CN103516391A - Multipath detection method and apparatus - Google Patents
Multipath detection method and apparatus Download PDFInfo
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- CN103516391A CN103516391A CN201210197752.2A CN201210197752A CN103516391A CN 103516391 A CN103516391 A CN 103516391A CN 201210197752 A CN201210197752 A CN 201210197752A CN 103516391 A CN103516391 A CN 103516391A
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Abstract
The invention discloses a multipath detection method and an apparatus. The method comprises the following steps: a multipath search task is received, wherein the multipath search task contains indicator information of hardware resources which are allowed at time quantum of different lengths; hardware resources are allocated for the multipath search task; and multipath detection is carried out on the multipath search task according to the allocated hardware resources. By the method, the technical problem that hardware resources for multipath search cannot be effectively controlled in the prior art is solved, and time division multiplexing of hardware resources is realized. Thus, utilization rate of hardware resources in multipath detection is raised.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of multi-path detecting method and device.
Background technology
In wireless communication system, because the communication environments of signal is different, inevitably can there is multipath interference problem.For code division multiple access (Code Division Multiple Access, referred to as CDMA) system, the orthogonal varying-length expanding frequency code of employing (OVSF) has good auto-correlation and their cross correlation.According to this character, when the propagation delay of two-way same signal surpasses a chip, multipath signal can be counted as same signal and at different time, repeat the result of transmission, so multipath signal is easy to be detected.
Meanwhile, owing to containing utilizable information in multipath signal, cdma receiver can improve the signal to noise ratio that receives signal by merging these multipath signals.RAKE receiver is to utilize the advanced reception technique of this theoretical foundation, its operation principle is by a plurality of correlation detector receiving multipath signals Zhong Ge road signals (finger), then by certain algorithm, they are combined, give follow-up processing unit and adjudicate and decoding.
Wideband Code Division Multiple Access (WCDMA) (Wideband-Code Division Multiple Access, referred to as WCDMA) be one of mainstream standard of 3G, the feature with cdma system, adopt the carrier frequency of 3.84MHZ, guaranteed that system chip is a very little time interval, its multipath signal is to be easy to detect by Rake receiver.So WCDMA adopts RAKE receiver to disturb, improve the important technical of communication quality as opposing multipath.For RAKE receiver, if simply the result of channel estimating is distributed to the tap of receiver, some tap assignments may be the estimated value of pure noise, so conventionally adopt Multipath searching identification multi-path location, thereby reduce the possibility of this assignment error, improve the performance of receiver.
The uplink receiving scheme of WCDMA system as shown in Figure 1, the UE information that the leading search of multipath management and utilization obtains is initiated Multipath searching, Multipath searching is correlated with cumulative within the window scope of multipath management appointment to the signal of designated user, obtain the ADP value of the different delay positions of this user, then according to a certain algorithm, from these ADP values, select candidate's multipath of some.Multipath management is again according to these candidate's multipaths and select several Finger in conjunction with historical information and send into Rake receiver and process.So, the front end that Multipath searching should be in Rake receiver, it directly has influence on the performance of Rake receiver to the speed of Channel Processing and accuracy.For multipath, mainly contain three basic demands: 1) search speed is fast; 2) antijamming capability is strong; 3) simple in structure, be easy to realize.
In WCDMA system, uplink receiver is mainly that Dedicated Physical Control Channel (E-) DPCCH is carried out to Multipath searching, according to pilot tone or control signal in (E-) DPCCH, estimates multidiameter delay.
The frame structure of (E-) DPCCH channel as shown in Figure 2, the value of frequency pilot sign under the different numbers of different time-gap is different, and concrete distribution is determined by agreement.As shown in Figure 3, (E-) Multipath searching of DPCCH is exactly that the signal in a symbol, it being received is correlated with cumulative, then according to coherence length (symbol numbers) and incoherent length, carry out the cumulative of respective length, finally select several multipaths as Candidate Set.
At present, Multipath searching implementation structure needs a large amount of memory spaces to carry out necessary coherent algorithm, no matter adopt the implementation structure of full software or devices at full hardware simultaneously, its processing speed, complexity, flexibility ratio, upgradability all can be subject to corresponding impact, thereby cause the increase of base station cost and power consumption.
For above-mentioned problem, effective solution is not yet proposed at present.
