CN102195904A - Processing method and equipment for common-frequency channel estimation algorithm - Google Patents
Processing method and equipment for common-frequency channel estimation algorithm Download PDFInfo
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- CN102195904A CN102195904A CN2010101292193A CN201010129219A CN102195904A CN 102195904 A CN102195904 A CN 102195904A CN 2010101292193 A CN2010101292193 A CN 2010101292193A CN 201010129219 A CN201010129219 A CN 201010129219A CN 102195904 A CN102195904 A CN 102195904A
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Abstract
The invention discloses a processing method and processing equipment for a common-frequency channel estimation algorithm. The method comprises the following steps of: obtaining single-code set channel estimation results of each selected cell according to a received pilot signal; pre-screening all taps of all the cells according to an effective tap judgment threshold value to obtain effective taps; performing interference cancellation iteration for many times according to the most iteration times; and obtaining channel estimation results of a plurality of code sets after interference cancellation is performed for many times according to the most iteration times, wherein the iteration of each time comprises the acquisition of the tap with the highest power from the pre-screened effective taps and the calculation and elimination of the interference of the tap on all the other taps. By the method and the equipment, the searching range of the tap with the highest power is narrowed in the interference cancellation iteration of each time by judging the effective taps in advance, and comparison and selection are only required to be performed among all the effective taps, so the calculated amount of the algorithm can be reduced.
Description
Technical field
The present invention relates to mobile communication technology, particularly a kind of with frequency algorithm channel estimation process method and apparatus.
Background technology
Existing many yards collection channel estimation methods are a kind of many yards collection channel estimation methods that adopt counteracting serial interference thought, specifically can number be 200510075205.7 patent with reference to Chinese patent application, promptly, result to solid size collection channel estimating adjudicates, form the fundamental component of interference signal, and from solid size collection channel estimation results, deduct this interference.Interference Cancellation can iteration repeatedly, thereby reach interference eliminated effect preferably.Fig. 1 is many yards collection channel estimation methods schematic flow sheets in the prior art, and as shown in the figure, this algorithm mainly comprises following steps:
The pilot signal that utilization receives obtains the solid size collection channel estimation results of each selected sub-district.
Calculate each tap power of each cell channel estimated result, obtain wherein prominent tap.
The interference that it is estimated other cell channel is calculated in the maximum power tap that utilizes step 102 to obtain.
From other cell channel estimated result, deduct the interference that step 103 is calculated.
Through obtaining the channel estimation results of a plurality of yards final collection after the interference eliminated repeatedly.
By such scheme as can be seen, existing computing expenses with many yards collection of frequency channel estimation methods mainly contain 4, the first solid size collection channel estimating; Choosing of the second maximum power tap; The 3rd interference calculation; The 4th Interference Cancellation.Because each Interference Cancellation iteration need be chosen the maximum tap of power in all taps of all selected sub-districts, and the interference of all taps of this tap all selected sub-districts to other all eliminated, so the deficiencies in the prior art just are: when more or iterations was big when the sub-district number, operand can be very considerable.
Summary of the invention
The invention provides a kind of algorithm of frequency together channel estimation process method and apparatus, in order to reduce with the operands in many yards collection of the frequency channel estimating.
Provide a kind of in the embodiment of the invention, comprised the steps: with frequency algorithm channel estimation process method
Obtain the solid size collection channel estimation results of each selected sub-district according to the pilot signal that receives;
According to effective tap decision rule all taps of all sub-districts are carried out obtaining effective tap behind the prescreen;
Carry out repeatedly Interference Cancellation iteration by maximum iteration time, each iteration comprises: obtain prominent tap from effective tap that prescreen goes out, calculate and eliminate the interference of this tap to other all taps;
After carrying out repeatedly Interference Cancellation, obtain the channel estimation results of a plurality of yards collection by maximum iteration time.
Preferably, prescreen is carried out in all taps of all sub-districts, comprising according to effective tap decision rule:
Effective tap of screening Target cell, as effectively tap, other taps are as invalid tap with all taps in the actual window of using;
Screen effective tap of adjacent sub-district, will judge the effectively tap of effective tap conduct of thresholding, will judge that effective tap of thresholding is as invalid tap less than tap greater than tap; Or, according to the window use information of adjacent sub-district prescreen is carried out in all taps of all sub-districts.
