CN101102123A - Mixing service RAKE receiving device based on broadband CDMA system and its method - Google Patents
Mixing service RAKE receiving device based on broadband CDMA system and its method Download PDFInfo
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Abstract
The invention is concerned with the mixing operation RAKE receiver of broad band code division multiple access system (CDMA) and the method. In contrast with the current time delay demodulation RAKE receiver, it adds the antenna data speed reading/repeat module, the multi-pathway parameter control module. It is that the antenna data speed reading/repeat module speeds up the reading of the antenna read-write control module or repeat reading of the deferred antenna data of the data memorizer, generates the final control channel data and the data channel information after processed by the after-progress module separately, according to the multi-pathway parameter of the multi-pathway parameter control module and the deferred antenna data of the multi-pathway demodulation module. It fulfills the processing time demand of the high speed operation data channel of WCDMA.
Description
Technical field
The present invention relates to broadband CDMA system (WCDMA, Wideband-Code DivisionMultiple Access) base station baseband treatment technology, be particularly related to a kind of support the to mix E-DPCH (up enhancing DPCH, Enhanced DedicatedPhysical Channel) of up-high speed Traffic Channel such as R6 agreement and the up receiving system in base station and the method for R99 business.
Background technology
In the WCDMA wireless communication system, because the spacing wireless transmission environment is complicated and abominable, therefore receives usually and adopt the RAKE receiver device, by many multipaths are carried out demodulation, carry out high specific then and merge and recover wireless signal.
The RAKE receiver of traditional base station baseband processor has following two kinds of implementations usually in the WCDMA system:
(1) a kind of is Dedicated Physical Control Channel (DPCCH) and Dedicated Physical Data Channel (DPDCH) while demodulation modes.
In this pattern, because the spreading factor (SF) of the DPDCH of present frame is unknown, can only carry out demodulation by minimum SF, behind the DPCCH and DPDCH Deng the intact frame of demodulation, collect all transformats and merge indication (TFCI, Transport Format Combination Indicator) symbol data decoding obtains actual SF, and this frame DPDCH that demodulation is finished carries out quadratic integral more at last.
(2) another kind is that Dedicated Physical Data Channel (DPDCH) postpones the delayed mode that Dedicated Physical Control Channel (DPCCH) frame carries out demodulation.
In this pattern, DPCCH normally carries out demodulation, collects all TFCI symbol data decoding after the intact frame of demodulation and obtains actual SF, and then begin to carry out the DPDCH demodulation, and DPDCH demodulation at this moment can be undertaken by the SF of reality.
In Release 1999, because handling, DPCH (DPCH) do not have strict time requirement, and simultaneity factor has the restriction of minimum SF at different business needs, and for example the minimum SF of data service is 4, and the scope of corresponding actual SF is 4,8 and 16.Therefore, adopt above-mentioned two kinds of RAKE receiver devices, postpone more economize on hardware resource of demodulation modes ratio while demodulation modes, because can use actual SF to separate the mediation storage, and reduced the link of quadratic integral, therefore most of communication systems all adopt the delay demodulation modes.
But for the R6 agreement of 3rd Generation Partnership Project (3GPP) and follow-up agreement thereof, increased the up-high speed business, the reception of these up-high speed business is handled, and has made comparatively strict regulation in agreement, dwindles greatly in the processing time-delay that base station system is total.For example the R6 agreement has increased up enhancing DPCH (E-DPCH, Enhanced Dedicated Physical Channel), and the processing of this channel has strict timing restriction.According to the 3GPP regulation, can not surpass 8.3ms in the total processing time-delay of base station system for 2ms Transmission Time Interval (TTI); 10ms Transmission Time Interval TTI can not surpass 24.3ms in the total processing time-delay of base station system.According to this restriction, adopt the RAKE receiver device that postpones demodulation modes to handle E-DPCH, can't satisfy the requirement of system handles time restriction.The same RAKE receiver device that postpones demodulation modes all can't satisfy the requirement of system handles time restriction for the follow-up newly-increased channel of agreement of R6.
The business of up-high speed business variation simultaneously is very fast, and is real-time dynamic change.For example the SF of the 3GPPR6 agreement regulation E-DPDCH reality scope that can change is to change arbitrarily between 2～256, do not need to rebuild Radio Link, also promptly all users' minimum SF is 2, but actual SF is any one value in 2,4,8,16,32,64,128,256.If adopt the synchronous demodulation pattern according to these characteristics, all users must come demodulation E-DPDCH by SF=2, wait until that always the E-DPCCH demodulation finishes a TTI, have collected whole ETFCI, and decoding obtains actual SF quadratic integral again.During for SF=2, a 10msTTI has 19200 data, when number of users reaches 128, at first needs to store lot of data, handles simultaneously so multidata and need just can finish up to the operating frequency of 250MHz in a TTI.When therefore number of users is many, needs very big storage resources to meet this requirement, and need very high data processing frequency, thereby increased difficulty and cost that system realizes.
Suppose that multi-path demodulation module correlator length is the m chip.RAKE receiver device to existing two kinds of patterns is specifically described below.
As shown in Figure 1, shown the synchronous demodulation pattern RAKE receiver device of WCDMA system conventional, this device has satisfied the processing time requirement of up-high speed traffic data channel in the R6 agreement of 3GPP and the follow-up agreement, but needs very big data storage resource.