Summary of the invention
The invention provides a kind of multi-path detecting method and device, at least to solve the technical problem that cannot control effectively to the hardware resource of Multipath searching in prior art.
According to an aspect of the present invention, provide a kind of multi-path detecting method, having comprised: receive Multipath searching task, wherein, Multipath searching task has comprised: Multipath searching task has allowed the indication information of the hardware resource that takies on the time period of different length; For Multipath searching task is distributed hardware resource; According to the hardware resource distributing, Multipath searching task is carried out to multipath detection.
Preferably, Multipath searching task on the time period of different length, allow the indication information of the hardware resource that takies comprise following one of at least: corresponding to Multipath searching task, at each of AP, each time slot of each AP and each symbol of each time slot allow the indication information of the hardware resource that takies cycle of activity.
Preferably, in Multipath searching task, by setting corresponding bit, indicate whether to allow to take hardware resource.
Preferably, for identifying each symbol, whether to allow to take the frequency pilot sign that the bit of hardware resource is corresponding with this symbol identical.
Preferably, for Multipath searching task, distributing hardware resource comprises: judge whether current hardware resource meets the indicated resource of indication information; If so, information is distributed to Multipath searching task by hardware resource as indicated; If not, according to current hardware resource situation, be Multipath searching task distribution hardware resource again.
Preferably, according to the hardware resource distributing, Multipath searching task being carried out to multipath detection comprises: read the antenna data corresponding to Multipath searching task, wherein, antenna data is recycled and is stored in buffer memory; According to the hardware resource distributing, the antenna data reading is carried out to multipath detection.
Preferably, in buffer memory, store the corresponding chip of antenna that is less than predetermined threshold with timing.
Preferably, said method also comprises: the storage resources of system is divided into one or more storage resources pieces, when receiving Multipath searching task, according to the resource of Multipath searching required by task, be that Multipath searching task is distributed one or more storage resources pieces, wherein, the storage resources piece of distribution is for storing the testing result of Multipath searching task being carried out to multipath detection.
According to a further aspect in the invention, a kind of multi-path detection device is provided, has comprised: receiving element, for receiving Multipath searching task, wherein, Multipath searching task comprises: Multipath searching task allows the indication information of the hardware resource that takies on the time period of different length; Allocation units, are used to Multipath searching task to distribute hardware resource; Detecting unit, for carrying out multipath detection according to the hardware resource distributing to Multipath searching task.
Preferably, allocation units comprise: judge module, for judging whether current hardware resource meets the indicated resource of indication information; The first distribution module, in the situation that judgement is, information is distributed to Multipath searching task by hardware resource as indicated; The second distribution module, in the situation that judgement is no, is Multipath searching task distribution hardware resource according to current hardware resource situation again.
In the present invention, be assigned in the Multipath searching task of hardware and pre-determined this Multipath searching task at the required hardware resource taking of different time sections, so just can be so that when this Multipath searching task take this part resource yet, these hardware resources are distributed to other task to be used, thereby solved the technical problem that cannot control effectively to the hardware resource of Multipath searching in prior art, reach the time division multiplexing to hardware resource, thereby improved the utilance of hardware resource in multipath detection.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the up functional schematic of the WCDMA of correlation technique;
Fig. 2 is according to the frame structure block diagram of (E-) DPCCH channel in the WCDMA of correlation technique;
Fig. 3 is a kind of preferred flow charts according to the multi-path detecting method of the embodiment of the present invention;
Fig. 4 is a kind of preferred structure block diagram according to the multi-path detection device of the embodiment of the present invention;
Fig. 5 is the another kind of preferred structure block diagram according to the multi-path detection device of the embodiment of the present invention;
Fig. 6 is the WCDMA Multipath searching functional schematic according to the embodiment of the present invention;
Fig. 7 is the block diagram of realizing according to the WCDMA Multipath searching of the embodiment of the present invention;
Fig. 8 is according to the realization flow figure of the WCDMA Multipath searching of the embodiment of the present invention;
Fig. 9 controls schematic diagram according to three layers of the WCDMA Multipath searching of the embodiment of the present invention;
Figure 10 is according to the task control schematic diagram of the WCDMA Multipath searching of the embodiment of the present invention;
Figure 11 is according to the antenna data access schematic diagram of the WCDMA Multipath searching of the embodiment of the present invention;
Figure 12 produces schematic diagram according to the PN code of the WCDMA Multipath searching of the embodiment of the present invention;
Figure 13 detects schematic diagram according to the multipath of the WCDMA Multipath searching of the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
The present embodiment provides a kind of multi-path detecting method, as shown in Figure 4, comprises the following steps:
Step S402: receive Multipath searching task, wherein, Multipath searching task comprises: Multipath searching task allows the indication information of the hardware resource that takies on the time period of different length;
Step S404: for Multipath searching task is distributed hardware resource;
Step S406: Multipath searching task is carried out to multipath detection according to the hardware resource distributing.
