CN102904605A - Method and device for determining multipath information and rake receiver - Google Patents
Method and device for determining multipath information and rake receiver Download PDFInfo
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- CN102904605A CN102904605A CN2012103617517A CN201210361751A CN102904605A CN 102904605 A CN102904605 A CN 102904605A CN 2012103617517 A CN2012103617517 A CN 2012103617517A CN 201210361751 A CN201210361751 A CN 201210361751A CN 102904605 A CN102904605 A CN 102904605A
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Abstract
The invention discloses a method and a device for determining multipath information and a rake receiver. The method comprises the following steps: acquiring a first path information set and a second path information set according to received wireless signals which are transmitted from a mobile station to a base station and transmitted through multiple paths, and executing successively according to the preset order specific to the first path corresponding to each first path information in the first path information set; selecting a second path nearest to the first path from the second path information set; determining a third path information set according to the distance between the first path and the second path, wherein the third path information set comprises at least one first path position information and/or at least one second path position information; and using the obtained third path information set as the determined multipath information and outputting the third path information set. Therefore, the accuracy for determining the multipath information can be improved.
Description
Technical field
The present invention relates to wireless communication technology field, especially relate to a kind of method and device of definite multipath information.
Background technology
In the wireless channel communication environments, wireless signal is called as multipath from transmitting antenna through the propagation phenomenon that a plurality of paths arrive reception antenna.Owing to be subject to the impact of multipath transmisstion, the signal that travelling carriage sends to the base station can arrive the base station through different transmission paths.In code division multiple access (CDMA, Code Division Multiple Access) communication system, utilize the different decline of each transmission path and delay, the method that merges by multipath improves systematic function.In cdma communication system, the accurate location of signal transmission path is determining the performance of communication system.
In the prior art, in order to reduce the expense of amount of calculation, generally adopt following two kinds of methods to come transmission path is managed:
First kind of way: adopt the mode of Multipath searching to determine multipath information.The reference signal of sending by reference signal and the terminal of this locality storage is concerned with and noncoherent accumulation calculating, thereby obtain retarding power (PDP, Power Delay Profile), then determines path position according to the peak value among the PDP, finally obtain the footpath information output.But in the Multipath searching process, it generally is that 2 times of mistakes are adopted that the mistake of Multipath searching is adopted multiple, when two footpaths during close proximity, (peak value of namely selecting in retarding power is certain position, centre in two footpaths fat footpath phenomenon can to occur, rather than the true path position in two footpaths), if fat footpath is not processed, then the possibility of result of Multipath searching has the deviation of 1/2 chip (chip) with real path position maximum, so the accuracy of the footpath information of determining is lower.
The second way: adopt the mode of multipath tracking to determine multipath information.Multipath tracking refers to existing footpath is followed the tracks of, and according to tracking results, determines the particular location in footpath.The precision of multipath tracking high (can be interpolated into 1/8chip), when two footpath close proximity, the results that follow the tracks of in two footpaths can merge on the footpath.But in the multipath tracking process, the possibility of result that follow the tracks of in strong footpath and inferior strong footpath is all incorrect, all needs to adjust by certain criterion.If do not use bearing calibration between the multipath tracking, just the footpath information with Multipath searching is as the criterion when multipath tracking surpasses certain limit, this all is that result with Multipath searching is as the criterion when causing descrambling and de-spreading many times, because the error of Multipath searching is larger, so cause the footpath tracking performance to descend.
From the above, the result that the mode of employing Multipath searching obtains is long-term statistics, but owing to be that 2 times of mistakes are adopted, so there is the confidence level height in footpath near its path position, but its low precision, the accuracy of the multipath information that obtains is lower.And the as a result precision that the mode that adopts multipath tracking obtains high (can be interpolated into 1/8chip), but because timing statistics is short, be subjected to easily channel fading, the impact of interference and noise, so the multipath information accuracy that multipath tracking obtains is also lower.
In sum, multipath information determines that the multipath information accuracy that method obtains is lower in the prior art.
Summary of the invention
The embodiment of the invention provides a kind of method and device of definite multipath information, can improve preferably the accuracy of determining multipath information.
A kind of method of definite multipath information, comprise: according to the wireless signal that pass through a plurality of path transmissions of the travelling carriage that receives to the base station transmission, obtain the first footpath information aggregate and the second footpath information aggregate, wherein, described the first footpath information aggregate is the first directly set of information structure that obtains by the multipath tracking mode, the first footpath information comprises at least one first path position information, the set of the second footpath information structure that the mode that described the second footpath information aggregate is Multipath searching obtains, the second footpath information comprises at least one second path position information; For the first footpath corresponding to each the first footpath information in the first footpath information aggregate, carry out successively according to preset order: in the second footpath information aggregate, select second footpath minimum with this first footpath distance; According to the distance between the first footpath and the second footpath, determine the 3rd footpath information aggregate, wherein, described the 3rd footpath information aggregate comprises at least one first path position information and/or at least one the second path position information; With obtain the 3rd the footpath information aggregate as the multipath information output of determining.Mode by multipath tracking and Multipath searching obtains respectively the first footpath information aggregate and the second footpath information aggregate, wherein, described the first footpath information aggregate is the first directly set of information structure that obtains by the multipath tracking mode, the first footpath information comprises at least one first path position information, the set of the second footpath information structure that the mode that described the second footpath information aggregate is Multipath searching obtains, the second footpath information comprises at least one second path position information; For the first footpath corresponding to each the first footpath information in the first footpath information aggregate, carry out successively according to preset order: in the second footpath information aggregate, select second footpath minimum with this first footpath distance; According to the distance between the first footpath and the second footpath, determine the 3rd footpath information aggregate, wherein, described the 3rd footpath information aggregate comprises at least one first path position information and/or at least one the second path position information; With obtain the 3rd the footpath information aggregate as the multipath information output of determining.