Preferably, described tap judges that thresholding is definite according to tap power maximum in the actual window of using of Target cell, and/or, determine according to noise and interference power measured value.
Preferably, determine described tap judgement thresholding according to tap power maximum in the actual window of using of Target cell in the following manner:
The tap decision gate is limited to
Wherein: P
MaxThe tap power of maximum in the window of using for Target cell is actual, Thre_Peak_dB is to be the power factor of unit with dB.
Preferably, determine described tap judgement thresholding according to noise and interference power measured value in the following manner: the tap decision gate is limited to
Wherein: δ
n 2Be noise and interference power measured value, Thre_ISCP_dB is to be the power factor of unit with dB.
Provide a kind of in the embodiment of the invention, having comprised with frequency algorithm channel estimation process equipment:
Solid size collection module is used for obtaining according to the pilot signal that receives the solid size collection channel estimation results of each selected sub-district;
The prescreen module is used for according to effective tap decision rule all taps of all sub-districts being carried out obtaining effective tap behind the prescreen;
The Interference Cancellation module is used for carrying out repeatedly Interference Cancellation iteration by maximum iteration time, and each iteration comprises: obtain prominent tap from effective tap that prescreen goes out, calculate and eliminate the interference of this tap to other all taps;
Many yards collection modules are used for after carrying out repeatedly Interference Cancellation by maximum iteration time, obtain the channel estimation results of a plurality of yards collection.
Preferably, the prescreen module comprises:
Target cell prescreen unit, the effective tap that is used to screen Target cell, as effectively tap, other taps are as invalid tap with all taps in the actual window of using;
Prescreen unit, adjacent sub-district, be used to screen effective tap of adjacent sub-district, to judge that effective tap of thresholding is as effectively tap greater than tap, to judge that effective tap of thresholding is as invalid tap less than tap, or, according to the window use information of adjacent sub-district prescreen is carried out in all taps of all sub-districts.
Preferably, prescreen unit, adjacent sub-district comprises: first subelement and/or second subelement, wherein:
First subelement is used for according to the maximum tap power of the actual window of using of Target cell;
Second subelement is used for determining described tap judgement thresholding according to noise and interference power measured value.
Preferably, second subelement is further used for determining described tap judgement thresholding according to tap power maximum in the actual window of using of Target cell in the following manner:
The tap decision gate is limited to
Wherein: P
MaxThe tap power of maximum in the window of using for Target cell is actual, Thre_Peak_dB is to be the power factor of unit with dB.
Preferably, second subelement is further used for determining described tap judgement thresholding according to noise and interference power measured value in the following manner:
The tap decision gate is limited to
Wherein: δ
n 2Be noise and interference power measured value, Thre_ISCP_dB is to be the power factor of unit with dB.
Beneficial effect of the present invention is as follows:
In the same frequency algorithm channel estimation process process that the embodiment of the invention provides, behind the solid size collection channel estimation results that obtains each selected sub-district, just all taps of all sub-districts are carried out obtaining effective tap behind the prescreen according to effective tap decision rule; So only carry out repeatedly Interference Cancellation iteration by maximum iteration time from the tap that prescreen goes out, each iteration comprises: obtain prominent tap from effective tap that prescreen goes out, calculate and eliminate the interference of this tap to other all taps; After carrying out repeatedly Interference Cancellation, just obtain the channel estimation results of a plurality of yards collection then by maximum iteration time.Owing to estimate that at existing channel introducing is to the judgment mechanism of effective tap in the elimination algorithm; By prejudging effective tap, dwindled the hunting zone of maximum power tap in each Interference Cancellation iteration, and then can only be used in all effective taps and compare and select, also therefore can reach the purpose that reduces algorithm operation quantity.
Description of drawings
Fig. 1 is many yards collection channel estimation methods schematic flow sheets in the prior art;
Fig. 2 is with frequency algorithm channel estimation process method implementing procedure schematic diagram in the embodiment of the invention;
Fig. 3 is with frequency algorithm channel estimation process device structure schematic diagram in the embodiment of the invention.
