooperation cell fenestrate in the power of each window；

Described identifying unit for the described channel estimation value that obtains according to described initial estimation unit described Serving cell fenestrate and at least one cooperation cell all activated window of the fenestrate described Serving cell of middle acquisition and all activated window of cooperation cell.

In conjunction with first aspect or implementation that the first is possible, in the implementation that the second is possible, it is characterised in that described second selects module to include: counting unit, initial value acquiring unit and supplementary window select unit；

Described counting unit, for obtaining the quantity of described reservation window, calculates the quantity of described reservation window and the difference of predetermined number, using the absolute value of the quantity of described reservation window and the difference of predetermined number as estimate amount；

Described initial value acquiring unit is the power of each window in all activated window obtaining at least one cooperation cell described and described non-reserved window；

Described supplementary window selects unit power of each window in all activated window according at least one cooperation cell described in the acquisition of described initial value acquiring unit and described non-reserved window, obtains the prominent activation window of the described estimate amount that described counting unit obtains as supplementary window in all activated window of described non-reserved window and at least one cooperation cell described.

In conjunction with the implementation that the second is possible, in the implementation that the third is possible, described supplementary window selects unit, including sequence subelement and selection subelement；

Described sequence subelement, for being ranked up fenestrate for the institute in all activated window of at least one cooperation cell described and described non-reserved window by the power of window is descending, obtains activation window sequence；

Described selection subelement is for obtaining the most front activation window of the serial number of estimate amount as supplementary window in the described activation window sequence that described sequence subelement obtains.

In conjunction with second aspect, in the 4th kind of possible implementation, described second selects module, also particularly useful for:

The value of the current time slots spreading factor of detection Serving cell；

The value of the current time slots spreading factor according to Serving cell, using channel impulse response head window as supplementary window；

Or,

In conjunction with the implementation that the first is possible, in the 5th kind of possible implementation, described identifying unit includes: most powerful path judgment sub-unit, window power threshold subelement, noise gate subelement, threshold value subelement, labelling subelement；

Described most powerful path judgment sub-unit for according to described Serving cell fenestrate and at least one cooperation cell fenestrate in the power in footpath of each window, described Serving cell fenestrate and each window of at least one cooperation cell chooses a prominent footpath as most powerful path；

Described window power threshold subelement for choose in all of described most powerful path that described most powerful path judgment sub-unit is chosen prominent most powerful path as the overall situation most powerful path, using the overall situation most powerful path power be multiplied by the default window power threshold factor value as window power threshold；

Described noise gate subelement for being multiplied by the default noise gate factor value as noise gate using described noise power；

Value maximum in the value of the described noise gate that the value of the described window power threshold that described threshold value subelement obtains for selecting described window power threshold subelement and described noise gate subelement obtain is as threshold value；

Described labelling subelement for by fenestrate and at least one cooperation cell of institute of described Serving cell fenestrate in the power threshold value with the acquisition of described threshold value subelement respectively of each window contrast, each power is marked more than the window of threshold value, using window labeled described in Serving cell as the activation window of described Serving cell, using window labeled described at least one cooperation cell described as the activation window of at least one cooperation cell described.

In conjunction with the 5th kind of possible implementation, in the 6th kind of possible implementation, described estimation module includes: effective diameter acquiring unit and estimation unit；

Described effective diameter acquiring unit is for receiving the described channel estimation value that described activation window determination module sends, according to the described channel estimation value that described activation window determination module obtains, the footpath of each window in described activation window intersection is judged, in the fenestrate footpath of described activation window intersection, obtain effective diameter according to result of determination；

Described estimation unit is for receiving the described effective diameter that described effective diameter acquiring unit sends, and according to the described effective diameter of described effective diameter acquiring unit acquisition, obtains channel estimation value.

In conjunction with the 6th kind of possible implementation, in the 7th kind of possible implementation, described effective diameter acquiring unit includes: arrange subelement and effective diameter obtains subelement；

The described subelement that arranges arranges footpath threshold value for the described channel estimation value obtained according to described activation window determination module；

Described effective diameter obtains subelement and is used for contrasting the power in the footpath of each window in described activation window intersection with the described described footpath threshold value arranging subelement setting, and more than the footpath of footpath threshold value, power is judged to effective diameter.