A kind of device of definite multipath information, comprise: the multipath tracking module, be used for according to the wireless signal that pass through a plurality of path transmissions of the travelling carriage that receives to the base station transmission, mode by multipath tracking obtains the first footpath information aggregate, wherein said the first footpath information aggregate comprises at least one first footpath information, and the first footpath information comprises first a path position information at least; The Multipath searching module, be used for according to the wireless signal that pass through a plurality of path transmissions of the travelling carriage that receives to the base station transmission, mode by Multipath searching obtains the second footpath information aggregate, wherein said the second footpath information aggregate comprises at least one second footpath information, and the second footpath information comprises at least one second path position information; Footpath information fusion module is used for carrying out successively according to preset order for the first footpath corresponding to each the first footpath information of the first footpath information aggregate: select second footpath minimum with this first footpath distance in the second footpath information aggregate; According to the distance between the first footpath and the second footpath, determine the 3rd footpath information aggregate, wherein, described the 3rd footpath information aggregate comprises at least one first path position information and/or at least one the second path position information; And the 3rd footpath information aggregate that will obtain is as the multipath information output of determining.
Adopt technique scheme, according to the wireless signal that pass through a plurality of path transmissions of the travelling carriage that receives to the base station transmission, the first footpath information aggregate and the second footpath information aggregate that adopts multipath tracking and Multipath searching mode to obtain is optimized management, for each corresponding first footpath of the first footpath information in the first footpath information aggregate, in the second footpath information aggregate, select second footpath minimum with this first footpath distance; According to the distance between the first footpath and the second footpath, determine the 3rd footpath information aggregate, thereby obtain the multipath information output, thereby can realize preferably utilizing the advantage of Multipath searching and two kinds of different modes of multipath tracking, obtain more accurately multipath information.
Description of drawings
Fig. 1 is in the embodiment of the invention one, the method flow diagram of definite multipath information of proposition;
Fig. 2 is in the embodiment of the invention one, and the apparatus structure of definite multipath information of proposition forms schematic diagram;
Fig. 3 is in the embodiment of the invention two, the method flow diagram of definite multipath information of proposition;
Fig. 4 is in the embodiment of the invention two, the multipath tracking management method flow chart of proposition;
Fig. 5 is in the embodiment of the invention two, the Multipath searching management method flow chart of proposition;
Fig. 6 is in the embodiment of the invention two, the footpath information fusion management method flow chart of proposition.
Embodiment
During for definite multipath information of existing in the prior art, the problem that accuracy is lower, the technical scheme that the embodiment of the invention proposes here, according to the wireless signal that pass through a plurality of path transmissions of the travelling carriage that receives to the base station transmission, the first footpath information aggregate and the second footpath information aggregate that Multipath searching and multipath tracking are obtained merge management, obtain the 3rd footpath information aggregate, thereby obtain multipath information and output, improve preferably the accuracy of definite multipath information, improved the precision of location, footpath.
At length set forth to the main realization principle of embodiment of the invention technical scheme, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
Embodiment one
The embodiment of the invention one proposes a kind of method of definite multipath information here, and as shown in Figure 1, its idiographic flow is as follows:
Wherein, the mode that described the first footpath information aggregate is multipath tracking obtains, and the element that comprises in the first footpath information aggregate is at least one first footpath information, and each element comprises first a path position information at least, preferably, the first footpath information aggregate is nonempty set.
Multipath tracking is that existing footpath is followed the tracks of, and estimates accurately that further resulting each the footpath tracking results in position in footpath namely consists of the first footpath information aggregate.Wherein, in the multipath tracking process, can revise with the EOL that the method for Interference Cancellation between the footpath is measured current footpath: when two adjacent footpath distance 1 ~ 1.5chip, think that just the EOL in current footpath estimates to be subjected to the impact in adjacent footpath, and only consider the impact in the footpath be adjacent, and do not consider that other footpath is on the impact in this footpath.For example: suppose current footpath τ
1Morning in slow measurement be respectively
Also has a footpath τ during the close 1 ~ 1.5chip in its right
2, slow measured value is respectively in its morning
Current footpath τ then
1 
Value can adopt following formula 1 to revise:
Wherein,
Current footpath τ
1Revised slow road value,
Current footpath τ
1Slow road value before revising, R
pThe coefficient of raised cosine filter, τ
1The delay position in current footpath, τ
2The delay position in the adjacent footpath in current footpath, T
cThe chip-spaced time,
It is the adjacent middle road value directly of measuring.
In like manner, if when there is the footpath on the left side in current footpath, also can be right
Revise, after the correction be
At first calculate by following formula 2:
Wherein,
Right
Correction value;
Right
Correction value;
Be the middle road value in the current footpath of measurement, P is a variate-value judging whether current footpath drifts about.
If the result who calculates according to formula 2 is P＞η
1(η wherein
1A default threshold value), then current radially right avertence is moved; If P＜-η
1, then current radially left avertence is moved; If-η
1≤ P≤η
1Then current footpath is not offset.
A kind of preferably implementation, if the result who calculates according to formula 2 is P＞η
1(η wherein
1A default threshold value), then current radially right avertence can be moved 1/8chip; If P＜-η
1, then current radially left avertence can be moved 1/8chip; If-η
1≤ P≤η
1Then current footpath is not offset.
In like manner, the result who other footpath is followed the tracks of also carries out same correction.
Particularly, the embodiment that obtains path position information (being the first footpath information aggregate that the embodiment of the invention one is mentioned) by multipath tracking here is identical with the mode of multipath tracking in the prior art, repeats no more here.
Wherein, described the second footpath information aggregate obtains by the Multipath searching mode, comprises at least one second footpath information in the second footpath information aggregate, and each element comprises second a path position information at least, and preferably, the second footpath information aggregate is nonempty set.