From the accompanying drawing 1 as can be seen, for traditional synchronous demodulation pattern RAKE receiver device, the antenna data of input is directly inputted to antenna data cache module buffer memory, then each clock cycle send the m chip antenna data to the multi-path demodulation module, simultaneously customer parameter control module control scrambler and channel code generation module produce corresponding scrambler and channel code and also deliver to the multi-path demodulation module.Antenna data with input in the multi-path demodulation module carries out relevant accumulating operation with scrambler, channel code, carry out according to minimum SF when wherein data channel is correlated with accumulating operation, distinguish the symbol data of controlled channel (DPCCH) and the symbol data of data channel (DPDCH) like this.The symbol data of control channel is delivered to control channel symbol processing module and is carried out that channel estimating, high specific merge, the TFCI symbol extracts all TFCI symbols that obtain a frame.Whole TFCI symbol datas of one frame are delivered to the TFCI decoding module and are deciphered, and obtain the SF of the reality of corresponding data channel after the decoding, and the SF of reality is delivered to data channel quadratic integral module.In data channel quadratic integral module, at first be to have stored the whole data channel symbol data that obtains before the actual SF, and then read these symbol datas and carry out two sub-symbols according to the SF of reality and add up and obtain the final data channel symbol.
As shown in Figure 2, the time-delay demodulation modes RAKE receiver device that has shown the WCDMA system conventional, the antenna data of this device storage one frame time is used for the corresponding actual SF of DPDCH acquisition and just begins demodulation then, and the speed that postpones antenna data input speed and demodulation speed and direct input aerial data is the same, thereby causes total demodulation process chronic.
From the accompanying drawing 2 as can be seen, for traditional time-delay demodulation modes RAKE receiver device, the control of antenna data read-write control module is stored the antenna data of input in the antenna data memory into, simultaneously the antenna data of input and the time-delay antenna data of having stored is delivered to the multi-path demodulation that follow-up antenna data cache module is used for the back.The antenna data cache module will be delayed time and the antenna data of directly input buffer memory all, then each clock cycle send the m chip antenna data to the multi-path demodulation module, simultaneously customer parameter control module control scrambler and channel code generation module produce corresponding scrambler and channel code and also deliver to the multi-path demodulation module.Antenna data with input in the multi-path demodulation module carries out relevant accumulating operation with scrambler, channel code, distinguishes the symbol data of controlled channel (DPCCH) and the symbol data of data channel (DPDCH) like this.The symbol data of control channel is delivered to control channel symbol processing module and is carried out that channel estimating, high specific merge, the TFCI symbol extracts all TFCI symbols that obtain a frame.Whole TFCI symbol datas of one frame are delivered to the TFCI decoding module and are deciphered, and obtain the SF of the reality of corresponding data channel after the decoding, and the SF of reality is delivered to the customer parameter control module, are used to control scrambler and channel code and produce.
In sum, two kinds of traditional RAKE receiver devices all can't satisfy the R6 agreement of WCDMA and follow-up protocol requirement thereof, must adopt a kind of newly, both satisfy the time restriction requirement, not need the RAKE receiver device and the corresponding RAKE method of reseptance thereof of too big storage resources again.
Summary of the invention
Technical problem to be solved by this invention is, a kind of mixing service RAKE receiving device and method based on WCDMA is provided, thereby when not needing too big storage resources, satisfy the R6 agreement of WCDMA and the requirement of follow-up protocol processes time thereof, especially satisfy the requirement of supporting that up-high speed is professional and the R99 mix of traffic exists base station processing time limits.
The invention provides a kind of mixing service RAKE receiving device of broadband CDMA system, comprise antenna data read-write control module, the antenna data memory, the antenna data cache module, the multi-path demodulation module, scrambler and channel code generation module, the customer parameter control module, control channel symbol data processing module, the TFCI decoding module, its characteristics are, comprise that also the antenna data that links to each other with antenna data read-write control module quickens to read/replicated blocks, with the antenna data cache module, the multi-path demodulation module, the multipath parameter control module that scrambler and channel code generation module link to each other respectively, wherein:
Described antenna data quickens to read/replicated blocks, is used for producing antenna data acceleration/repeat control signal and comes control antenna data read-write control module to quicken to read or repeat to quicken to read the delay antenna data that is stored in the antenna data memory;
Described multipath parameter control module, be used to store the multipath parameter of different service types, according to the classification of the difference of business with uplink data channels respectively 2 transmission of respective antenna data issue the multipath parameter and control to the antenna data cache module antenna data is carried out buffer memory, issue the multipath parameter and control in the multi-path demodulation module demodulation speed, control scrambler jointly with the customer parameter control module and the channel code generation module produces scrambler and the channel code that corresponding multi-path demodulation module needs for control channel and data channel to the multi-path demodulation module;
Described antenna data cache module, the antenna data of direct input and the antenna data of time-delay storage post acceleration input are carried out buffer memory, antenna data for direct input, distribute to 1 memory cell of every multipath of control channel, the data of each cell stores m chip, for the antenna data of time-delay storage post acceleration input, distribute to 1 memory cell of every multipath of data channel, the data of each cell stores 2m chip.
Further, described antenna data quickens to read/and replicated blocks are when producing antenna data acceleration/repeat control signal, the time average of one frame is divided into 2 parts, the time that is every part is field, be divided into and quicken the processing time and repeat to quicken the processing time, control antenna data read-write control module quickens to read the up-high speed traffic data channel of the delay antenna data that is stored in the mixed service in the antenna data memory respectively, perhaps repeat to quicken to read the up R99 traffic data channel of the delay antenna data that is stored in the mixed service in the antenna data memory, control antenna data read-write control module to control channel in the time-delay antenna data adopt with the input aerial data mutually same rate read.