In above-mentioned preferred implementation, be assigned in the Multipath searching task of hardware and pre-determined this Multipath searching task at the required hardware resource taking of different time sections, so just can be so that when this Multipath searching task take this part resource yet, these hardware resources are distributed to other task to be used, thereby solved the technical problem that cannot control effectively to the hardware resource of Multipath searching in prior art, reach the time division multiplexing to hardware resource, thereby improved the utilance of hardware resource in multipath detection.
For example, can on software, carry out the distribution of hardware resource, at software, receive after Multipath searching instruction, hardware resource in the time of just can determining that multipath detects according to this Multipath searching instruction, preferably, also all hardware resources can be divided into a plurality of AP set, each cycle of activity (Action Period, referred to as AP) in set corresponding each time period allow the resource taking, according to the demand of Multipath searching task, be that Multipath searching task is distributed a suitable AP set, to realize this Multipath searching task taking resource, the Multipath searching task that distributes hardware resource is handed down to hardware to be carried out.
In a preferred implementation, Multipath searching task on the time period of different length, allow the indication information of the hardware resource that takies comprise following one of at least: corresponding to described Multipath searching task, at each of AP, each time slot of each AP and each symbol of described each time slot allow the indication information of the hardware resource that takies cycle of activity.That is, Multipath searching task is divided into three layers, these three layers is respectively AP layer, slotmask layer, symbolmask layer, its successively from outside to inside, the scope of control is progressively dwindled.By these three layers and these three layers of lasting times, can easy to do realization time division multiplexing operation to this resource pool, and can control task take as required time of resource pool, in some cycles, subscriber signal is carried out to selectable integration cumulative.
Can indicate each time point whether to allow to take hardware resource by binary bit, in a preferred implementation, in Multipath searching task, by setting corresponding bit, indicate each AP, each time slot or each symbol whether to allow to take hardware resource.Preferably, identifying each symbol, whether to allow to take the frequency pilot sign that the bit of hardware resource is corresponding with this symbol identical.For example: slotmask layer is illustrated in the take situation of this task to resource pool in current time slots, if this time slot in GAP, shows that user is countless according to transmission, does not take resource pool, and it is 1 that mask corresponding bits position is set; Otherwise, give 0.Symbolmask layer is illustrated in the take situation of this task to resource pool in current sign, this mask conventionally (is frequency pilot sign for DPCCH with (E-) the energy symbol pattern of DPCCH signal, can be by user's self-defining for (E-) DPCCH) consistent, if current symbol is effective, use resource pool; Otherwise other task is given in releasing resource pond.
Consider and occur that sometimes upper strata determined hardware resource, yet the hardware resource that is found to be this Multipath searching task distribution when arriving hardware is occupied or abnormal etc., just need this time is this task Resources allocation again, in a preferred implementation, for described Multipath searching task, distribute described hardware resource and comprise: judge whether current hardware resource meets the indicated resource of described indication information; If so, according to described indication information, hardware resource is distributed to described Multipath searching task; If not, according to current hardware resource situation, be that described Multipath searching task is distributed hardware resource again.
For example: the validity of task and the entry-into-force time of task in the task controller judgement Multipath searching task requests in hardware, and analyze occupation condition, and only have as after distribution of work related hardware resource, just task is pressed into operation queue carries out multipath detection.