Particularly, the signal that terminal is sent can regard that one group of sequence represents as, then do coherent accumulation and noncoherent accumulation calculating by the reference sequences of this locality storage with the sequence that the terminal that receives is sent, thereby obtain PDP, needed path position information just can be thought in the corresponding delay point of peak value in PDP position, then these are postponed in chronological order ordering, the second path position information aggregate that the result after the ordering obtains as Multipath searching.
Preferably, in the peak value searching process, the distance between each footpath that guarantee to search is at least 1 chip (chip).This is because in Rake receiver, when the signal delay in different paths surpasses the time time-delay of 1 chip, can come at the signal distinguishing of receiving terminal with different paths, the elapsed time (phase place) combines the path, can realize strengthening the purpose that receives signal.
Particularly, the embodiment that obtains path position information (being the second footpath information aggregate that the embodiment of the invention one is mentioned) by Multipath searching here is identical with the mode of Multipath searching in the prior art, repeats no more here.
Need to prove, Fig. 1 just illustrates, it is not to carry out before step 12 that the mode of step 11 by multipath tracking obtains the first footpath information aggregate, in actual application, do not have strict execution sequence between above-mentioned steps 11 and the step 12, namely also can first execution in step 12, continue again execution in step 11.
Wherein, preset order can but to be not limited to be energy value size corresponding to time sequencing or footpath that the footpath postpones.
Wherein, if the distance between the first footpath and the second footpath less than default Second Threshold, is the first footpath information corresponding to the first footpath with the second footpath information updating corresponding to the second footpath in described the second footpath information aggregate.If the distance between the first footpath and the second footpath, is not then upgraded the second footpath information corresponding to the footpath of second in the information aggregate, the second footpath greater than default Second Threshold, with the second footpath information aggregate after upgrading as the 3rd information aggregate directly that obtains.
Preferably, after above-mentioned steps 11, can also be optimized management to the first footpath information aggregate that obtains by multipath tracking, be specially:
For all elements that comprises in the first information set, carry out respectively: in the first footpath information aggregate that obtains, select adjacent two footpaths corresponding to information, the first footpath according to preset order, energy value corresponding to the time delay difference in adjacent two footpaths of then determining to select and two footpaths, according to two time delay difference and energy values through correspondence, determine whether and to proofread and correct the position in adjacent two footpaths.
Wherein, according to described time delay difference and energy value, determine whether and need to proofread and correct the position in adjacent two footpaths, comprising:
If the time delay difference in adjacent two footpaths more than or equal to default the first threshold value, then can not proofreaied and correct the position in adjacent two footpaths; If the time delay difference in adjacent two footpaths equals default the second threshold value, then can proofread and correct the little path position of energy value in adjacent two footpaths; If the time delay difference in adjacent two footpaths equals default the 3rd threshold value, then can proofread and correct the position in adjacent two footpaths; If the time delay difference in adjacent two footpaths less than or equal to default the 4th threshold value, then can be deleted at little footpath the energy value in adjacent two footpaths.
Preferably, after above-mentioned steps 12, can also be optimized management to the second footpath information aggregate that obtains by Multipath searching, be specially: according to pre-set criteria the element in the second footpath information aggregate that obtains be divided into groups, obtain at least one second footpath information block; For the quantity of the element that comprises greater than each second footpath information block of 1, in this second footpath information block, select the most powerful path corresponding to footpath information of energy value maximum, when determining described most powerful path and the footpath occurs drift about, the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct.
Particularly, can adopt following manner to determine that the footpath drift occurs described most powerful path:
About described most powerful path, select the footpath of energy value maximum as time strong footpath in the adjacent footpath, determine that whether the ratio of the energy value that energy value that described most powerful path is corresponding and described strong footpath are corresponding is less than preset first threshold value, if, determine that the footpath drift occurs described most powerful path, if not, determine that the footpath drift does not occur described most powerful path.
Particularly, path position to footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct, can comprise: about described most powerful path, select the footpath of energy value maximum as time strong footpath in the adjacent footpath, determine the positional information in most powerful path and time strong footpath, according to the positional information of determining, the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct.Wherein, according to the positional information of determining, path position to footpath corresponding to this footpath information of the second footpath in information block is proofreaied and correct, and comprising: if most powerful path on the left side in inferior strong footpath, then the position in the footpath that the whole footpaths information in this first footpath information block is corresponding is offset default the first numerical value left; And if most powerful path is on the right in inferior strong footpath, then the position in the footpath that the whole footpaths information in this second footpath information block is corresponding is offset default the first numerical value to the right.
Correspondingly, the embodiment of the invention one also proposes a kind of device of definite multipath information here, as shown in Figure 2, comprising:
Multipath tracking module 201, be used for according to the wireless signal that pass through a plurality of path transmissions of the travelling carriage that receives to the base station transmission, mode by multipath tracking obtains the first footpath information aggregate, wherein said the first footpath information aggregate comprises at least one first footpath information, and the first footpath information comprises at least one first path position information.
Multipath searching module 202, be used for according to the wireless signal that pass through a plurality of path transmissions of the travelling carriage that receives to the base station transmission, mode by Multipath searching obtains the second footpath information aggregate, wherein said the second footpath information aggregate comprises at least one second footpath information, and the second footpath information comprises at least one second path position information.
Footpath information fusion module 203 is used for carrying out successively according to preset order for the first footpath corresponding to each the first footpath information of the first footpath information aggregate: select second footpath minimum with this first footpath distance in the second footpath information aggregate; According to the distance between the first footpath and the second footpath, determine the 3rd footpath information aggregate, wherein, described the 3rd footpath information aggregate comprises at least one first path position information and/or at least one the second path position information; And the 3rd footpath information aggregate that will obtain is as the multipath information output of determining.