Further, the multipath parameter that described multi-path demodulation module is sent here according to multipath parameter control module, control the corresponding scrambler and the channel code of scrambler and the generation of channel code generation module jointly by customer parameter control module and multipath parameter control module, the antenna data with time-delay to direct input carries out correlation demodulation, export working control channel data and data channel signal respectively, wherein, data channel for the time-delay antenna data carries out 2m chip antenna data and 2m chip scrambler with each timeticks, the correlation demodulation of channel code calculates, and carries out m chip antenna data and m chip scrambler for the control channel of time-delay antenna data with each timeticks, the correlation demodulation of channel code calculates.
Further, described antenna data memory is used to store the antenna data of time-delay; Described antenna data read-write control module, be used for quickening according to antenna data reading/control of replicated blocks quickens to read or quicken to read the time-delay antenna data that the antenna data memory is stored, and the antenna data of input and time-delay antenna data are sent to described antenna data cache module carry out demodulation for the multi-path demodulation module; Described control channel symbol data processing module is carried out channel estimating with the control channel data and high specific merges, and the TFCI symbol data that extracts in the control channel is delivered to the TFCI decoding module; Described TFCI decoding module is deciphered the spreading factor SF that obtains the reality of data channel that should control channel according to the TFCI symbol data of input, and is delivered to the customer parameter control module; Described customer parameter control module obtains the spreading factor SF of data channel reality, then the spreading factor SF information of reality is delivered to scrambler and the channel code generation module is used to produce scrambler and channel code is sent the multi-path demodulation module back to; Described multi-path demodulation module, the data channel signal that calculates according to correlation demodulation, and the scrambler and the final dateout channel symbol of the channel code data that produce according to actual spreading factor SF.
Further, the ratio of each memory cell data channel buffer memory number of chips and control channel buffer memory number of chips equals to quicken in the described antenna data read-write control module to read the ratio of speed with the speed that directly reads antenna data of data channel in the buffer memory time-delay antenna data in the described antenna data cache module; The number of chips that described multi-path demodulation module is carried out demodulation to the data channel of time-delay antenna data at each timeticks and control channel carry out the ratio of the number of chips of demodulation, equal to quicken in the described antenna data read-write control module to read the ratio of speed with the speed that directly reads antenna data of data channel in the buffer memory time-delay antenna data.
The present invention also provides a kind of mixing service RAKE method of reseptance, comprises the steps:
Step 1 quickens to read or to repeat the time-delay antenna data that quickens to read according to the multipath parameter, and the antenna data of time-delay antenna data and directly input is carried out buffer memory;
Step 2, antenna data and scrambler, channel code according to multipath parameter and corresponding multipath carry out multi-path demodulation to the antenna data of buffer memory, export working control channel data and data channel signal respectively, wherein the data channel in the time-delay antenna data is quickened demodulation;
Step 3, obtain the actual spreading factor of data channel signal according to the multi-path demodulation symbol of working control channel, carrying out channel estimating and high specific merges, extract the TFCI symbol in the control channel, the actual spreading factor SF that obtains the corresponding data channel after the decoding is used to produce scrambler and channel code, demodulates the data channel signal of final output.
In the step 1, described multipath comprises the multipath of up R99 traffic data channel of up-high speed traffic data channel, the data channel of control channel, data channel.
In the step 1, for the time-delay antenna data, one frame time is divided into the acceleration processing time and repeats to quicken processing time two fields, the up-high speed traffic data channel of data channel is repeating to quicken the up R99 traffic data channel that the processing time repeats to quicken data channel in the read latch antenna data in quickening processing time acceleration read latch antenna data.
In the step 1, when carrying out buffer memory, for the time-delay antenna data, distribute to 1 memory cell of every multipath of control channel, the data of each cell stores m chip are distributed to 1 memory cell of every multipath of data channel, the data of each cell stores 2m chip.
Separate timing in the step 2, calculate with the correlation demodulation that each timeticks carries out 2m chip antenna data and 2m chip scrambler, channel code according to corresponding multipath parameter for the data channel of time-delay antenna data, the dateout channel data, calculate output working control channel data and data channel signal for the control channel of time-delay antenna data with the correlation demodulation that each timeticks carries out m chip antenna data and m chip scrambler, channel code according to corresponding multipath parameter.
In the step 1, the ratio of the number of chips of each memory cell data channel buffer memory and the number of chips of control channel buffer memory equals to quicken the ratio of the speed of data channel in the read latch antenna data and the speed that directly reads antenna data when carrying out buffer memory;
In the step 2, the number of chips of the data channel of time-delay antenna data being carried out demodulation at each timeticks and control channel carry out the ratio of the number of chips of demodulation, equal to quicken the ratio of the speed of data channel in the read latch antenna data and the speed that directly reads antenna data.
The present invention has overcome that traditional synchronous demodulation pattern RAKE receiver need take more storage resources and traditional delay demodulation modes RAKE receiver need be than the shortcoming of long process time.Though quicken to cause hardware resource of the present invention to increase to some extent owing to postpone demodulation, but at first it has satisfied the processing time requirement of up-high speed traffic data channel in the R6 agreement of WCDMA and the follow-up agreement, secondly the transfer of data that the increase of hardware resource is caused than the synchronous demodulation pattern and the hardware resource of storage needs lack a lot, last its control realizes fairly simple, is convenient to realize.