Embodiment
The inventor notices in the invention process: because solid size collection channel estimating is the basis of many yards collection channel estimating, and existing solid size collection channel estimation method expense is very little, interference calculation simultaneously and Interference Cancellation are the direct approach of recovering than purified signal, its operand can not omit, therefore, if the operand that tap is chosen at maximum power is simplified, can effectively reduce the operand that multi-cell channel is estimated.
Given this, in technical scheme provided by the invention, earlier solid size collection channel estimation results is optimized selection, judge those and have tap position high probability, that have interference signal, in follow-up Interference Cancellation iterative process, only from the higher tap group of the probability of these existence interference, select the maximum power tap then, so just the number of comparisons that tap is chosen in each iteration be can significantly reduce, thereby optimization, reduction operand expense realized channel estimation method.Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
Fig. 2 is with frequency algorithm channel estimation process method implementing procedure schematic diagram, as shown in the figure, comprises the steps:
The pilot signal that step 201, basis receive obtains the solid size collection channel estimation results of each selected sub-district;
In the enforcement, carry out earlier from effective tap that prescreen goes out, obtaining prominent tap, and the prominent tap of obtaining carried out Interference Cancellation, from effective tap that prescreen goes out, obtain prominent tap by maximum iteration time execution repeatedly then, and the prominent tap of obtaining carried out Interference Cancellation, just step 203; Up to executing the desired Interference Cancellation of maximum iteration time.The maximum power tap is not only need repeatedly select once before the Interference Cancellation iteration, and iteration is all used the maximum tap of same power at every turn; But the maximum tap of power will be reselected when each iteration, because through after Interference Cancellation iteration, prominent tap position and power thereof all might change.The concrete execution mode of step 203 can also be referring to the enforcement to 105 of the step 102 of Fig. 1, but for a person skilled in the art, the concrete mode that judges whether to arrive maximum iteration time only is a kind of possibility that realizes, in fact, as long as can finish the Interference Cancellation of maximum iteration time.
In the enforcement, in step 201, determine that effective tap decision rule is to be used for prescreen is carried out in all taps of all sub-districts, reduce the purpose that operand is chosen in the maximum power tap to reach.
Also will provide below determining the embodiment of effective tap decision rule, but, in concrete the enforcement, judgment mode with other also is fine, effectively the effect of tap decision rule is the lower-powered non-useful signal tap of filtering as far as possible accurately, therefore, as long as can reach this effect, also can determine this criterion by emulation or by modes such as empirical values.Below definite mode of criterion only be used to instruct those skilled in the art specifically how to implement the present invention, but do not mean the mode that only can use in following examples to be lifted, can need come to determine the corresponding judgment mode in conjunction with practice in the implementation process.
In the enforcement, when prescreen is carried out in all taps of all sub-districts, can comprise according to effective tap decision rule:
Effective tap of screening Target cell, as effectively tap, other taps are as invalid tap with all taps in the actual window of using;
Screen effective tap of adjacent sub-district, will judge the effectively tap of effective tap conduct of thresholding, will judge that effective tap of thresholding is as invalid tap less than tap greater than tap; Or, according to the window use information of adjacent sub-district prescreen is carried out in all taps of all sub-districts.
Concrete, when the effective tap in each sub-district of judgement, the decision rule of Target cell and the effective tap in adjacent sub-district can be different:
Effective tap of Target cell judges that according to Target cell resource actual allocated situation promptly, all taps in the actual distribution window of using all are labeled as effective tap, other taps all are changed to invalid tap;
Effective tap of adjacent sub-district judges that according to tap thresholding defines the effect tap.
After generating effective tap information set, then only in these effective taps, choose the peak power tap in the subsequent interference eliminating.
From top enforcement as can be seen, be compared to prior art,, can increase some amounts of calculation even increased effective tap prescreen process at the channel estimation method of simplifying.But in fact relatively from the successive iterations process, owing to only need from effective tap, choose the maximum power tap, thereby can significantly reduce the calculating and the comparison procedure of tap power, especially under the more situation of iterations, the minimizing of amount of calculation is quite huge.