Particularly, above-mentioned footpath information fusion module 203 if specifically be used for distance between the first footpath and the second footpath less than default Second Threshold, is the first information directly corresponding to the first footpath with the second footpath information updating corresponding to the second footpath in described the second footpath information aggregate; If the distance between the first footpath and the second footpath, is not then upgraded the second footpath information corresponding to the second footpath in the second footpath information aggregate greater than default Second Threshold; The second footpath information aggregate after upgrading is ceased set as the 3rd letter footpath that obtains.
Wherein said apparatus also comprises:
Multipath tracking administration module 204 is used for all elements that set comprises for the first information, carries out respectively: select adjacent two footpaths corresponding to information, the first footpath according to preset order in the first footpath information aggregate that obtains; Energy value corresponding to the time delay difference in adjacent two footpaths of determining to select and two footpaths; According to described time delay difference and energy value, determine whether and to proofread and correct the position in adjacent two footpaths.
Particularly, above-mentioned multipath tracking administration module 204 is not if the time delay difference that specifically is used for adjacent two footpaths more than or equal to default the first threshold value, is then proofreaied and correct the position in adjacent two footpaths; If the time delay difference in adjacent two footpaths equals default the second threshold value, then the little path position of energy value in adjacent two footpaths is proofreaied and correct; If the time delay difference in adjacent two footpaths equals default the 3rd threshold value, then the position in adjacent two footpaths is proofreaied and correct; If the time delay difference in adjacent two footpaths is less than or equal to default the 4th threshold value, then delete in the footpath that the energy value in adjacent two footpaths is little.
Wherein, said apparatus can also comprise Multipath searching administration module 205, is used for dividing into groups according to the element of preset order to the second footpath information aggregate of obtaining, obtains at least one second footpath information block; For the quantity of the element that comprises greater than each second footpath information block of 1, in this second footpath information block, select the most powerful path corresponding to footpath information of energy value maximum, when determining described most powerful path and the footpath occurs drift about, the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct.
Particularly, above-mentioned Multipath searching administration module 205, concrete being used for adopts following manner to determine that directly drift occurs described most powerful path: the footpath conduct time strong footpath of energy value maximum is selected in adjacent footpath about described most powerful path; Determine that whether the ratio of the energy value that energy value that described most powerful path is corresponding and described strong footpath are corresponding is less than preset first threshold value; If so, determine that the footpath drift occurs described most powerful path; If not, determine that the footpath drift does not occur described most powerful path.
Particularly, above-mentioned Multipath searching administration module 205, the concrete footpath of adjacent footpath selection energy value maximum about described most powerful path that is used for is as time strong footpath; Determine the positional information in most powerful path and time strong footpath; According to the positional information of determining, the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct.
Particularly, above-mentioned Multipath searching administration module 205, if specifically be used for most powerful path on the left side in inferior strong footpath, then the position in the footpath that the whole footpaths information in this second footpath information block is corresponding is offset default the first numerical value left; And if most powerful path is on the right in inferior strong footpath, then the position in the footpath that the whole footpaths information in this second footpath information block is corresponding is offset default the first numerical value to the right.
Correspondingly, the embodiment of the invention also proposes a kind of Rake receiver here, and this Rake receiver comprises the device of above-mentioned definite multipath information.
Should be appreciated that the only logical partitioning for carrying out according to the function of this device realization of module that above device comprises, in the practical application, can carry out stack or the fractionation of above-mentioned module.And the function that the device that this embodiment provides is realized is corresponding one by one with the method flow of definite multipath information that said method embodiment provides, the more detailed handling process that realizes for this device, in said method embodiment, be described in detail, be not described in detail herein.
Embodiment two
Further, on the basis of above-described embodiment one, based on the structure drawing of device of definite multipath information shown in Figure 2, the embodiment of the invention two is lifted an example here and is elaborated the method for determining multipath information, as shown in Figure 3
Wherein, the mode of employing multipath tracking obtains the embodiment of the first footpath information aggregate, sees also elaborating in the step 11 in above-described embodiment one, repeats no more here.
Step 32, according to the wireless signal that passes through a plurality of path transmissions that the travelling carriage that receives sends to the base station, the multipath tracking administration module is optimized management to the first footpath information aggregate that obtains by multipath tracking.
Wherein, as shown in Figure 4, the method that the first footpath information aggregate that obtains by multipath tracking is optimized management is as follows:
The first footpath information aggregate that step 401, input multipath tracking module obtain.
Step 402 for all elements that the first footpath that obtains comprises in the information aggregate, according to preset order, is selected adjacent two footpaths corresponding to information, the first footpath in the first footpath information aggregate that obtains, namely select two adjacent footpaths behind the multipath tracking.Preferably, preset order can but to be not limited to be to select two adjacent footpaths according to time sequencing, also can be according to two adjacent footpaths of energy selective sequential.
Wherein, above-mentioned energy value can be worth to replace with the middle road in estimating late in morning.
Step 404, if adjacent two the footpath the time delay difference more than or equal to default the first threshold value, then execution in step 408.
Preferably, can the first threshold value be set to 1chip.
Step 405, if the time delay difference in adjacent two footpaths equals default the second threshold value, then execution in step 409.
Preferably, can the second threshold value be set to 7/8chip.
Preferably, can the 3rd threshold value be set to 6/8chip.
Step 407, if adjacent two the footpath the time delay difference less than or equal to default the 4th threshold value, then execution in step 411.
Preferably, can the 4th threshold value be set to 5/8chip.
Step 408 can not proofreaied and correct the position in adjacent two footpaths, and outputed to step 412.
Step 409 can be proofreaied and correct the little path position of energy value in adjacent two footpaths, and be outputed to step 412.
Preferably, weak footpath can be moved, away from strong footpath 1/8chip.
Step 410 can be proofreaied and correct the position in adjacent two footpaths, and be outputed to step 412.
Preferably, can strong footpath and weak footpath is all mobile, away from the other side 1/8chip.
Step 411 then can be deleted at little footpath the energy value in adjacent two footpaths, and be outputed to step 412.