Description of drawings
Fig. 1 is the synchronous demodulation pattern RAKE receiver device schematic diagram of WCDMA system conventional;
Fig. 2 is the delay demodulation modes RAKE receiver device schematic diagram of WCDMA system conventional;
The WCDMA system RAKE receiver device schematic diagram that Fig. 3 provides for the embodiment of the invention;
Fig. 4 (a) quickens to read/acceleration/repetition control timing figure of replicated blocks for antenna data in the device shown in Figure 3;
Fig. 4 (b) is that the multi-path demodulation module is quickened demodulation up-high speed traffic data channel/acceleration demodulation R99 traffic data channel sequential chart in the device shown in Figure 3;
Fig. 5 (a) is the antenna data buffer structure schematic diagram of traditional RAKE receiver device control channel;
Fig. 5 (b) is the antenna data buffer structure schematic diagram of the control channel of receiving system shown in Figure 3;
Fig. 6 (a) is the antenna data buffer structure schematic diagram of traditional RAKE receiver device data channel;
Fig. 6 (b) is the antenna data buffer structure schematic diagram of the data channel of receiving system shown in Figure 3;
Fig. 7 (a) is the multipath parameter control structure schematic diagram of traditional RAKE receiver device control channel;
Fig. 7 (b) is the multipath parameter control structure schematic diagram of the control channel of receiving system shown in Figure 3;
Fig. 8 (a) is the multipath parameter control structure schematic diagram of traditional RAKE receiver device data channel;
Fig. 8 (b) is the multipath parameter control structure schematic diagram of device high speed uplink traffic data channel shown in Figure 3;
Fig. 8 (c) is the multipath parameter control structure schematic diagram of device R99 traffic data channel shown in Figure 3.
Embodiment
From traditional RAKE receiver illustrated in figures 1 and 2 as can be seen, the main advantage of RAKE receiver device of synchronous demodulation pattern is to satisfy the processing time requirement of up-high speed traffic data channel in the R6 agreement of 3GPP and the follow-up agreement, is to remedy transmission and the big shortcoming of storage data volume that the synchronous demodulation pattern causes and postpone the advantage that demodulation modes RAKE receiver device mainly is.
But the processing time of time-delay demodulation modes RAKE receiver device can't be satisfied the processing time requirement of up-high speed traffic data channel in the R6 agreement of 3GPP and the follow-up agreement, therefore needs to reduce the processing time of time-delay demodulation modes RAKE receiver device.Because time-delay demodulation modes RAKE receiver device has been stored the antenna data of a frame time and has been used for corresponding DPDCH and obtains actual SF and just begin demodulation then, and the speed of the time-delay antenna data input speed of tradition time-delay demodulation modes RAKE receiver device and demodulation speed and direct input aerial data is the same, thereby cause total demodulation process chronic, therefore only need quicken to postpone the input speed and the multi-path demodulation speed of antenna data to the up-high speed traffic data channel, just can reduce total demodulation process time of up-high speed traffic data channel, reach the processing time requirement of up-high speed traffic data channel in the R6 agreement of 3GPP and the follow-up agreement.
Based on top consideration, in the main design of technical solution of the present invention:
On the one hand, adopt to postpone demodulation modes, corresponding E-DPDCH can only adopt minimum SF=2 demodulation when having avoided synchronous demodulation, produces the lot of data symbol, causes the problem of transfer of data and storage difficulty;
On the other hand, postponing on the demodulation modes basis, quicken the mode of demodulation for the The data of up-high speed traffic data channel delay, make and postpone the shortening of demodulated data demodulation time, thereby satisfy for example E-DPCH processing time requirement for restriction of R6 agreement of the pairing up-high speed traffic data channel of R6 agreement and follow-up agreement thereof, quicken output thereby for example can quicken 2 times of preceding fields that only need to take a frame;
Simultaneously, repeat to quicken output in the later half frame time of a frame, the current acceleration exported the data channel that is used to quicken demodulation R99 business, quickens the data of demodulation one frame in the time at field equally.
Below in conjunction with the drawings and specific embodiments technical solution of the present invention is described in further detail.Suppose that wherein accelerating velocity is 2 times of speed of direct input aerial data, multi-path demodulation module correlator length is the m chip.
As shown in Figure 3, shown and supported up-high speed the traffic data channel for example E-DPCH in the R6 agreement and the mixing RAKE receiving system of R99 uplink business data channel in the WCDMA provided by the invention system.This mixing service RAKE receiving device comprises:
Antenna data quickens to read/replicated blocks, antenna data read-write control module, antenna data memory, antenna data cache module, multi-path demodulation module, scrambler and channel code generation module, multipath parameter control module, customer parameter control module, control channel symbol data processing module, TFCI decoding module.
Wherein, the multi-path demodulation module respectively with multipath parameter control module, the antenna data cache module, control channel symbol processing module, scrambler links to each other with the channel code generation module, the antenna data memory respectively with the antenna data cache module, antenna data read-write control module links to each other, antenna data quickens to read/and replicated blocks link to each other with antenna data read-write control module, the TFCI decoding module respectively with control channel symbol processing module, the customer parameter control module links to each other, the customer parameter control module links to each other with the channel code generation module with scrambler, multipath parameter control module respectively with the antenna data cache module, the multi-path demodulation module, scrambler links to each other with the channel code generation module.
Compare with traditional delay demodulation modes RAKE receiver device shown in Figure 2, in this mixing service RAKE receiving device shown in Figure 3, described antenna data memory, antenna data read-write control module, multi-path demodulation module, scrambler and channel code generation module, customer parameter control module, control channel symbol data processing module, TFCI decoding module are identical with traditional delay demodulation modes RAKE receiver device.
But described antenna data quickens to read/replicated blocks, multipath parameter control module are the modules that the present invention increases newly, and described antenna data cache module is different with the corresponding function of traditional delay demodulation modes RAKE receiver in the present invention.Wherein:
Described antenna data quickens to read/replicated blocks, is used for control antenna data read-write control module and quickens to read or repeat to quicken to read the delay antenna data that is stored in the antenna data memory.It is divided into 2 parts with the time average of a frame, and promptly the time of every part is field, is divided into quickening the processing time and repeating to quicken the processing time.