Consider spreading factor, the search window length of (E-) DPCCH channel and process the many factors such as consuming time, only buffer memory is from 12 antenna on-time data of the nearest 640chips of current system timing, these antenna data can be stored in 32 independently in SSRAM successively, the antenna data of each SSRAM buffer memory 20chips, the antenna data of each chip is corresponding one by one with the chip time of 5 128chips of timing, 5 128chips of take are the cycle, circulation storage.Thereby reached the effective utilization to storage resources, in a preferred implementation, according to the described hardware resource distributing, described Multipath searching task being carried out to multipath detection comprises: read the antenna data corresponding to described Multipath searching task, wherein, described antenna data is recycled and is stored in buffer memory; According to the described hardware resource distributing, the antenna data reading is carried out to multipath detection.Preferably, in buffer memory, store the corresponding chip of antenna that is less than predetermined threshold with timing.
In a preferred implementation, can in advance the storage resources of system be divided into one or more storage resources pieces, when receiving described Multipath searching task, according to the resource of described Multipath searching required by task, be that described Multipath searching task is distributed one or more storage resources pieces, wherein, the storage resources piece of distribution is for storing the testing result that described Multipath searching task is carried out to multipath detection.
After carrying out multipath detection, need to carry out multipath selection, preferably, can realize according to following steps: from the storage resources corresponding to described Multipath searching task, read the result that multipath detects; The result detecting according to the multipath reading is carried out multipath selection.
A kind of multi-path detection device is also provided in the present embodiment, and this device is used for realizing above-described embodiment and preferred implementation, has carried out repeating no more of explanation.As used below, the combination of software and/or the hardware of predetermined function can be realized in term " unit " " module ".Although the described device of following examples is preferably realized with software, hardware, or the realization of the combination of software and hardware also may and be conceived.Fig. 5 is a kind of preferred structure block diagram of multi-path detection device, as shown in Figure 5, comprising: receiving element 502, allocation units 504 and detecting unit 506, describe this structure below.
Receiving element 502, for receiving Multipath searching task, wherein, described Multipath searching task comprises: described Multipath searching task allows the indication information of the hardware resource that takies on the time period of different length;
Detecting unit 506, with allocation units 504 couplings, for described Multipath searching task being carried out to multipath detection according to the described hardware resource distributing.
In a preferred implementation, as shown in Figure 6, allocation units comprise: judge module 602, for judging whether current hardware resource meets the indicated resource of described indication information; The first distribution module 604, with judge module 602 couplings, in the situation that judgement is, distributes to described Multipath searching task according to described indication information by hardware resource; The second distribution module 606, with judge module 602 couplings, in the situation that judgement is no, is that described Multipath searching task is distributed hardware resource according to current hardware resource situation again.
The invention provides a kind of preferred embodiment and come further the present invention to be made an explanation, but it should be noted that the preferred embodiment, just in order better to describe the present invention, does not form the present invention is limited improperly.
The technical program has been described a kind of WCDMA Multipath searching implementation method and device, the structured flowchart of Multipath searching as shown in Figure 7, mainly comprises: resource management, task control, antenna data access, PN code generator, multipath detect, piece management, ADP storage, ADP reports and nine major parts such as multipath selection.The present embodiment mainly lays particular emphasis on following inventive concept:
1) software administration, hardware-accelerated.
Fully the high speed of combined with hardware and the flexibility of software, make it simple in structure, easily realizes, and is beneficial to upgrading, improves the speed of Multipath searching, saves hardware resource.Consider resource management and complexity and mutability algorithm on and the alternative of multipath selection part on controlling, these two parts adopt the form of software to realize.Yet other parts all belong to data-intensive module, adopt the form of hardware to realize.By software, the operation of hardware is carried out to control and management, the data that hardware needs software are accelerated to process, and like this in conjunction with both advantages, have realized efficient Multipath searching.
2) hierarchical control, time divisional processing.
Consider that the search window length due to Multipath searching in actual items is generally 16 multiple, can adopt the thought of resource pool, the Shi Liu rank multipath that designs a set of 16 tunnels detects resource pool, each user shares this cover resource pool in time-multiplexed mode, and each takies the search window that the cycle is 16 to unique user length simultaneously and initiates search.