Step 412 is upgraded accordingly to the delay position in two current footpaths.
Step 413 judges whether also exist in the first footpath information aggregate not through relatively judging adjacent two footpaths of processing, if exist, then return execution in step 402, otherwise, execution in step 414.
Step 414 is with final corrected multipath tracking result output.
A kind of preferably implementation, in the above-mentioned steps 404 ~ step 411, if the time delay difference data mark in adjacent two footpaths, if data then 〉=1chip, can be adjacent two directly positions be proofreaied and correct.If data=7/8chip can move weak footpath, away from strong footpath 1/8chip.If data=6/8chip can all move strong footpath and weak footpath, away to 1/8chip.If data＜=5/8chip then can delete at little footpath the energy value in adjacent two footpaths.
Because the precision of the footpath information that obtains of multipath tracking high (can be interpolated into 1/8chip), when two footpath close proximity, the results that follow the tracks of in two footpaths can merge on the footpath.If interference cancellation method between simple employing footpath, this kind method is when offsetting other footpath to the interference in this footpath, suppose that other directly is not to be offset, and the footpath of this kind method skew judgment condition reckons without the impact of noise, be one inclined to one side estimated value is arranged, in specific implementation process, two footpaths also might occur and trace into phenomenon on the same footpath.If after carrying out the multipath tracking processing, adopt by the method for strong footpath control time strong path position to come the result of multipath tracking is optimized, path position need to not change by force.But in the practical communication environment, the possibility of result that follow the tracks of in strong footpath and inferior strong footpath is all incorrect, all needs to adjust by certain criterion.In adjustment be, can whether be lower than by the energy of measuring current footpath a certain threshold value of most powerful path energy in the same tracking cycle, thereby judge whether losing lock of this footpath, this kind method is subjected to channel fading and noise effect larger, so unstable, and can not eliminate the phenomenon that many footpaths trace into the same footpath.In the multipath tracking administration module that the embodiment of the invention proposes here, considered the problem in fat footpath, provided the method for adjusting path position according to path position and energy size.Thereby improved preferably multipath tracking result's accuracy.
Step 33, according to the wireless signal that pass through a plurality of path transmissions of the travelling carriage that receives to the base station transmission, the Multipath searching module obtains the second footpath information aggregate according to the mode of footpath delay profile by Multipath searching, and the second footpath information aggregate that will obtain sends to the Multipath searching administration module.
Wherein, the mode of employing Multipath searching obtains the embodiment of the second footpath information aggregate, sees also elaborating in the step 12 in above-described embodiment one, repeats no more here.
Wherein, as shown in Figure 5, the method that the second footpath information aggregate that obtains by Multipath searching is optimized management is as follows:
The second footpath information aggregate that step 501, input Multipath searching module obtain.
Step 502 is divided into groups to the element in the second footpath information aggregate, obtains at least one second footpath information block.
Wherein, the criterion of grouping can be: in footpath corresponding to the footpath information that comprises in the information aggregate in the second footpath, if the distance in adjacent two footpaths equals 1chip, then this two footpath is classified as one group, otherwise, a newly-built group, the like, remaining is directly divided into groups.For example, suppose one to have the element that 5 Multipath searchings obtain in the second footpath information aggregate, respectively A1 ~ A5, then relatively whether the distance between footpath A1 and the footpath A2 equals 1chip, suppose to equal 1chip, footpath A1 is classified as the second footpath information block with footpath A2, relatively whether the distance between footpath A2 and the footpath A3 equals 1chip again, supposes to equal 1chip, then A3 is included in the second footpath information block, at this moment, in the second footpath information block three elements being arranged, is respectively footpath A1 ~ A3, next, relatively whether the distance between footpath A3 and the footpath A4 equals 1chip, supposing greater than 1chip, then is newly-built one the second footpath information block of footpath A4, more then relatively the distance between footpath A4 and the footpath A5 whether equal 1chip, its manner of comparison is identical with footpath A1 ~ A4 with packet mode, repeats no more here.
Step 505 after the most powerful path, selects the footpath of energy value maximum as time strong footpath about most powerful path in selecting this second footpath information block in the adjacent footpath, establishing its energy is to be E2.
For example, suppose to comprise 5 elements in the second footpath information block, respectively footpath A1 ~ A5, suppose that the most powerful path of selecting is A4, adjacent footpath, its left and right sides is assumed to be footpath A3 and footpath A5, relatively footpath A3 and the directly energy value of A5 select the large footpath A3(of energy value to suppose that the energy value of footpath A3 is greater than the energy value of footpath A5 at this moment) as inferior directly strong.
Wherein, in the step 505, only be described in detail as example greater than the second footpath information block of 1 take the quantity of an element that comprises, carry out identical processing for other number of elements that comprise greater than the second footpath information block of 1, repeat no more here.
Step 506 according to the most powerful path of selecting and time strong footpath, judges whether the most powerful path in this second footpath information block the footpath drift occurs.If judged result is yes, execution in step 507, otherwise execution in step 508.
Wherein, whether ratio that can be by determining the energy value that energy value that the described most powerful path of selecting is corresponding and described strong footpath are corresponding judges whether most powerful path footpath drift occur less than preset first threshold value.If less than, determine that then the footpath drift occurs most powerful path, in other situations, determine that the footpath drift does not occur most powerful path.
For example, the embodiment of the invention supposes that here first threshold is Q, if E1/E2＜Q then, determine that then directly drift has occured most powerful path, need to revise execution in step 507, if E1/E2 〉=Q, determine that then footpath drift, execution in step 510 do not occur the most powerful path in this second footpath information block.
The footpath drift occurs if determine most powerful path in step 507, then the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct.If most powerful path is on the left side in inferior strong footpath, execution in step 508, if most powerful path on the right in inferior strong footpath, execution in step 509.