Described multipath parameter control module, according to the classification of the difference of business with uplink data channels respectively 2 transmission of respective antenna data issue data channel multipath parameter to the multi-path demodulation module, thereby in the control multi-path demodulation module for the demodulation speed of control channel and data channel.Wherein adopt different speed to carry out demodulation for control channel and data channel.The parameter control that multipath parameter control module provides is a correlation demodulation for control channel, and the parameter control that provides for data channel is twice correlation demodulation, is for the first time to quicken demodulation process, is to repeat to quicken demodulation process for the second time.And traditional RAKE receiver demodulating data channel still is a control channel all is to carry out demodulation with identical speed.Simultaneously, also the difference classification according to business will issue the multipath parameter to the antenna data cache module, the control antenna data are carried out buffer memory, control scrambler and channel code generation module jointly with the customer parameter control module and produce scrambler and the channel code that corresponding multi-path demodulation module needs;
The antenna data cache module, the places different with antenna data cache module in traditional RAKE receiver are: because the delay antenna data of input is to quicken input, therefore the antenna data cache way is different, during buffer memory, every multipath of control channel only needs 1 memory cell, and the data of each cell stores m chip are used for the multi-path demodulation of back; The multipath of data channel is because the delay antenna data of input is 2 extraordinarily speed inputs, and therefore every multipath is in requisition for continuous 1 memory cell, and the data of each cell stores 2m chip are used for the multi-path demodulation of back.
In RAKE receiving system shown in Figure 3, read and write control module from the antenna data of antenna input through antenna data and be written to the antenna data memory.The antenna data memory is used for the antenna data of storage delay.Antenna data quickens to read/and replicated blocks produce antenna data accelerations/repeat control signal and read and write control module to antenna data and quicken to read or repeat to quicken to read the antenna data of delay.Under the control of antenna data read-write control module, directly the antenna data of input is delivered to buffer memory the antenna data cache module with the antenna data that postpones to quicken to read from the antenna data memory, and reads the antenna data of corresponding multipath according to the multipath Control Parameter that multipath parameter control module provides.The antenna data of reading is delivered in the multi-path demodulation module.Multipath parameter control module control scrambler and channel code generation module are delivered in the multi-path demodulation module according to scrambler and channel code that the multipath parameter produces corresponding multi-path demodulation simultaneously.The multi-path demodulation module is carried out related operation according to the control information that multipath parameter control module provides to antenna data and scrambler, the channel code of importing, and exports control channel data and data channel signal respectively.Wherein the control channel data are delivered to and are carried out channel estimating and high specific merging in the control channel symbol data processing module, and the TFCI symbol data that extracts in the control channel is delivered in the TFCI decoding module.The TFCI decoding module is deciphered the SF that obtains the reality of data channel that should control channel according to the symbol data of input, and delivers in the customer parameter control module.The customer parameter control module obtains the SF of data channel reality, then the SF information of reality is delivered to scrambler and the channel code generation module is used to produce channel code.The final dateout channel symbol of multi-path demodulation module data.
Based on mixing service RAKE receiver apparatus shown in Figure 3, it supports that in WCDMA the method for reseptance of mixed service channel comprises the steps:
Step 301, the control of antenna data read-write control module is stored the antenna data of input in the antenna data memory into, simultaneously the antenna data of input and the time-delay antenna data of having stored is delivered to the multi-path demodulation that follow-up antenna data cache module is used for the back.
Wherein, the antenna data of input is directly inputted in the antenna data cache module, and the delay data of having stored quickens according to antenna data to read/and the control of replicated blocks is input in the antenna data cache module.Begin the input aerial data quickening to postpone if desired, then control antenna data read-write control module is quickened from the antenna data memory read latch antenna data and is input to the antenna data cache module, if corresponding time-delay antenna data has quickened to read to finish, then control antenna data read-write control module field before later half frame time repeats to quicken to read quickens the time-delay antenna data that reads in the time.
Step 302, the antenna data of antenna data that the antenna data cache module will directly be imported and delay storage post acceleration input is stored according to the correlator length of multi-path demodulation module; Simultaneously multipath parameter control module is according to the difference of control channel, data channel, and the difference of data channel type of service, and the multipath parameter of each class is stored.
Wherein, for the antenna data of direct input, the antenna data of each antenna data buffer unit storage m chip.For the antenna data that quickens 2 times of inputs, because the antenna data amount of importing in the unit interval is 2 times of direct input aerial data, therefore each antenna data buffer unit is stored the antenna data of 2m chip, thereby satisfies the requirement of the acceleration demodulation of the corresponding multipath of these antenna data.Antenna data channel service type comprises control channel, up-high speed traffic data channel, up R99 traffic data channel.
Step 303, each timeticks, the antenna data cache module reads the antenna data of 1 antenna data buffer unit storage, and (control channel is the m chip, data channel is the 2m chip) be input to the multi-path demodulation module, multipath parameter control module reads a multipath parameter and is input to the multi-path demodulation module.While customer parameter control module and multipath parameter control module control scrambler jointly and the channel code generation module produces scrambler and the channel code that corresponding multi-path demodulation module needs.
Wherein, the customer parameter control module mainly is to control the generation of scrambler and channel code according to the SF of user's scrambler number and user's reality.Multipath parameter control module mainly is the length number of times that control scrambler and channel code produce, for control channel, each scrambler and channel code that needs to produce the m chip lengths, but then need to produce the scrambler and the channel code of 2m chip lengths at every turn and control the scrambler and the channel code that produce are delivered in the multi-path demodulation module for data channel.