Meanwhile, according to the diversity of Multipath searching mission requirements and (E-) frame characteristics of DPCCH channel, for convenience of the time division multiplexing to shared resource pond, can divide three layers to task, to control.These three layers are respectively: AP layer, slotmask layer and symbolmask layer, its successively from outside to inside, the scope of control is progressively dwindled.By these three layers and these three layers of lasting times, the time division multiplexing operation to this resource pool can be effectively realized, and the time of resource pool can be control task taken as required, in some cycles, subscriber signal is carried out to selectable integration cumulative.AP layer mainly consists of duration and distance two parts.Task, during duration, need to take the part (task can carried out the calculating of ADP during this period) in resource pool; And during distance, task does not take any hardware resource pool.AP can, by system definition multiple format, form an AP set.When initiating search mission, by explorer, according to the distribution condition of current resource pool, from set, select a suitable AP to this task.By AP layer, can the circulation of resource pool be taken control task, slotmask layer is illustrated in the take situation of this task to resource pool in current time slots, if this time slot is in GAP, show that user is countless according to transmission, do not take resource pool, it is 1 that mask corresponding bits position is set; Otherwise, give 0.Symbolmask layer is illustrated in the take situation of this task to resource pool in current sign, this mask conventionally (is frequency pilot sign for DPCCH with (E-) the energy symbol pattern of DPCCH signal, can be by user's self-defining for (E-) DPCCH) consistent, if current symbol is effective, use resource pool; Otherwise other task is given in releasing resource pond.By this control of three layers, task can be used the situation of hardware resource be mapped on resource pool one by one.
3) distribution according to need storage resources.
Because the search window length of Multipath searching is the spreading factor of (E-) DPCCH channel to the maximum, 256.If the interim storage resources that carrys out static allocation task according to this, wastes a large amount of memory spaces.Reason is mainly: the search window length of each task can not be maximum, therefore can adopt time-division shared resource pond, the in the situation that of definite in the hardware clock cycle, the search window overall length of its support is also limited, generally can be significantly smaller than by the definite upper limit of search window maximum length.So, by the demand assignment storage resources according to task, can greatly save memory space.Minimum basic unit (referred to as Block) using 16 memory spaces as buffer memory in realization, gives an ID to each Block.Like this, to its essence of the management of memory, be exactly the management to these BlockID, thereby simplified design.At the beginning of task run, according to the BlockID of the length allocation respective number of search window, the line item of going forward side by side; Among task running, according to task ID and current proceeded to search window position, query note, the BlockID that finds current task current location to use, thus realize the correct access to memory; After task end of run, search record, reclaim all storage resources that current task is occupied, to improve to follow-up task, use.
4) antenna data circulation storage, parallel reading.
Consider spreading factor, the search window length of (E-) DPCCH channel and process the many factors such as consuming time, can a buffer memory from current system 12 antenna on-time data of nearest 640chips regularly, these antenna data are stored in 32 independently in SSRAM successively, the antenna data of each SSRAM buffer memory 20chips, the antenna data of each chip is corresponding one by one with the chip time of 5 128chips of timing, 5 128chips of take are the cycle, circulation storage.
Due to the multi-path detecting method on resource pool employing 16 rank, Shi 16 tunnel, each cycle is simultaneously treated is 16 search Chuan positions, and antenna data is adopted to the parallel mode that reads 32chips simultaneously.And these 32 independently antenna data need two correlations just can be finished, so need to carry out simple shifting processing in reading antenna data.
Inventive concept based on above-mentioned, divisional processing while adopting hierarchical control, software administration is hardware-accelerated, and the principle of distribution according to need storage resources, and the concept based on resource pool detects multipath at hardware components (relevant cumulative; & Xiang Ganleijia & & Noncoherent accumulation) resource time division multiplexing, organically combines resource management and multipath selection algorithm at software section, makes full use of the high speed of hardware and the flexibility of software, makes WCDMA Multipath searching more flexible, is convenient to upgrading; Adopt demand assigned strategy to distribute interim memory space simultaneously and to the antenna data mode that memory parallel reads of taking to circulate, simplified the complexity realizing, having saved hardware resource, thereby effectively reduced BTS hardware cost and power consumption.By spatial cache in the middle of a certain amount of hardware resource of time division multiplexing and distribution according to need, realize Multipath searching, save hardware resource, reduce base station cost, reduce power consumption; Simultaneously by hierarchical control hardware management resource, software and hardware combining, the complexity of simplified design, improves flexibility, is easy to realize and upgrading.
Below in conjunction with accompanying drawing, above-mentioned inventive concept is described in detail, as shown in Figure 8, comprise the following steps:
Step S802: in advance storage resources distributed by piece and reclaim, software after startup first the piece resource to hardware carry out initialization, prepare all memory block resources, then wait for the Multipath searching instruction on upper strata.