Wherein, about described most powerful path, select the footpath of energy value maximum as time strong footpath in the adjacent footpath, determine the positional information in most powerful path and time strong footpath, according to the positional information of determining, the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct.
A kind of preferably implementation, in the above-mentioned steps 508 ~ step 509, default the first numerical value can value be 1/2chip, and even most powerful path is on the left side in inferior strong footpath, and then the position in the footpath that the whole footpaths information in this second footpath information block is corresponding is offset 1/2chip left.If most powerful path is on the right in inferior strong footpath, then the position in the footpath that the whole footpaths information in this second footpath information block is corresponding is offset 1/2chip to the right.
Step 510 is with at every turn to the footpath information output after processing in each second footpath information block.
Step 511 judges whether also to exist the second footpath information block of not processing, if exist, then returns execution in step 503, if there is no, namely whole the second footpath information block all processing finish, then the management of multi-path searching results finished.
Wherein, in the Multipath searching module, it often is that 2 times of mistakes are adopted that the mistake of Multipath searching is adopted multiple, when two footpaths during close proximity, (peak value of namely selecting in retarding power is certain position, centre in two footpaths fat footpath phenomenon can to occur, rather than the true path position in two footpaths), if fat footpath is not processed, then the possibility of result of Multipath searching has the 1/2chip deviation with real path position maximum.Owing to considered the impact in fat footpath, and consider that the skew of strong footpath not only impacts its location, adjacent footpath, and to other the footpath location also exert an influence, based on this, the technical scheme that the embodiment of the invention proposes here, the first footpath information aggregate that Multipath searching is obtained is optimized management, and first diameter divides into groups, and then the footpath in organizing is carried out the method in the fat footpath of processing of integral translation.The result that Multipath searching is obtained who adopts the embodiment of the invention to propose here is optimized management, so that the result of location, footpath is more accurate.
Wherein, footpath information fusion module is carried out according to preset order successively for the first footpath corresponding to each the first footpath information in the first footpath information aggregate: select second footpath minimum with this first footpath distance in the second footpath information aggregate; According to the distance between the first footpath and the second footpath, determine the 3rd footpath information aggregate, wherein, described the 3rd footpath information aggregate comprises at least one first path position information and/or at least one the second path position information.
Particularly, as shown in Figure 6, obtain the 3rd footpath processing procedure of information aggregate such as following:
Need to prove that what Fig. 6 provided is a kind of better execution mode, does not have absolute timing between step 601 and the step 602, in the implementation, also can obtain first the second footpath information aggregate.
Step 603 is according to a certain order { A
iThe middle i bar footpath P that selects
iProcess, this order can but to be not limited to be the time sequencing that postpones according to the footpath, also can be the order by the energy size.
Step 604 is at { B
jThe middle selection and footpath P
iThe footpath P that distance is minimum
j, then calculate this two the footpath between apart from deta1.
Wherein, at search P '
jThe time, can pass through P
iAt { A
iIn position relationship, at { B
jIn the relevant position near begin P '
jSearch for.
Step 606 is used P
iReplace { B
jIn P '
j
If step 607 is deta〉1/4chip, judge at { A
iIn whether exist also and to participate in footpath relatively, if exist, then return execution in step 603; If there is no, then footpath use processing process finishes.
The footpath information that obtains by the management to multipath tracking and multipath merges, the effect to multipath tracking management monitoring is not only played in the multipath tracking management, and the in addition effect in the new footpath of monitoring, simultaneously, the multipath tracking administration module also can provide high-precision footpath information to the multipath tracking administration module, thereby can improve preferably the accuracy of determining footpath information.
The technical scheme that adopts the embodiment of the invention to propose here be optimized by the footpath information aggregate that multipath tracking and multipath tracking are obtained, thereby the footpath information output that will finally obtain can improve the accuracy of determining footpath information preferably.
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 (18)
1. the method for definite multipath information is characterized in that, comprising:
According to the wireless signal that pass through a plurality of path transmissions of the travelling carriage that receives to the base station transmission, obtain the first footpath information aggregate and the second footpath information aggregate, wherein, described the first footpath information aggregate is the first directly set of information structure that obtains by the multipath tracking mode, the first footpath information comprises at least one first path position information, the set of the second footpath information structure that the mode that described the second footpath information aggregate is Multipath searching obtains, the second footpath information comprises at least one second path position information;
For the first footpath corresponding to each the first footpath information in the first footpath information aggregate, carry out successively according to preset order: in the second footpath information aggregate, select second footpath minimum with this first footpath distance; According to the distance between the first footpath and the second footpath, determine the 3rd footpath information aggregate, wherein, described the 3rd footpath information aggregate comprises at least one first path position information and/or at least one the second path position information;
With obtain the 3rd the footpath information aggregate as the multipath information output of determining.
2. the method for claim 1 is characterized in that, after obtaining the first footpath information aggregate, also comprises:
For all elements that comprises in the first information set, carry out respectively: in the first footpath information aggregate that obtains, select adjacent two footpaths corresponding to information, the first footpath according to preset order;
Energy value corresponding to the time delay difference in adjacent two footpaths of determining to select and two footpaths;
According to described time delay difference and energy value, determine whether and to proofread and correct the position in adjacent two footpaths.
3. method as claimed in claim 2 is characterized in that, according to described time delay difference and energy value, determines whether and need to proofread and correct the position in adjacent two footpaths, comprising:
If the time delay difference in adjacent two footpaths more than or equal to default the first threshold value, is not then proofreaied and correct the position in adjacent two footpaths;
If the time delay difference in adjacent two footpaths equals default the second threshold value, then the little path position of energy value in adjacent two footpaths is proofreaied and correct;
If the time delay difference in adjacent two footpaths equals default the 3rd threshold value, then the position in adjacent two footpaths is proofreaied and correct;
If the time delay difference in adjacent two footpaths is less than or equal to default the 4th threshold value, then delete in the footpath that the energy value in adjacent two footpaths is little.