Step 304, the multi-path demodulation module is carried out correlation demodulation according to the control of multipath parameter control module with antenna data and scrambler, the channel code of importing, and according to the difference of channel code, the multi-path demodulation module is summed into symbol with the DPCCH that produces, the multi-path demodulation result of E-DPCCH control channel; Perhaps the DPDCH of R99 business, up-high speed data service for example the multi-path demodulation result of the E-DPDCH data channel of R6 be summed into symbol and deliver to respectively in the follow-up separately processing module.
Wherein, for DPCCH and E-DPCCH control channel, only need 1 timeticks to carry out the correlation computations of m chip antenna data and m chip scrambler, channel code; For the DPDCH of R99 business, up-high speed data service for example the E-DPDCH of R6 need 1 timeticks, each timeticks carries out the correlation computations of 2m chip antenna data and 2m chip scrambler, channel code.
Step 305, the multi-path demodulation symbolic result of control channel sends to that control channel symbol processing module carries out that channel estimating, high specific merge, the TFCI symbol extracts all TFCI symbols that obtain a frame or a TTI and delivers to the TFCI decoding module and decipher, decoding obtains corresponding DPDCH, the SF of E-DPDCH reality and delivers to the customer parameter control module, is used to control DPDCH, E-DPDCH scrambler, channel code generation.For the multi-path demodulation outcome symbol of data channel, directly send and carry out follow-up system handles.
Fig. 4 (a) is that antenna data quickens to read/acceleration/repetition control timing figure of replicated blocks in the device shown in Figure 3.Fig. 4 (b) is the sequential chart that the multi-path demodulation module is quickened demodulation up-high speed traffic data channel/acceleration demodulation R99 traffic data channel in the device shown in Figure 3.As can be seen from Figure 4, quicken to read at antenna data/replicated blocks control under, be that the antenna data reading speed of t is 2 times of the direct antenna data of importing time of delay, therefore for the direct antenna data input time of a frame, the time that only needs half also is the field time to quicken to read in antenna data.Corresponding multi-path demodulation module also only needs the field time to finish for example demodulation of the E-DPDCH in the R6 agreement of up-high speed traffic data channel.The remaining field time then repeats to quicken to read the delay antenna data, and corresponding multi-path demodulation module is also finished the demodulation to the R99 traffic data channel within this field.
Fig. 5 is the antenna data buffer structure comparison diagram of control channel in the antenna data cache module of RAKE receiver device shown in Figure 3 and traditional RAKE receiver device.Suppose 0,1 ..., n-1 days wire sizes are sky wire sizes of input, difference correspondence 0,1 ..., the antenna data stream of n-1.
For traditional RAKE receiver device, corresponding of every multipath of control channel needs 1 memory cell, and the data of each cell stores m chip are used for the multi-path demodulation of back, shown in Fig. 5 (a).
For RAKE receiver device shown in Figure 3, every multipath of control channel only needs 1 memory cell, and the data of each cell stores m chip are used for the multi-path demodulation of back, shown in Fig. 5 (b).
Fig. 6 is the antenna data buffer structure comparison diagram of data channel in the antenna data cache module of RAKE receiver device shown in Figure 3 and traditional RAKE receiver device.
For traditional RAKE receiver device, corresponding of every multipath of data channel needs 1 memory cell, and the data of each cell stores m chip are used for the multi-path demodulation of back, shown in Fig. 6 (a).
For RAKE receiver device shown in Figure 3, the multipath of data channel is because the delay antenna data of input is 2 extraordinarily speed inputs, therefore every multipath is in requisition for continuous 1 memory cell, and the data of each cell stores 2m chip are used for the multi-path demodulation of back, shown in Fig. 6 (b).
Fig. 7 is the multipath parameter control timing comparison diagram of control channel of the multipath parameter control module of RAKE receiver device shown in Figure 3 and traditional RAKE receiver device.
For traditional RAKE receiver device, the multipath parameter of control channel all is to arrange by user's order, and the multi-path demodulation module parameter that control sequence issues according to the multipath parameter is carried out the multi-path demodulation processing then, shown in Fig. 7 (a).
For RAKE receiver device shown in Figure 3, control channel is identical with the multipath parameter controlling mechanism of traditional RAKE receiver device, shown in Fig. 7 (b).
Fig. 8 is the multipath parameter control timing comparison diagram of data channel of the multipath parameter control module of RAKE receiver device shown in Figure 3 and traditional RAKE receiver device.
For traditional RAKE receiver device, the multipath parameter of data letter all is to arrange by user's order, and the multi-path demodulation module parameter that control sequence issues according to the multipath parameter is carried out the multi-path demodulation processing then, shown in Fig. 8 (a).
For RAKE receiver device shown in Figure 3, in the present embodiment,, be divided into up-high speed traffic data channel for example the multipath parameter list and the R99 traffic data channel multipath parameter list of E-DPDCH channel for data channel.Wherein the up-high speed traffic data channel for example the multipath parameter list of E-DPDCH channel be used to control the preceding field demodulation of multi-path demodulation module; R99 traffic data channel multipath parameter list is used to control the back field demodulation of multi-path demodulation module.Therefore field multi-path demodulation module is for example read the multipath parameter the multipath parameter list of E-DPDCH channel from the up-high speed traffic data channel and is carried out multi-path demodulation before, as Fig. 8 (b); Back field multi-path demodulation module is read the multipath parameter and is carried out multi-path demodulation from R99 traffic data channel multipath parameter list, shown in Fig. 8 (c).Thereby in a frame, finish the data channel demodulation of up miscellaneous service.