Step S804: software, after receiving Multipath searching instruction, according to the service condition of current hardware resource (correlator and memory block), adopts the mode of three layers of control decompose with encapsulation task and be handed down to hardware.
For above-mentioned steps S804, be mainly by realizing as the resource management module in Fig. 7, this module is mainly used according to the search need of multipath management, mode with task produces the request form that is applicable to various different search needs, and issuing these requests to hardware, control hardware is done Multipath searching in time-multiplexed mode.Diversity due to search mission demand, can, according to the frame characteristics of (E-) DPCCH channel, arrange three layers and control shell, respectively: AP shell, slotmask shell, symbolmask shell, these three layers of shells successively from outside to inside, progressively dwindle by the scope of control.By the duration of these three layers of shells and these three shells, can carry out effective time division multiplexing operation to sharing hardware resource, and can control task take as required the time of resource pool, in some cycles, subscriber signal is carried out to selectable integration cumulative.Control schematic diagram for three layers of a kind of WCDMA Multipath searching as shown in Figure 9, the AP in figure represents to calculate the cycle of ADP.Each AP consists of duration and distance two parts, the duration AP ON in figure namely wherein, and distance draws the part of fork in figure.System definition a set of No. AP set, resource management module, when generating each search mission according to Multipath searching demand, takies the situation of hardware resource in conjunction with allocating task, from No. AP set, select one specific No. AP to this task.During the ON or duration of AP, task need to take the part (task just can carried out the calculating of ADP during this period) in total resources pond, and during the distance of AP, task does not take the hardware resource pool of search.By ground floor, control, can realize the circulation of hardware resource is taken or discharged; Second layer control representation be the situation that takies to hardware resource in slot, if this time slot in GAP, shows that user is countless according to transmission, do not take hardware resource (as Fig. 9 draws as shown in fork divides); The 3rd layer of control representation be the situation that takies of hardware resource during symbol, conventionally consistent with frequency pilot sign pattern for DPCCH channel, and for E-DPCCH channel, its symbol pattern can, by User Defined, if symbol is effective, take hardware resource; Otherwise the hardware resource that discharges this symbol is given other task (as Fig. 9 draws as shown in fork divides).
Step S806: the task controller judgement validity of task requests and the entry-into-force time of task, analyze occupation condition, become after distribution of work related hardware resource, task is pressed into operation queue.
Above-mentioned steps S806 is mainly by realizing as the task control module in Fig. 7, this module is as the tie of software-hardware synergism, play a part to form a connecting link, be mainly used in receiving the task requests that comes from software, and by analyzing and explain these task requests, control and share the time sharing segment operation of hardware and stop, to reach the object of time division multiplexing hardware resource.Task control module realize block diagram as shown in 10.Resource management module issues request to TskReqFIFO in the mode of task, TskReqChk module judges when this FIFO is non-NULL, therefrom read current task solicited message, and do request inspection in conjunction with the historic task state information in TskStatRam, according to the result checking, upgrade TskReqRam, produce task requests response message to TskRspFIFO simultaneously, in the mode of interrupting, notify resource management module to read.TskTimChk module is according to the finish the work inspection of entry-into-force time point of the task request message in TskReqRam and the task status information in TskStatRam, and by the result feedback producing after checking to TskAnalyze module.TskAnalyze module is according to the result of TskTimChk module check, successively each being come into force according to task ID order from small to large of task is carried out the analysis of cycle occupation condition, and the middle log that reads the parameter of this task and read this task from TskParaRam from TskMiddRam, by information such as the AP in parameter and mask, judge the resources occupation situation of this task in this cycle, if need to take resource, this task is joined to TskExeFifo, and the middle log of safeguarding (describing the Counter Value of AP switching and mask) is left in TskMiddRam.
Step S808: multipath detection module reads task from operation queue, and read relevant data and obtain PN code from PN code generator from antenna data memory block and parameter region, corresponding multipath detection calculations then carried out.