So, this shows also that effectively the accuracy of tap judgement is exactly the key of optimized Algorithm, because if omitted real signal tap in effective tap of selecting, will reduce the performance of algorithm like this; Otherwise,, just do not reach the purpose that reduces amount of calculation if effectively comprise a lot of false taps in the tap.
In the enforcement, can use information that prescreen is carried out in all taps of all sub-districts according to the window of adjacent sub-district.So, use information if can obtain the window of whole adjacent sub-districts in force, then be undoubtedly optimal scheme, the interference signal that so just can know adjacent community user is in which window, as long as disturb with the tap response restoring signal in these actual windows that use, just can accurately recover and eliminate interference.
But in concrete implementation process, accomplish Real-Time Sharing window assignment information between the base station, can increase the base station information treating capacity undoubtedly, increase communications burden to the base station.Can't know that in the base station other adjacent sub-district windows use under the situation of information so provided two kinds below, effectively disturb the scheme of tap judgement, be mainly used in and judge adjacent sub-district effective tap.
The tap power threshold is set, the power of all taps of adjacent sub-district is compared with thresholding respectively, power is thought effective tap greater than the tap of thresholding, otherwise thinks invalid tap.
Being provided with of tap power threshold can have multiple scheme, as long as just can judge whether it is effective tap based on power guidelines, describes with two examples below:
1), tap judgement thresholding is determined tap judgement thresholding according to tap power maximum in the actual window of using of Target cell;
And/or,
2), determine tap judgement thresholding according to noise and interference power measured value.
Describe respectively below.
1), can determine described tap judgement thresholding according to tap power maximum in the actual window of using of Target cell in the following manner:
The tap decision gate is limited to
Wherein: P
MaxThe tap power of maximum in the window of using for Target cell is actual, Thre_Peak_dB is to be the power factor of unit with dB.
Concrete, can the maximum tap power setting in based target sub-district thresholding.In real network, Target cell user's power accounts for the major part of received signal gross power usually, and the Target cell user uses the assignment information of window to predict, so maximum tap power reliability is higher in the window of the actual use of Target cell, and note is made P
MaxAs benchmark, effectively the tap power threshold is set to
Wherein Thre_Peak_dB is to be the power factor of unit with dB, can determine by emulation.This effective tap power guidelines can be strong with power, be enough to cause the most of adjacent sub-district tap of interference to select to this cell signal, and those lower-powered adjacent sub-district taps can be ignored.
2), can determine described tap judgement thresholding according to noise and interference power measured value in the following manner:
The tap decision gate is limited to
Wherein: δ
n 2Be noise and interference power measured value, Thre_ISCP_dB is to be the power factor of unit with dB.
Concrete, can thresholding be set based on noise power.According to whether there being multipath signal, the resulting tap of solid size collection channel estimating can be divided into two classes: signal tap and noise tap, wherein, signal tap is the stack of signal multipath component, noise and presence of intercell interference three parts, and the noise tap only comprises noise and presence of intercell interference two parts, noise and interference power measured value are to the measured value of suffered noise in each sub-district and the residual interference gross power that can't eliminate by joint-detection, comprise Target cell and adjacent sub-district.Because signal tap comprises the signal multipath component, therefore its power can be provided with effective tap thresholding based on noise and the interference power measured apparently higher than the noise tap usually, thereby with noise tap filtering as far as possible, and only stick signal tap.Suppose that noise and interference power measured value note makes δ
n 2, tap power threshold so is set to
Wherein Thre_ISCP_dB is to be the power factor of unit with dB, can determine by emulation.
Further, effectively above 2 thresholdings can also be used in combination in the tap decision rule, effectively tap power satisfies the requirement of 2 thresholdings simultaneously.Can utilize the effect of above 2 thresholdings so simultaneously, both filter out the useful signal tap as much as possible, again can filtering most of noise tap, thus further reduce effective tap number, reduce operand.
Whether in the enforcement, just can judge based on power guidelines is effective tap, and power guidelines is also expected than being easier to for a person skilled in the art, and scheme is also all fairly simple.Except the above embodiments, also can adopt some other processing mode, for example, constantly judgement before effective tap court verdict enterprising trade in basis of the previous moment of current time, promptly, previous moment has been judged to the tap position of effective tap, if satisfy certain thresholding at current time, then still is judged to effective tap.