In conjunction with the 7th kind of possible implementation, in the 8th kind of possible implementation, described arrange subelement specifically for:

The power of the described overall situation most powerful path chosen by described activation window determination module is multiplied by the default footpath threshold factor value as footpath thresholding, selects value minimum in the value of noise gate and the value of footpath thresholding as footpath threshold value.

In conjunction with the implementation that the first is possible, in the 9th kind of possible implementation, described initial estimation unit, specifically for:

Choose described Serving cell fenestrate and at least one cooperation cell fenestrate in each window footpath in, at least one footpath prominent is as retaining footpath；

Described initial estimation unit is specifically additionally operable to calculate the meansigma methods of the power in all non-reserved footpaths, and using the meansigma methods of the power in described all non-reserved footpaths as described noise power, described non-reserved footpath is the footpath in addition to retaining footpath.

In conjunction with the 5th kind of possible implementation, in the 11st kind of possible implementation,

Described noise gate subelement is additionally operable to the value described noise power being multiplied by the default Serving cell noise gate factor as Serving cell noise gate, and described noise power is multiplied by the default cooperation cell noise gate factor value as at least one cooperation cell noise gate described；

Described noise gate subelement is additionally operable in the value of value and at least one the cooperation cell noise gate selecting described Serving cell noise gate the value value as noise gate of maximum.

The method and device that the channel that embodiments of the invention provide is estimated, when activating the judgement of window in channel is estimated, apply the window of Serving cell and the window of cooperation cell simultaneously, reduce the False Rate in the environment of multiple cell co-channel interference, and then reduce the error rate that channel is estimated.

Accompanying drawing explanation

In order to be illustrated more clearly that embodiments of the invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below.

The schematic flow sheet of the method that Fig. 1 estimates for a kind of channel that embodiments of the invention provide；

The schematic flow sheet of the method that Fig. 2 estimates for a kind of channel that another embodiment of the present invention provides；

The principle schematic of the method that Fig. 3 estimates for a kind of channel that embodiments of the invention provide；

The structural representation of the device that Fig. 4 estimates for a kind of channel that embodiments of the invention provide；

The structural representation of the device that Fig. 5 estimates for a kind of channel that another embodiment of the present invention provides；

The structural representation of the device that Fig. 6 estimates for the another kind of channel that another embodiment of the present invention provides；

The structural representation of the device that Fig. 7 estimates for another channel that another embodiment of the present invention provides；

The structural representation of the device that Fig. 8 estimates for another channel that another embodiment of the present invention provides；

The structural representation of the device that a kind of channel that Fig. 9 another embodiment of the present invention provides is estimated.

Detailed description of the invention

Below in conjunction with the accompanying drawing in embodiments of the invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.

The embodiment provides the method and device that a kind of channel is estimated, be applied to TD-SCDMA system and carry out the scene of channel estimation, concrete, embodiments of the invention provide a kind of method that channel is estimated, with reference to shown in Fig. 1, comprise the following steps:

101, channel estimating apparatus Serving cell fenestrate and at least one cooperation cell all activated window of fenestrate middle acquisition Serving cell and all activated window of at least one cooperation cell.

102, channel estimating apparatus obtains reservation window and non-reserved window in all activated window of Serving cell.

Wherein, retaining window is the activation window having Serving cell code channel corresponding in Serving cell, and non-reserved window is except all activated window retained outside window in Serving cell.

103, channel estimating apparatus obtains at least one in all activated window of non-reserved window and at least one cooperation cell and activates window as supplementary window.

104, channel estimating apparatus will retain window with supplementary window as activating window intersection, according to the window activated in window intersection, obtain channel estimation value.

The method that the channel that embodiments of the invention provide is estimated, during carrying out channel estimation, apply the window of Serving cell and the window of cooperation cell simultaneously, reduce the False Rate activating window in the environment of multiple cell co-channel interference, and then reduce the error rate that channel is estimated.

Embodiments of the invention also provide for a kind of method that channel is estimated, concrete, with reference to shown in Fig. 2, comprise the following steps:

201, channel estimating apparatus obtain Serving cell the fenestrate and fenestrate channel estimation value of at least one cooperation cell.

Wherein, this channel estimation value specifically include that Serving cell fenestrate and at least one cooperation cell fenestrate in each window the power in footpath, noise power and Serving cell fenestrate and at least one cooperation cell fenestrate in the power of each window.