Above-mentioned steps S808 mainly three parts such as the antenna data access module in Fig. 7, PN code generator module and multipath detection module forms.Antenna data access module is mainly used in buffer memory from the antenna data of antenna front-end processing module, for the correlator of this module provides associated antenna data.From abstract angle, say, can regard the function of a string conversion and antenna data restructuring as.Specifically, this module is mainly under the control of system sequence (system clock, global counter Gcc), continuously antenna data is in a planned way circulated and is deposited in local Ram, and the antenna data of each chip will connect with timing; Meanwhile, the 32chips antenna data of the every task assigned address of parallel output under the control of task control module, does subsequent treatment to offer 16 road parallel correlators.Consider spreading factor, the search window length of (E-) DPCCH channel and process the many factors such as consuming time, this module buffer memory is from 12 antenna on-time data of the nearest 640chips of current system timing, these antenna data are stored in 32 independently in SSRAM successively, the antenna data of each SSRAM buffer memory 20chips.As shown in Figure 8, the antenna data of each chip is corresponding one by one with the chip time of 5 128chips of timing, and 5 128chips of take are the cycle, circulation storage.When reading antenna data, according to several factors such as the initial phase offset of No. ID, the antenna of task appointment, search window, coherent accumulation counting and the long countings of search window window, determine and read RAM address, because the parallel number reading of antenna RAM is 32, and these 32 independently antenna data need two correlations just can be finished, so the antenna data of reading need to carry out shifting processing, the antenna data that is depicted as continuous four correlations as arrow in Figure 11 reads pattern.
PN code generator module is according to the parameters such as the time slot ID of each task appointment, symbol ID, initial scrambler and frequency pilot sign number, 16 the plural PN codes of this task of parallel output on user's frame assigned address.This PN code mates the antenna data with corresponding to reach the object of descrambling, despreading, depolarization.The realization of this module as shown in figure 12, further comprises the intermediate stores such as scrambling generator (scmgen), rotary code generator (rotgen), PN synthesizer (pncomb) and xymidram, rotvecrom, pilotram.Xymidram memory is preserved the intermediateness of X/Y register each 25bits of each task in scrambler production process; Rotvecrom read-only memory is preserved 150 * 4 rotating vectors of 150 character positions in a frame, and each rotating vector is 25 bits; The pilot time slot form of pilotrom read-only memory storage DPCCH channel.Scmgen module determines that the parameter by inputting extract from xymidram the value of current X/Y register, and according to the scrambler of 16 25bits of scrambler generation rule generation that stipulated by agreement, then rotgen module is carried out multiplication of vectors by 24 rotating vectors of this scrambler and this task of reading from rotvecrom, then mould 2 adds, obtain the vector output of 4 16bits, the pilot symbol data and the rotcode that finally by pncomb module, read active user from pilotram carry out corresponding computing and get conjugation, obtain 16 final plural PN codes.
Multipath detection module, for the antenna data receiving is relevant to PN code, then according to the be concerned with/incoherent length on upper strata, carry out twice to relevant accumulation result and adds up, and obtains CDP or the ADP of designated user.Because multipath detects the multiple that the length legislations of search window is 16, so adopt 16 road detection modules 16 search windows to be carried out to relevant treatment simultaneously, as shown in figure 13, be mainly divided into six steps, in the mode of streamline, realize.16 rank correlators slide for searcher chip and are correlated with, a search window inside, only slide antenna data and the constant feature of PN code of being correlated with, from 32 chip antenna datas of input, select the PN code of corresponding 16 chip antenna datas and 16 chips multiply each other one by one and add up, two sample points of each chip are independently relevant, parallel work-flow.Frequency compensation module be take 64chips and the subscriber signal receiving is carried out to corresponding compensate of frequency deviation as step-length, for the DTX situation of compact model GAP and CPC, also by the initial frequency deviation of software configuration, compensates accordingly, does not do special processing.Coherent accumulation module is mainly used in each Offset of 2 sample points of each search mission, according to the coherent accumulation length of high-rise appointment, the value of autocorrelator module output in the future adds up to the middle accumulation result in coherent accumulation buffer memory or replaces the middle accumulation result in relevant cumulative buffer memory by the value of relevant output.Calculate ADP module, according to the approximate data of TI_abs, IQ two-way plural number is asked to mould, obtain signless ADP value.Noncoherent accumulation module is mainly used in asking the unsigned number after mould and the middle accumulation result in noncoherent accumulation buffer memory adds up or with asking unsigned number after mould to replace the middle accumulation result in noncoherent accumulation buffer memory.