Claims (11)
1, a kind of mixing service RAKE receiving device of broadband CDMA system, comprise antenna data read-write control module, the antenna data memory, the antenna data cache module, the multi-path demodulation module, scrambler and channel code generation module, the customer parameter control module, control channel symbol data processing module, the TFCI decoding module, it is characterized in that, comprise that also the antenna data that links to each other with antenna data read-write control module quickens to read/replicated blocks, with the antenna data cache module, the multi-path demodulation module, the multipath parameter control module that scrambler and channel code generation module link to each other respectively, wherein:
Described antenna data quickens to read/replicated blocks, is used for producing antenna data acceleration/repeat control signal and comes control antenna data read-write control module to quicken to read or repeat to quicken to read the delay antenna data that is stored in the antenna data memory;
Described multipath parameter control module, be used to store the multipath parameter of different service types, according to the classification of the difference of business with uplink data channels respectively 2 transmission of respective antenna data issue the multipath parameter and control to the antenna data cache module antenna data is carried out buffer memory, issue the multipath parameter and control in the multi-path demodulation module demodulation speed, control scrambler jointly with the customer parameter control module and the channel code generation module produces scrambler and the channel code that corresponding multi-path demodulation module needs for control channel and data channel to the multi-path demodulation module;
Described antenna data cache module, the antenna data of direct input and the antenna data of time-delay storage post acceleration input are carried out buffer memory, antenna data for direct input, distribute to 1 memory cell of every multipath of control channel, the data of each cell stores m chip, for the antenna data of time-delay storage post acceleration input, distribute to 1 memory cell of every multipath of data channel, the data of each cell stores 2m chip.
2, mixing service RAKE receiving device as claimed in claim 1 is characterized in that:
Described antenna data quickens to read/and replicated blocks are when producing antenna data acceleration/repeat control signal, the time average of one frame is divided into 2 parts, the time that is every part is field, be divided into and quicken the processing time and repeat to quicken the processing time, control antenna data read-write control module quickens to read the up-high speed traffic data channel of the delay antenna data that is stored in the mixed service in the antenna data memory respectively, perhaps repeat to quicken to read the up R99 traffic data channel of the delay antenna data that is stored in the mixed service in the antenna data memory, control antenna data read-write control module to control channel in the time-delay antenna data adopt with the input aerial data mutually same rate read.
3, mixing service RAKE receiving device as claimed in claim 1 is characterized in that:
The multipath parameter that described multi-path demodulation module is sent here according to multipath parameter control module, control the corresponding scrambler and the channel code of scrambler and the generation of channel code generation module jointly by customer parameter control module and multipath parameter control module, the antenna data with time-delay to direct input carries out correlation demodulation, export working control channel data and data channel signal respectively, wherein, data channel for the time-delay antenna data carries out 2m chip antenna data and 2m chip scrambler with each timeticks, the correlation demodulation of channel code calculates, and carries out m chip antenna data and m chip scrambler for the control channel of time-delay antenna data with each timeticks, the correlation demodulation of channel code calculates.
4, mixing service RAKE receiving device as claimed in claim 3 is characterized in that:
Described antenna data memory is used to store the antenna data of time-delay;
Described antenna data read-write control module, be used for quickening according to antenna data reading/control of replicated blocks quickens to read or quicken to read the time-delay antenna data that the antenna data memory is stored, and the antenna data of input and time-delay antenna data are sent to described antenna data cache module carry out demodulation for the multi-path demodulation module;
Described control channel symbol data processing module is carried out channel estimating with the control channel data and high specific merges, and the TFCI symbol data that extracts in the control channel is delivered to the TFCI decoding module;
Described TFCI decoding module is deciphered the spreading factor SF that obtains the reality of data channel that should control channel according to the TFCI symbol data of input, and is delivered to the customer parameter control module;
Described customer parameter control module obtains the spreading factor SF of data channel reality, then the spreading factor SF information of reality is delivered to scrambler and the channel code generation module is used to produce scrambler and channel code is sent the multi-path demodulation module back to;
Described multi-path demodulation module, the data channel signal that calculates according to correlation demodulation, and the scrambler and the final dateout channel symbol of the channel code data that produce according to actual spreading factor SF.
5, mixing service RAKE receiving device as claimed in claim 3 is characterized in that:
The ratio of each memory cell data channel buffer memory number of chips and control channel buffer memory number of chips equals to quicken in the described antenna data read-write control module to read the ratio of speed with the speed that directly reads antenna data of data channel in the buffer memory time-delay antenna data in the described antenna data cache module;
The number of chips that described multi-path demodulation module is carried out demodulation to the data channel of time-delay antenna data at each timeticks and control channel carry out the ratio of the number of chips of demodulation, equal to quicken in the described antenna data read-write control module to read the ratio of speed with the speed that directly reads antenna data of data channel in the buffer memory time-delay antenna data.
6, the mixing service RAKE method of reseptance of the described receiving system of a kind of claim 1 is characterized in that, comprises the steps:
Step 1 quickens to read or to repeat the time-delay antenna data that quickens to read according to the multipath parameter, and the antenna data of time-delay antenna data and directly input is carried out buffer memory;
Step 2, antenna data and scrambler, channel code according to multipath parameter and corresponding multipath carry out multi-path demodulation to the antenna data of buffer memory, export working control channel data and data channel signal respectively, wherein the data channel in the time-delay antenna data is quickened demodulation;
Step 3, obtain the actual spreading factor of data channel signal according to the multi-path demodulation symbol of working control channel, carrying out channel estimating and high specific merges, extract the TFCI symbol in the control channel, the actual spreading factor SF that obtains the corresponding data channel after the decoding is used to produce scrambler and channel code, demodulates the data channel signal of final output.