4. such as the arbitrary described method of claim 1 ~ 3, it is characterized in that, after obtaining the second footpath information aggregate, also comprise:
According to pre-set criteria the element in the second footpath information aggregate that obtains is divided into groups, obtain at least one second footpath information block;
For the quantity of the element that comprises greater than each second footpath information block of 1, in this second footpath information block, select the most powerful path corresponding to footpath information of energy value maximum, when determining described most powerful path and the footpath occurs drift about, the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct.
5. method as claimed in claim 4 is characterized in that, adopts following manner to determine that the footpath drift occurs described most powerful path:
About described most powerful path, select the footpath of energy value maximum as time strong footpath in the adjacent footpath;
Determine that whether the ratio of the energy value that energy value that described most powerful path is corresponding and described strong footpath are corresponding is less than preset first threshold value;
If so, determine that described most powerful path sends out into footpath drift;
If not, determine that the footpath drift does not occur described most powerful path.
6. method as claimed in claim 4 is characterized in that, the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct, and comprising:
About described most powerful path, select the footpath of energy value maximum as time strong footpath in the adjacent footpath;
Determine the positional information in most powerful path and time strong footpath;
According to the positional information of determining, the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct.
7. method as claimed in claim 6 is characterized in that, according to the positional information of determining, the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct, and comprising:
If most powerful path is on the left side in inferior strong footpath, then the position in the footpath that the whole footpaths information in this second footpath information block is corresponding is offset default the first numerical value left; And
If most powerful path is on the right in inferior strong footpath, then the position in the footpath that the whole footpaths information in this second footpath information block is corresponding is offset default the first numerical value to the right.
8. the method for claim 1 is characterized in that, according to the distance between the first footpath and the second footpath, determines the 3rd footpath information aggregate, comprising:
If the distance between the first footpath and the second footpath less than default Second Threshold, is the first footpath information corresponding to the first footpath with the second footpath information updating corresponding to the second footpath in described the second footpath information aggregate;
If the distance between the first footpath and the second footpath, is not then upgraded the second footpath information corresponding to the second footpath in the second footpath information aggregate greater than default Second Threshold;
With the footpath of second after upgrading information aggregate as the 3rd information aggregate directly that obtains.
9. method as claimed in claim 2 is characterized in that, described preset order comprises:
The time sequencing that the footpath postpones; Perhaps
The energy value size that the footpath is corresponding.
10. the device of definite multipath information is characterized in that, comprising:
The multipath tracking module, be used for according to the wireless signal that pass through a plurality of path transmissions of the travelling carriage that receives to the base station transmission, mode by multipath tracking obtains the first footpath information aggregate, wherein said the first footpath information aggregate comprises at least one first footpath information, and the first footpath information comprises first a path position information at least;
The Multipath searching module, be used for according to the wireless signal that pass through a plurality of path transmissions of the travelling carriage that receives to the base station transmission, mode by Multipath searching obtains the second footpath information aggregate, wherein said the second footpath information aggregate comprises at least one second footpath information, and the second footpath information comprises at least one second path position information;
Footpath information fusion module is used for carrying out successively according to preset order for the first footpath corresponding to each the first footpath information of the first footpath information aggregate: select second footpath minimum with this first footpath distance in the second footpath information aggregate; According to the distance between the first footpath and the second footpath, determine the 3rd footpath information aggregate, wherein, described the 3rd footpath information aggregate comprises at least one first path position information and/or at least one the second path position information; And the 3rd footpath information aggregate that will obtain is as the multipath information output of determining.
11. device as claimed in claim 10 is characterized in that, also comprises:
The multipath tracking administration module is used for all elements that set comprises for the first information, carries out respectively: select adjacent two footpaths corresponding to information, the first footpath according to preset order in the first footpath information aggregate that obtains; Energy value corresponding to the time delay difference in adjacent two footpaths of determining to select and two footpaths; According to described time delay difference and energy value, determine whether and to proofread and correct the position in adjacent two footpaths.
12. device as claimed in claim 11 is characterized in that, described multipath tracking administration module is not if the time delay difference that specifically is used for adjacent two footpaths more than or equal to default the first threshold value, is then proofreaied and correct the position in adjacent two footpaths; If the time delay difference in adjacent two footpaths equals default the second threshold value, then the little path position of energy value in adjacent two footpaths is proofreaied and correct; If the time delay difference in adjacent two footpaths equals default the 3rd threshold value, then the position in adjacent two footpaths is proofreaied and correct; If the time delay difference in adjacent two footpaths is less than or equal to default the 4th threshold value, then delete in the footpath that the energy value in adjacent two footpaths is little.
13. such as the arbitrary described device of claim 10 ~ 12, it is characterized in that, also comprise:
The Multipath searching administration module is used for dividing into groups according to the element of preset order to the second footpath information aggregate of obtaining, obtains at least one second footpath information block; For the quantity of the element that comprises greater than each second footpath information block of 1, in this second footpath information block, select the most powerful path corresponding to footpath information of energy value maximum, when determining described most powerful path and the footpath occurs drift about, the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct.
14. device as claimed in claim 13 is characterized in that, described Multipath searching administration module, and concrete being used for adopts following manner to determine that directly drift occurs described most powerful path: the footpath conduct time strong footpath of energy value maximum is selected in adjacent footpath about described most powerful path; Determine that whether the ratio of the energy value that energy value that described most powerful path is corresponding and described strong footpath are corresponding is less than preset first threshold value; If so, determine that the footpath drift occurs described most powerful path; If not, determine that the footpath drift does not occur described most powerful path.
15. device as claimed in claim 13 is characterized in that, described Multipath searching administration module, and the concrete footpath of adjacent footpath selection energy value maximum about described most powerful path that is used for is as time strong footpath; Determine the positional information in most powerful path and time strong footpath; According to the positional information of determining, the path position in footpath corresponding to the footpath information in this second footpath information block is proofreaied and correct.