Step S810: be the multipath detection calculations result to certain first symbol of task if current, directly by result store to the corresponding memory block of memory block ID of distributing to this task in step S806, otherwise, according to sense data in IDCong memory block and after merging with it, store this Resource Block into.
Step S812: whether all symbols that judge this task are finished, if be finished, goes to step S814; Otherwise, transfer to step S806, wait for the arrival of the next symbol time of this task.
Step S814: after all symbols of certain task have moved, notice reporting module reports result of calculation, reporting module is moved result the memory block of software appointment, and reclaims memory block resource.
Step S816: software, after receiving reporting information, carries out respective handling to data, then does multipath according to multipath algorithm and selects.
In another embodiment, also provide a kind of software, the technical scheme that this software is described for carrying out above-described embodiment and preferred implementation.
In another embodiment, also provide a kind of storage medium, stored above-mentioned software in this storage medium, this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.
From above description, can find out, the present invention has realized following technique effect: be assigned in the Multipath searching task of hardware and pre-determined this Multipath searching task at the required hardware resource taking of different time sections, so just can be so that when this Multipath searching task take this part resource yet, these hardware resources are distributed to other task to be used, thereby solved the technical problem that cannot control effectively to the hardware resource of Multipath searching in prior art, reached the time division multiplexing to hardware resource, thereby improved the utilance of hardware resource during multipath detects.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a multi-path detecting method, is characterized in that, comprising:
Receive Multipath searching task, wherein, described Multipath searching task comprises: described Multipath searching task allows the indication information of the hardware resource that takies on the time period of different length;
For described Multipath searching task is distributed described hardware resource;
According to the described hardware resource distributing, described Multipath searching task is carried out to multipath detection.
2. method according to claim 1, it is characterized in that, described Multipath searching task on the time period of different length, allow the indication information of the hardware resource that takies comprise following one of at least: corresponding to described Multipath searching task, at each of AP, each time slot of each AP and each symbol of described each time slot allow the indication information of the hardware resource that takies cycle of activity.
3. method according to claim 2, is characterized in that, in described Multipath searching task, by setting corresponding bit, indicates whether to allow to take hardware resource.
4. method according to claim 3, is characterized in that, for identifying each symbol, whether to allow to take the frequency pilot sign that the bit of hardware resource is corresponding with this symbol identical.
5. according to the method described in any one in claim 1 to 4, it is characterized in that, for described Multipath searching task, distribute described hardware resource and comprise:
Judge whether current hardware resource meets the indicated resource of described indication information;
If so, according to described indication information, hardware resource is distributed to described Multipath searching task;
If not, according to current hardware resource situation, be that described Multipath searching task is distributed hardware resource again.
6. according to the method described in any one in claim 1 to 4, it is characterized in that, according to the described hardware resource distributing, described Multipath searching task carried out to multipath detection and comprise:
Read the antenna data corresponding to described Multipath searching task, wherein, described antenna data is recycled and is stored in buffer memory;
According to the described hardware resource distributing, the antenna data reading is carried out to multipath detection.
7. method according to claim 6, is characterized in that, in described buffer memory, storage and timing are less than the corresponding chip of antenna of predetermined threshold.
8. according to the method described in any one in claim 1 to 4, it is characterized in that, also comprise:
The storage resources of system is divided into one or more storage resources pieces, when receiving described Multipath searching task, according to the resource of described Multipath searching required by task, be that described Multipath searching task is distributed one or more storage resources pieces, wherein, the storage resources piece of distribution is for storing the testing result that described Multipath searching task is carried out to multipath detection.
9. a multi-path detection device, is characterized in that, comprising:
Receiving element, for receiving Multipath searching task, wherein, described Multipath searching task comprises: described Multipath searching task allows the indication information of the hardware resource that takies on the time period of different length;
Allocation units, are used to described Multipath searching task to distribute described hardware resource;
Detecting unit, for carrying out multipath detection according to the described hardware resource distributing to described Multipath searching task.
10. device according to claim 9, is characterized in that, described allocation units comprise:
Judge module, for judging whether current hardware resource meets the indicated resource of described indication information;
The first distribution module, in the situation that judgement is, distributes to described Multipath searching task according to described indication information by hardware resource;
The second distribution module, in the situation that judgement is no, is that described Multipath searching task is distributed hardware resource according to current hardware resource situation again.
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