Further, channel estimating apparatus acquisition noise power may comprise steps of:

Step one: channel estimating apparatus select fenestrate and at least one cooperation cell of institute of Serving cell fenestrate in each window footpath in, at least one footpath prominent is as reservation footpath.

Step 2: channel estimating apparatus calculates the meansigma methods of the power in all non-reserved footpaths, and using the meansigma methods of the power in all non-reserved footpaths as noise power, wherein, non-reserved footpath is the footpath in addition to retaining footpath.

Optionally, channel estimating apparatus obtain Serving cell fenestrate and cooperation cell fenestrate in the power of each window may include that

The power in footpath all of in window is sued for peace by channel estimating apparatus, using the power in footpath all of in window and power as this window；

Or, channel estimating apparatus obtains the strongest footpath of window internal power, using the value of the power in footpath the strongest for this window internal power as the power of this window；

Or, channel estimating apparatus obtains the strongest a number of footpath of window internal power, the power summation in a number of footpath the strongest to this power, using the power in a number of footpath the strongest for this power and power as this window.

202, channel estimating apparatus according to this channel estimation value Serving cell fenestrate and at least one cooperation cell all activated window of fenestrate middle acquisition Serving cell and all activated window of at least one cooperation cell.

With reference to shown in Fig. 3, step 202, can specifically include following steps:

202a, channel estimating apparatus according to the Serving cell in beginning channel estimation value fenestrate and at least one cooperation cell fenestrate in the power in footpath of each window, Serving cell fenestrate and fenestrate each window of this at least one cooperation cell chooses a prominent footpath as most powerful path.

202b, channel estimating apparatus choose prominent most powerful path as overall situation most powerful path in all of most powerful path, the power of overall situation most powerful path is multiplied by the default window power threshold factor value as window power threshold, wherein, the representative value that the window power threshold factor can take is the arbitrary value between 1/to four/8th.

Noise power in beginning channel estimation value is multiplied by the default noise gate factor value as noise gate by 202c, channel estimating apparatus, and wherein, the representative value that the noise gate factor can take is the arbitrary value between two to eight.

Concrete, step 202c may comprise steps of:

Step one: noise power is multiplied by the default Serving cell noise gate factor value as Serving cell noise gate by channel estimating apparatus, and wherein, the representative value that the Serving cell noise gate factor can take is the arbitrary value between two to eight.

Step 2: noise power is multiplied by least one the default cooperation cell noise gate factor value as this at least one cooperation cell noise gate by channel estimating apparatus, wherein, the representative value that at least one cooperation cell noise gate factor can take is the arbitrary value between two to eight.

Step 3: channel estimating apparatus selects value maximum in the value of Serving cell noise gate and the value of at least one cooperation cell noise gate as the value of noise gate.

The Serving cell noise gate factor can be identical with at least one cooperation cell noise gate factor, it is also possible to different.

202d, channel estimating apparatus select value maximum in the value of window power threshold and the value of noise gate as threshold value.

202e, channel estimating apparatus by Serving cell fenestrate and at least one cooperation cell fenestrate in the power of each window contrast with threshold value respectively, each power is marked more than the window of threshold value, using window labeled in Serving cell as the activation window of Serving cell, using window labeled at least one cooperation cell as the activation window of this at least one cooperation cell.

Wherein, step 202b can any one step first be carried out with step 202c, it is also possible to two steps are carried out simultaneously.

203, channel estimating apparatus obtains reservation window and non-reserved window in all activated window of Serving cell.

Wherein, retaining window is the activation window having the code channel of Serving cell corresponding in Serving cell, and non-reserved window is except all activated window retained outside window in Serving cell

204, channel estimating apparatus obtains at least one in all activated window of non-reserved window and at least one cooperation cell and activates window as supplementary window.

Concrete, step 204 may comprise steps of:

Step one: channel estimating apparatus obtains the quantity of reservation window, calculates the difference of quantity and the predetermined number retaining window, using the absolute value of the quantity retaining window and the difference of predetermined number as estimate amount.

Step 2: channel estimating apparatus obtains the power of each window in all activated window of at least one cooperation cell and non-reserved window.

Step 3: channel estimating apparatus obtains the prominent activation window of estimate amount as supplementary window in all activated window of non-reserved window and at least one cooperation cell.