16. device as claimed in claim 15 is characterized in that, described Multipath searching administration module, if specifically be used for most powerful path on the left side in inferior strong footpath, then the position in the footpath that the whole footpaths information in this second footpath information block is corresponding is offset default the first numerical value left; And if most powerful path is on the right in inferior strong footpath, then the position in the footpath that the whole footpaths information in this second footpath information block is corresponding is offset default the first numerical value to the right.
17. device as claimed in claim 10, it is characterized in that, described footpath information fusion module, if concrete be used for distance between the first footpath and the second footpath less than default Second Threshold, be the first information directly corresponding to the first footpath with the second footpath information updating corresponding to the second footpath in described the second footpath information aggregate; If the distance between the first footpath and the second footpath, is not then upgraded the second footpath information corresponding to the second footpath in the second footpath information aggregate greater than default Second Threshold; With the footpath of second after upgrading information aggregate as the 3rd information aggregate directly that obtains.
18. a Rake receiver is characterized in that, comprises the device such as the arbitrary described definite multipath information of claim 10 ~ 17.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595443A (en) * | 2013-11-15 | 2014-02-19 | 京信通信系统（中国）有限公司 | Multi-path searching method and system of WCDMA system |
| CN107889211A (en) * | 2016-09-30 | 2018-04-06 | 北京信威通信技术股份有限公司 | A kind of method and device of positioning |
| CN108318864A (en) * | 2018-02-06 | 2018-07-24 | 成都纳雷科技有限公司 | A kind of method and device for eliminating multipath target in Radar Targets'Detection |
| CN111446983A (en) * | 2019-01-16 | 2020-07-24 | 北京小米松果电子有限公司 | Multipath searcher, cell search device and cell search method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1372269A1 (en) * | 2002-06-12 | 2003-12-17 | Agilent Technologies, Inc. - a Delaware corporation - | Improved spread spectrum receiver rake |
| CN1492610A (en) * | 2002-10-24 | 2004-04-28 | 华为技术有限公司 | Multipath searching method and device in CDMA system |
| CN1501609A (en) * | 2002-11-15 | 2004-06-02 | 华为技术有限公司 | A Multipath tracing method and apparatus for CDMA communication system |
| CN1574688A (en) * | 2003-06-10 | 2005-02-02 | 三星电子株式会社 | Rake receiving apparatus and method in a direct sequence CDMA mobile communication system |
| CN101022287A (en) * | 2007-04-09 | 2007-08-22 | 互芯集成电路（北京）有限公司 | Multi-path detecting method and receiver in code division multiple access communication system |
| CN101123462A (en) * | 2007-08-30 | 2008-02-13 | 中兴通讯股份有限公司 | A multi-path search value interposition method for direct frequency spreading code division multi-address system |
| CN101267228A (en) * | 2008-04-23 | 2008-09-17 | 北京北方烽火科技有限公司 | A multi-path search and tracking method in WCDMA base station receiver based on DSP |
| CN102142860A (en) * | 2010-01-29 | 2011-08-03 | 上海摩波彼克半导体有限公司 | System and method for multi-path combining control of RAKE receiver in third-generation mobile communication system |
-
2012
- 2012-09-25 CN CN201210361751.7A patent/CN102904605B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1372269A1 (en) * | 2002-06-12 | 2003-12-17 | Agilent Technologies, Inc. - a Delaware corporation - | Improved spread spectrum receiver rake |
| CN1492610A (en) * | 2002-10-24 | 2004-04-28 | 华为技术有限公司 | Multipath searching method and device in CDMA system |
| CN1501609A (en) * | 2002-11-15 | 2004-06-02 | 华为技术有限公司 | A Multipath tracing method and apparatus for CDMA communication system |
| CN1574688A (en) * | 2003-06-10 | 2005-02-02 | 三星电子株式会社 | Rake receiving apparatus and method in a direct sequence CDMA mobile communication system |
| CN101022287A (en) * | 2007-04-09 | 2007-08-22 | 互芯集成电路（北京）有限公司 | Multi-path detecting method and receiver in code division multiple access communication system |
| CN101123462A (en) * | 2007-08-30 | 2008-02-13 | 中兴通讯股份有限公司 | A multi-path search value interposition method for direct frequency spreading code division multi-address system |
| CN101267228A (en) * | 2008-04-23 | 2008-09-17 | 北京北方烽火科技有限公司 | A multi-path search and tracking method in WCDMA base station receiver based on DSP |
| CN102142860A (en) * | 2010-01-29 | 2011-08-03 | 上海摩波彼克半导体有限公司 | System and method for multi-path combining control of RAKE receiver in third-generation mobile communication system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595443A (en) * | 2013-11-15 | 2014-02-19 | 京信通信系统（中国）有限公司 | Multi-path searching method and system of WCDMA system |
| CN103595443B (en) * | 2013-11-15 | 2016-02-10 | 京信通信系统（中国）有限公司 | The multipath searching method of WCDMA system and system |
| CN107889211A (en) * | 2016-09-30 | 2018-04-06 | 北京信威通信技术股份有限公司 | A kind of method and device of positioning |
| CN107889211B (en) * | 2016-09-30 | 2020-06-16 | 北京信威通信技术股份有限公司 | Positioning method and device |
| CN108318864A (en) * | 2018-02-06 | 2018-07-24 | 成都纳雷科技有限公司 | A kind of method and device for eliminating multipath target in Radar Targets'Detection |
| CN111446983A (en) * | 2019-01-16 | 2020-07-24 | 北京小米松果电子有限公司 | Multipath searcher, cell search device and cell search method |
| CN111446983B (en) * | 2019-01-16 | 2022-02-15 | 北京小米松果电子有限公司 | Multipath searcher, cell search device and cell search method |
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