Based on same inventive concept, also provide a kind of in the embodiment of the invention with frequency algorithm channel estimation process equipment, because the principle that this equipment is dealt with problems is to similar with frequency algorithm channel estimation process method, so the enforcement of this equipment can repeat part and repeat no more referring to the enforcement of method.
Fig. 3 is with frequency algorithm channel estimation process device structure schematic diagram, as shown in the figure, can comprise in the equipment:
Solid size collection module 301 is used for obtaining according to the pilot signal that receives the solid size collection channel estimation results of each selected sub-district;
Many yards collection modules 304 are used for after carrying out repeatedly Interference Cancellation by maximum iteration time, obtain the channel estimation results of a plurality of yards collection.
In the enforcement, the prescreen module can comprise:
Target cell prescreen unit, the effective tap that is used to screen Target cell, as effectively tap, other taps are as invalid tap with all taps in the actual window of using;
Prescreen unit, adjacent sub-district, be used to screen effective tap of adjacent sub-district, to judge that effective tap of thresholding is as effectively tap greater than tap, to judge that effective tap of thresholding is as invalid tap less than tap, or, according to the window use information of adjacent sub-district prescreen is carried out in all taps of all sub-districts.
In the enforcement, prescreen unit, adjacent sub-district can comprise: first subelement and/or second subelement, wherein:
First subelement is used for determining described tap judgement thresholding according to the maximum tap power of the actual window of using of Target cell;
Second subelement is used for determining described tap judgement thresholding according to noise and interference power measured value.
In the enforcement, first subelement can be further used for determining described tap judgement thresholding according to tap power maximum in the actual window of using of Target cell in the following manner:
The tap decision gate is limited to
Wherein: P
MaxThe tap power of maximum in the window of using for Target cell is actual, Thre_Peak_dB is to be the power factor of unit with dB.
In the enforcement, second subelement can be further used for determining described tap judgement thresholding according to noise and interference power measured value in the following manner:
The tap decision gate is limited to
Wherein: δ
n 2Be noise and interference power measured value, Thre_ISCP_dB is to be the power factor of unit with dB.
For the convenience of describing, the each several part of the above device is divided into various modules with function or the unit is described respectively.Certainly, when enforcement is of the present invention, can in same or a plurality of softwares or hardware, realize the function of each module or unit.
As seen from the above-described embodiment, in technical scheme provided by the invention, estimate that at existing channel introducing is to the judgment mechanism of effective tap in the elimination algorithm; Judge in advance by effective tap, dwindle the hunting zone of maximum power tap in each Interference Cancellation iteration, thereby reach the purpose that reduces algorithm operation quantity;
The judgment criterion scheme of multiple tap thresholding further, also is provided.
Technical scheme provided by the invention can keep stronger useful signal tap by effective tap anticipation, simultaneously the filtering noise tap.Like this, can effectively reduce the computing expense of Interference Cancellation iterative process on the one hand, reduce the base station and handle burden; Avoid the mis-behave that brings on the other hand because the noise tap is mistaken for that signal tap participates in Interference Cancellation.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. the same method of algorithm channel estimation process frequently is characterized in that, comprises the steps:
Obtain the solid size collection channel estimation results of each selected sub-district according to the pilot signal that receives;
According to effective tap decision rule all taps of all sub-districts are carried out obtaining effective tap behind the prescreen;
Carry out repeatedly Interference Cancellation iteration by maximum iteration time, each iteration comprises: obtain prominent tap from effective tap that prescreen goes out, calculate and eliminate the interference of this tap to other all taps;
After carrying out repeatedly Interference Cancellation, obtain the channel estimation results of a plurality of yards collection by maximum iteration time.
2. the method for claim 1 is characterized in that, according to effective tap decision rule prescreen is carried out in all taps of all sub-districts, comprising:
Effective tap of screening Target cell, as effectively tap, other taps are as invalid tap with all taps in the actual window of using;
Screen effective tap of adjacent sub-district, will judge the effectively tap of effective tap conduct of thresholding, will judge that effective tap of thresholding is as invalid tap less than tap greater than tap; Or, according to the window use information of adjacent sub-district prescreen is carried out in all taps of all sub-districts.