Wherein, the concrete method of the prominent activation window that channel estimating apparatus obtains estimate amount in all activated window of non-reserved window and at least one cooperation cell can be:

Channel estimating apparatus by all activated window of at least one cooperation cell and non-reserved window fenestrate be ranked up by the power of window is descending, obtain and activate window sequence, activating in window sequence the most front activation window of the serial number obtaining estimate amount as supplementary window.

Optionally, the implementation method of step 204 can also be specifically:

The value of the current time slots spreading factor of channel estimating apparatus detection Serving cell.

The value of the current time slots spreading factor according to Serving cell, using the channel impulse response head window of Serving cell as supplementary window, wherein, when the value of the current time slots spreading factor of Serving cell is 1, channel estimating apparatus using the channel impulse response head window of Serving cell as supplementary window.

Or, value according to the current time slots spreading factor when Serving cell, by in all activated window of at least one cooperation cell and non-reserved window fenestrate be ranked up by the power of window is descending, obtain and activate window sequence, and activating in window sequence the most front activation window of the serial number obtaining estimate amount as supplementary window, wherein, when the value of the current time slots spreading factor of Serving cell is 16, channel estimating apparatus is according to the value of the current time slots spreading factor when Serving cell, by in all activated window of at least one cooperation cell and non-reserved window fenestrate be ranked up by the power of window is descending, obtain and activate window sequence, and activating in window sequence the most front activation window of the serial number obtaining estimate amount as supplementary window.

205, channel estimating apparatus will retain window with supplementary window as activating window intersection, according to the window activated in window intersection, obtain channel estimation value.

In step 205, channel estimating apparatus is according to the window activated in window intersection, obtain channel estimation value, can be to obtain channel estimation value according to the fenestrate all of footpath activating in window intersection, can also be that the footpath of each window in activation window intersection is judged by channel estimating apparatus according to channel estimation value, in the fenestrate footpath activating window intersection, obtain effective diameter according to result of determination, obtain channel estimation value according to effective diameter.

Optionally, the footpath of each window in activation window intersection is judged by channel estimating apparatus according to channel estimation value, obtains effective diameter according to result of determination, comprise the following steps in the fenestrate footpath activating window intersection:

Step one: channel estimating apparatus arranges footpath threshold value according to channel estimation value.

Above-mentioned step one can be specifically: the power of overall situation most powerful path is multiplied by the default footpath threshold factor value as footpath thresholding by channel estimating apparatus, selects value minimum in the value of noise gate and the value of footpath thresholding as footpath threshold value.

Step 2: the power in the footpath of each window activated in window intersection is contrasted by channel estimating apparatus with footpath threshold value, is judged to effective diameter by power more than the footpath of footpath threshold value.

The method that the channel that embodiments of the invention provide is estimated, during carrying out channel estimation, apply the window of Serving cell and the window of cooperation cell simultaneously, reduce the False Rate activating window in the environment of multiple cell co-channel interference, and only carry out channel estimation by effective diameter, reduce the error rate that channel is estimated.

Embodiments of the invention also provide for the device 4 that a kind of channel is estimated, it is achieved the method that the channel that said method embodiment provides is estimated, with reference to shown in Fig. 4, including activating window determination module 41, first selects module 42, and second selects module 43 and estimation module 44.

Activate that window determination module 41 is fenestrate for the institute obtaining Serving cell and at least one cooperation cell fenestrate, Serving cell fenestrate and at least one cooperation cell all activated window of fenestrate middle acquisition Serving cell and all activated window of at least one cooperation cell.

First selects module 42 to retain window and non-reserved window for obtaining in all activated window activating the Serving cell that window determination module 41 obtains, wherein, retaining window is all activation windows with Serving cell code channel in Serving cell, and non-reserved window is except all activated window retained outside window in Serving cell.

Second selects module 43 to activate window as supplementary window for obtaining at least one in the first non-reserved window selecting module 42 to obtain and all activated window activating at least one cooperation cell that window determination module 41 obtains.

The supplementary window that the reservation window and second that estimation module 44 obtains for selecting module 42 using first selects module 43 to obtain is as activating window intersection, according to the window activated in window intersection, acquisition channel estimation value.

The device that the channel that embodiments of the invention provide is estimated, during carrying out channel estimation, apply the window of Serving cell and the window of cooperation cell simultaneously, reduce the False Rate activating window in the environment of multiple cell co-channel interference, and then reduce the error rate that channel is estimated.