7, mixing service RAKE method of reseptance as claimed in claim 6 is characterized in that:
In the step 1, described multipath comprises the multipath of up R99 traffic data channel of up-high speed traffic data channel, the data channel of control channel, data channel.
8, mixing service RAKE method of reseptance as claimed in claim 7 is characterized in that:
In the step 1, for the time-delay antenna data, one frame time is divided into the acceleration processing time and repeats to quicken processing time two fields, the up-high speed traffic data channel of data channel is repeating to quicken the up R99 traffic data channel that the processing time repeats to quicken data channel in the read latch antenna data in quickening processing time acceleration read latch antenna data.
9, mixing service RAKE method of reseptance as claimed in claim 6 is characterized in that:
In the step 1, when carrying out buffer memory, for the time-delay antenna data, distribute to 1 memory cell of every multipath of control channel, the data of each cell stores m chip are distributed to 1 memory cell of every multipath of data channel, the data of each cell stores 2m chip.
10, mixing service RAKE method of reseptance as claimed in claim 6 is characterized in that:
Separate timing in the step 2, calculate with the correlation demodulation that each timeticks carries out 2m chip antenna data and 2m chip scrambler, channel code according to corresponding multipath parameter for the data channel of time-delay antenna data, the dateout channel data, calculate output working control channel data and data channel signal for the control channel of time-delay antenna data with the correlation demodulation that each timeticks carries out m chip antenna data and m chip scrambler, channel code according to corresponding multipath parameter.
11, mixing service RAKE method of reseptance as claimed in claim 6 is characterized in that:
In the step 1, the ratio of the number of chips of each memory cell data channel buffer memory and the number of chips of control channel buffer memory equals to quicken the ratio of the speed of data channel in the read latch antenna data and the speed that directly reads antenna data when carrying out buffer memory;
In the step 2, the number of chips of the data channel of time-delay antenna data being carried out demodulation at each timeticks and control channel carry out the ratio of the number of chips of demodulation, equal to quicken the ratio of the speed of data channel in the read latch antenna data and the speed that directly reads antenna data.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710127573 CN101102123B (en) | 2007-07-03 | 2007-07-03 | Mixing service RAKE receiving device based on broadband CDMA system and its method |
| RU2010101709/09A RU2429573C1 (en) | 2007-07-03 | 2007-12-29 | Rake receiver and method of receiving with rake receiver mixed services based on code division multiple access broadband system |
| PCT/CN2007/003945 WO2009003336A1 (en) | 2007-07-03 | 2007-12-29 | An equipment and a method for rake receiving the mixed services based on wideband code division multiple access system |
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| CN 200710127573 CN101102123B (en) | 2007-07-03 | 2007-07-03 | Mixing service RAKE receiving device based on broadband CDMA system and its method |
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| CN101102123A true CN101102123A (en) | 2008-01-09 |
| CN101102123B CN101102123B (en) | 2010-04-21 |
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| Country | Link |
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| CN (1) | CN101102123B (en) |
| RU (1) | RU2429573C1 (en) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009003336A1 (en) * | 2007-07-03 | 2009-01-08 | Zte Corporation | An equipment and a method for rake receiving the mixed services based on wideband code division multiple access system |
| CN102487286A (en) * | 2010-12-01 | 2012-06-06 | 中兴通讯股份有限公司 | Method and device for processing data |
| CN101645733B (en) * | 2008-08-07 | 2013-01-16 | 中兴通讯股份有限公司 | Rake receiving device of hardware and receiving method thereof |
| CN103516391A (en) * | 2012-06-15 | 2014-01-15 | 中兴通讯股份有限公司 | Multipath detection method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100525155C (en) * | 2003-03-18 | 2009-08-05 | 华为技术有限公司 | Up demodulation method for different speed service |
| US7483474B2 (en) * | 2003-12-04 | 2009-01-27 | Nxp B.V. | Station comprising a rake receiver |
| CN100479340C (en) * | 2005-01-07 | 2009-04-15 | 华为技术有限公司 | Uplink baseband demodulating method and device for WCDMA base station |
| CN101102123B (en) * | 2007-07-03 | 2010-04-21 | 中兴通讯股份有限公司 | Mixing service RAKE receiving device based on broadband CDMA system and its method |
-
2007
- 2007-07-03 CN CN 200710127573 patent/CN101102123B/en active Active
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009003336A1 (en) * | 2007-07-03 | 2009-01-08 | Zte Corporation | An equipment and a method for rake receiving the mixed services based on wideband code division multiple access system |
| CN101645733B (en) * | 2008-08-07 | 2013-01-16 | 中兴通讯股份有限公司 | Rake receiving device of hardware and receiving method thereof |
| CN102487286A (en) * | 2010-12-01 | 2012-06-06 | 中兴通讯股份有限公司 | Method and device for processing data |
| CN102487286B (en) * | 2010-12-01 | 2014-08-13 | 中兴通讯股份有限公司 | Method and device for processing data |
| CN103516391A (en) * | 2012-06-15 | 2014-01-15 | 中兴通讯股份有限公司 | Multipath detection method and apparatus |
| CN103516391B (en) * | 2012-06-15 | 2017-03-29 | 中兴通讯股份有限公司 | Multi-path detecting method and device |
Also Published As
| Publication number | Publication date |
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| RU2429573C1 (en) | 2011-09-20 |
| CN101102123B (en) | 2010-04-21 |
| WO2009003336A1 (en) | 2009-01-08 |
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