3. method as claimed in claim 2 is characterized in that, described tap judges that thresholding is definite according to tap power maximum in the actual window of using of Target cell, and/or, determine according to noise and interference power measured value.
4. method as claimed in claim 3 is characterized in that, determines described tap judgement thresholding according to tap power maximum in the actual window of using of Target cell in the following manner:
The tap decision gate is limited to
Wherein: P
MaxThe tap power of maximum in the window of using for Target cell is actual, Thre_Peak_dB is to be the power factor of unit with dB.
5. method as claimed in claim 3 is characterized in that, determines described tap judgement thresholding according to noise and interference power measured value in the following manner:
The tap decision gate is limited to
Wherein: δ
n 2Be noise and interference power measured value, Thre_ISCP_dB is to be the power factor of unit with dB.
6. the same equipment of algorithm channel estimation process frequently is characterized in that, comprising:
Solid size collection module is used for obtaining according to the pilot signal that receives the solid size collection channel estimation results of each selected sub-district;
The prescreen module is used for according to effective tap decision rule all taps of all sub-districts being carried out obtaining effective tap behind the prescreen;
The Interference Cancellation module is used for carrying out repeatedly Interference Cancellation iteration by maximum iteration time, and each iteration comprises: obtain prominent tap from effective tap that prescreen goes out, calculate and eliminate the interference of this tap to other all taps;
Many yards collection modules are used for after carrying out repeatedly Interference Cancellation by maximum iteration time, obtain the channel estimation results of a plurality of yards collection.
7. equipment as claimed in claim 6 is characterized in that, the prescreen module comprises:
Target cell prescreen unit, the effective tap that is used to screen Target cell, as effectively tap, other taps are as invalid tap with all taps in the actual window of using;
Prescreen unit, adjacent sub-district, be used to screen effective tap of adjacent sub-district, to judge that effective tap of thresholding is as effectively tap greater than tap, to judge that effective tap of thresholding is as invalid tap less than tap, or, according to the window use information of adjacent sub-district prescreen is carried out in all taps of all sub-districts.
8. equipment as claimed in claim 7 is characterized in that, prescreen unit, adjacent sub-district comprises: first subelement and/or second subelement, wherein:
First subelement is used for determining described tap judgement thresholding according to the maximum tap power of the actual window of using of Target cell;
Second subelement is used for determining described tap judgement thresholding according to noise and interference power measured value.
9. equipment as claimed in claim 8 is characterized in that, first subelement is further used for determining described tap judgement thresholding according to tap power maximum in the actual window of using of Target cell in the following manner:
The tap decision gate is limited to
Wherein: P
MaxThe tap power of maximum in the window of using for Target cell is actual, Thre_Peak_dB is to be the power factor of unit with dB.
10. equipment as claimed in claim 8 is characterized in that, second subelement is further used for determining described tap judgement thresholding according to noise and interference power measured value in the following manner:
The tap decision gate is limited to
Wherein: δ
n 2Be noise and interference power measured value, Thre_ISCP_dB is to be the power factor of unit with dB.
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| CN2010101292193A CN102195904A (en) | 2010-03-18 | 2010-03-18 | Processing method and equipment for common-frequency channel estimation algorithm |
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| CN2010101292193A CN102195904A (en) | 2010-03-18 | 2010-03-18 | Processing method and equipment for common-frequency channel estimation algorithm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103795658A (en) * | 2012-10-26 | 2014-05-14 | 美国博通公司 | Hybrid multi-cell channel estimation |
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| US20060223479A1 (en) * | 2005-04-05 | 2006-10-05 | Stanners Steven P | Separation of cochannel FM signals |
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| CN1124544A (en) * | 1994-01-27 | 1996-06-12 | 艾利森·Ge·流动通讯有限公司 | Method and system for demodulation of downlink CDMA signals |
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| US20060223479A1 (en) * | 2005-04-05 | 2006-10-05 | Stanners Steven P | Separation of cochannel FM signals |
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| CN103795658A (en) * | 2012-10-26 | 2014-05-14 | 美国博通公司 | Hybrid multi-cell channel estimation |
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Application publication date: 20110921 |