With reference to shown in Fig. 5, further, activate window determination module 41 and include: initial estimation unit 411 and identifying unit 412.

Initial estimation unit 411 for obtain Serving cell the fenestrate channel estimation value of fenestrate and at least one cooperation cell as channel estimation value, wherein, channel estimation value includes: Serving cell fenestrate and cooperation cell fenestrate in each window the power in footpath, noise power and Serving cell fenestrate and cooperation cell fenestrate in the power of each window.

Further, initial estimation unit 411, specifically be additionally operable to select Serving cell fenestrate and cooperation cell fenestrate in each window footpath in, at least one footpath prominent is as reservation, calculate the meansigma methods of the power in all non-reserved footpaths, using the meansigma methods of the power in all non-reserved footpaths as noise power, wherein, non-reserved footpath is the footpath in addition to retaining footpath.

Identifying unit 412 for the channel estimation value that obtains according to initial estimation unit 411 Serving cell fenestrate and at least one cooperation cell all activated window of fenestrate middle acquisition Serving cell and all activated window of cooperation cell.

Further, as shown in Figure 6, it is determined that unit 412 includes: most powerful path judgment sub-unit 4121, window power threshold subelement 4122, noise gate subelement 4123, threshold value subelement 4124, labelling subelement 4125.

Most powerful path judgment sub-unit 4121 for according to Serving cell fenestrate and at least one cooperation cell fenestrate in the power in footpath of each window, Serving cell fenestrate and each window of at least one cooperation cell chooses a prominent footpath as most powerful path.

The power of overall situation most powerful path, for choosing prominent most powerful path in all of most powerful path that most powerful path judgment sub-unit 4121 is chosen as overall situation most powerful path, is multiplied by the default window power threshold factor value as window power threshold by window power threshold subelement 4122.

Noise gate subelement 4123 for being multiplied by the default noise gate factor value as noise gate using noise power.

Optionally, noise gate subelement 4123 can be also used for value noise power being multiplied by the default Serving cell noise gate factor as Serving cell noise gate, noise power is multiplied by the default cooperation cell noise gate factor value as cooperation cell noise gate, selects value maximum in the value of Serving cell noise gate and the value of cooperation cell noise gate as the value of noise gate.

Value maximum in the value of the noise gate that the value of the window power threshold that threshold value subelement 4124 is chosen for selecting reception window power threshold subelement 4122 and noise gate subelement 4123 obtain is as threshold value.

Labelling subelement 4125 for by Serving cell fenestrate and at least one cooperation cell fenestrate in the threshold value chosen with threshold value subelement 4124 respectively of the power of each window contrast, each power is marked more than the window of threshold value, using window labeled in Serving cell as the activation window of Serving cell, using window labeled in cooperation cell as the activation window of at least one cooperation cell.

Optionally, with reference to shown in Fig. 5, second selects module 43, including: counting unit 431, initial value acquiring unit 432 and supplementary window select unit 433.

Counting unit 431, for obtaining the quantity of reservation window, calculates the difference of quantity and the predetermined number retaining window, using the absolute value of the quantity retaining window and the difference of predetermined number as estimate amount.

Initial value acquiring unit 432 is the power of each window in all activated window obtaining at least one cooperation cell and non-reserved window.

Supplement window select unit 433 for obtain according to initial value acquiring unit 432 all activated window of cooperation cell and non-reserved window in the power of each window, all activated window of non-reserved window and cooperation cell obtains the prominent activation window of the estimate amount that counting unit 431 obtains as supplementary window.

Further, with reference to shown in Fig. 7, supplement window and select unit 433 to include sorting subelement 4331 and selecting subelement 4332.

Sequence subelement 4331, for being ranked up fenestrate for the institute in all activated window of at least one cooperation cell and non-reserved window by the power of window is descending, obtains activation window sequence.

Subelement 4332 is selected window sequence to obtain the most front activation window of the serial number of estimate amount as supplementary window for activating of obtaining at sequence subelement 4331.

Optionally, second selects module 43, also particularly useful for: the value of the current time slots spreading factor of detection Serving cell.

According to the value of the current time slots spreading factor when Serving cell, using channel impulse response head window as supplementary window.

Or, value according to the current time slots spreading factor when Serving cell, by in all activated window of at least one cooperation cell and non-reserved window fenestrate be ranked up by the power of window is descending, obtain and activate window sequence, and activating in window sequence the most front activation window of the serial number obtaining estimate amount as supplementary window.

Optionally, with reference to shown in Fig. 5, estimation module 44 includes: effective diameter acquiring unit 441 and estimation unit 442.

Effective diameter acquiring unit 441, for judging the footpath of each window in activation window intersection according to the channel estimation value activating window determination module 141 acquisition, obtains effective diameter according to result of determination in the fenestrate footpath activating window intersection.

Further, with reference to shown in Fig. 8, effective diameter acquiring unit 441 includes: arrange subelement 4411 and effective diameter obtains subelement 4412.

Subelement 4411 is set for arranging footpath threshold value according to the channel estimation value activating window determination module 141 acquisition.

Concrete, subelement 4411 is set the power activating the overall most powerful path chosen that window determination module 141 obtains is multiplied by the default footpath threshold factor value as footpath thresholding, select value minimum in the value of noise gate and the value of footpath thresholding as footpath threshold value.

Effective diameter obtains subelement 4412 for being contrasted with arranging the footpath threshold value that subelement 4411 obtains by the power in the footpath of each window activated in window intersection, more than the footpath of footpath threshold value, power is judged to effective diameter, obtains all effective diameteies.

The effective diameter that estimation unit 442 obtains for effective diameter acquiring unit 441 obtains channel estimation value.

The device that the channel that embodiments of the invention provide is estimated, during carrying out channel estimation, apply the window of Serving cell and the window of cooperation cell simultaneously, reduce the False Rate activating window in the environment of multiple cell co-channel interference, simultaneously, use effective diameter to carry out channel estimation, reduce the error rate that channel is estimated.

Another embodiment of the present invention provides the device 9 that a kind of channel is estimated, its structure is with reference to shown in Fig. 9, the device 9 that this channel is estimated includes: at least one processor 91, data/address bus 92, memorizer 93 and COM1 94, at least one processor 91, memorizer 93 connect and complete mutual communicating, wherein with COM1 94 by data/address bus 92:

This data/address bus 92 can be industry standard architecture isa bus, external equipment interconnection pci bus or extended industry-standard architecture eisa bus etc..This data/address bus 92 can be divided into address bus, data/address bus, control bus etc..For ease of representing, Fig. 9 only represents with a thick line, it is not intended that an only bus or a type of bus.

Memorizer 93 is used for storing executable program code and corresponding data, and this program code includes computer-managed instruction.Memorizer 93 may comprise high-speed RAM memorizer, it is also possible to also including nonvolatile memory, memorizer at least includes activating window decision algorithm in the present invention.

Processor 91 is probably a central processor CPU, or specific integrated circuit ASIC, or is configured to implement one or more integrated circuits of the embodiment of the present invention.

COM1 94, for realizing device 9 and the exchange of extraneous data that channel is estimated.

Processor 91, is additionally operable to call the program code in memorizer 93, in order to perform to activate in said apparatus embodiment window determination module 91, first selects module 92, second selects module 93 and the operation of estimation module 94, specifically describes the device embodiment corresponding with reference to Fig. 5, repeats no more here.

Through the above description of the embodiments, those skilled in the art is it can be understood that can realize with hardware to the present invention, or firmware realizes, or combinations thereof mode realizes.When implemented in software, above-mentioned functions can be stored in computer-readable medium or is transmitted as the one or more instructions on computer-readable medium or code.Computer-readable medium includes computer-readable storage medium and communication media, and wherein communication media includes any medium being easy to transmit computer program to another place from a place.Storage medium can be any usable medium that computer can access.As example but be not limited to: computer-readable medium can include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, magnetic disk storage medium or other magnetic storage apparatus or can be used in carrying or store and have instruction or the desired program code of data structure form can be by any other medium of computer access.In addition.Any connection can be suitable become computer-readable medium.Such as, if software be use coaxial cable, optical fiber cable, twisted-pair feeder, Digital Subscriber Line (DSL) or such as infrared ray, radio and microwave etc wireless technology from website, server or other remote source, then the wireless technology of coaxial cable, optical fiber cable, twisted-pair feeder, DSL or such as infrared ray, wireless and microwave etc be included in affiliated medium fixing in.As used in the present invention, dish (Disk) and dish (disc) include compressing laser disc (CD), laser dish, laser disc, Digital Versatile Disc (DVD), floppy disk and Blu-ray Disc, the duplication data of the usual magnetic of its mid-game, dish then carrys out the duplication data of optics with laser.Within above combination above should also be as being included in the protection domain of computer-readable medium.

In a word, the foregoing is only the preferred embodiment of technical solution of the present invention, be not intended to limit protection scope of the present invention.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.

Claims

1. the method that a channel is estimated, it is characterised in that including:

Described channel estimating apparatus obtains reservation window and non-reserved window in all activated window of described Serving cell, described reservation window is the activation window having the code channel of Serving cell corresponding in Serving cell, and described non-reserved window is except all activated window retained outside window in Serving cell；

The method that channel the most according to claim 1 is estimated, it is characterized in that, described channel estimating apparatus Serving cell fenestrate and at least one cooperation cell all activated window of the fenestrate described Serving cell of middle acquisition and all activated window of at least one cooperation cell, including:

Channel the most according to claim 1 and 2 estimate method, it is characterised in that described channel estimating apparatus obtain in all activated window of described non-reserved window and at least one cooperation cell described at least one activate window as supplementary window, specifically include:

The method that channel the most according to claim 3 is estimated, it is characterized in that, described channel estimating apparatus obtains the prominent activation window of described estimate amount as supplementary window in all activated window of described non-reserved window and at least one cooperation cell described, including:

Channel the most according to claim 1 estimate method, it is characterised in that described channel estimating apparatus obtain in all activated window of described non-reserved window and at least one cooperation cell described at least one activate window as supplementary window, specifically include:

Or,

The method that channel the most according to claim 2 is estimated, it is characterized in that, described channel estimating apparatus according to described channel estimation value described Serving cell fenestrate and at least one cooperation cell all activated window of the fenestrate described Serving cell of middle acquisition and all activated window of cooperation cell, including:

The method that channel the most according to claim 6 is estimated, it is characterised in that described reservation window and supplementary window as activating window intersection, according to the window in described activation window intersection, are obtained channel estimation value by described channel estimating apparatus, including:

The method that channel the most according to claim 7 is estimated, it is characterized in that, the footpath of each window in described activation window intersection is judged by described channel estimating apparatus according to described channel estimation value, in the fenestrate footpath of described activation window intersection, effective diameter is obtained according to result of determination, including:

The method that channel the most according to claim 8 is estimated, it is characterised in that described channel estimating apparatus arranges footpath threshold value according to channel estimation value, including:

Channel the most according to claim 2 estimate method, it is characterised in that described channel estimating apparatus obtain described Serving cell the fenestrate and fenestrate noise power of cooperation cell, including:

The method that 11. channels according to claim 6 are estimated, it is characterised in that described noise power is multiplied by the default noise gate factor value as noise gate by described channel estimating apparatus, including:

The device that 12. 1 kinds of channels are estimated, it is characterised in that including: activating window determination module, first selects module, and second selects module and estimation module；

The device that 13. channels according to claim 12 are estimated, it is characterised in that described activation window determination module, including initial estimation unit and identifying unit；

14. devices estimated according to the channel described in claim 12 or 13, it is characterised in that described second selects module to include: counting unit, initial value acquiring unit and supplementary window select unit；

The device that 15. channels according to claim 14 are estimated, it is characterised in that described supplementary window selects unit, including sequence subelement and selection subelement；

The device that 16. channels according to claim 12 are estimated, it is characterised in that described second selects module, also particularly useful for:

Or,

The device that 17. channels according to claim 13 are estimated, it is characterised in that described identifying unit includes: most powerful path judgment sub-unit, window power threshold subelement, noise gate subelement, threshold value subelement, labelling subelement；

The device that 18. channels according to claim 17 are estimated, it is characterised in that described estimation module includes: effective diameter acquiring unit and estimation unit；

The device that 19. channels according to claim 18 are estimated, it is characterised in that described effective diameter acquiring unit includes: subelement is set and effective diameter obtains subelement；

20. channels according to claim 19 estimate device, it is characterised in that described arrange subelement specifically for:

The device that 21. channels according to claim 13 are estimated, it is characterised in that described initial estimation unit, specifically for:

The device that 22. channels according to claim 17 are estimated, it is characterised in that