CN102104558B - Layer1 baseband processing method and device thereof - Google Patents
Layer1 baseband processing method and device thereof Download PDFInfo
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- CN102104558B CN102104558B CN200910200419.0A CN200910200419A CN102104558B CN 102104558 B CN102104558 B CN 102104558B CN 200910200419 A CN200910200419 A CN 200910200419A CN 102104558 B CN102104558 B CN 102104558B
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Abstract
The present invention discloses a layer1 baseband processing method and a device, wherein the method comprises the steps of: performing resource inverse transformation on a signal subjected to fast Fourier transformation with every antenna every symbol as one unit, performing channel estimation on pilot symbols subjected to the resource inverse transformation with every antenna every pilot symbol as one unit, performing equalization on data related to one user every time, wherein the data related to one unit comprises data symbols subjected to the resource inverse transformation and pilot symbols used for channel estimation; performing bit-level processing on the equalized data related to one user every time, wherein each level operation sends data to next level operation with a data volume processed by the next level operation every time as the unit. The technical scheme provided by the invention can reduce processing time-delay of each processor in a multiprocessor baseband processing system, and then reduces the processing time-delay of the whole baseband processing system.
Description
Technical field
Embodiments of the present invention are broadly directed to Base-Band Processing field, more specifically, relate to layer 1 baseband processing method and equipment thereof.
Background technology
Main following two kinds of LTE band processing system solution at present: 1) adopt the many kernels of single-chip.The large heat radiation difficulty of this scheme chip power-consumption, and be limited to chip processing speed, performance is difficult to improve.2) adopt multiprocessor, between processor, adopt high-speed bus to carry out alternately.Because Long Term Evolution (LTE) needs very high up-downgoing throughput, and many antennas, cause the data interaction amount between processor very large, transmission delay is very large, makes the disposal ability of whole baseband system be difficult to improve.
Wherein first scheme is the focus of LTE band processing system.Taking a common LTE Base-Band Processing as example, the operand of fast Fourier transform (FFT), channel estimating (Channel Estimation), balanced (Equlization) is all very large, in the time that multiprocessor is realized, these processing need to realize on different processors, and the result of previous step is transferred to another processor by bus from a processor and carries out next step processing.And because the high bandwidth of LTE, many antennas, high-throughput cause in the time transmitting, processing delay can be very obvious, the time delay that causes whole L1 (layer 1) to process is difficult to meet system requirements.
Therefore, need a kind of L1 Base-Band Processing scheme to meet the delay requirement of LTE system.
Summary of the invention
Embodiments of the present invention disclose a kind of layer 1 baseband processing method and equipment thereof, to address the above problem.
According to an aspect of the present invention, a kind of layer 1 baseband processing method disclosed.Signal after the method comprises taking the every OFDM symbol of every antenna as a unit fast Fourier transform carries out resource inverse mapping; Often lead symbol taking every antenna and the symbol of leading carrying out after resource inverse mapping is carried out to channel estimating as a unit; At every turn the data relevant with user are carried out to equilibrium, wherein, the data relevant with user comprise the data symbol that carried out after resource inverse mapping and the symbol of leading for channel estimating; At every turn the data relevant with user after equilibrium are carried out to bit-level processing, wherein, every one-level operation operate transmission data taking the each data volume of processing of next stage operation as unit to next stage.
According to a further aspect in the invention, disclose a kind of layer 1 base band processing device, having comprised: resource inverse mapping unit, for taking the every orthogonal multiplex symbol of every antenna as a unit, the signal after to fast Fourier transform carries out resource inverse mapping; Channel estimating unit, carries out channel estimating to the symbol of leading carrying out after resource inverse mapping for often lead symbol taking every antenna as a unit; Balanced unit, at every turn the data relevant with user being carried out to equilibrium, wherein, the data relevant with user comprise that resource inverse mapping unit carries out data symbol after resource inverse mapping and the channel estimating unit symbol of leading for channel estimating; Bit-level processing unit, at every turn the data relevant with user after equilibrium being carried out to bit-level processing, wherein, taking next unit, each data volume of processing sends data to next unit as unit in each unit.
By technique scheme, can reduce the processing time delay of each processor in multiprocessor band processing system, and and then reduce the processing time delay of whole band processing system.
Brief description of the drawings
By reference to the accompanying drawings embodiments of the present invention are described in detail, can understand better the present invention, wherein:
Fig. 1 shows according to the block diagram of the base band processing device of embodiment of the present invention;
Fig. 2 shows according to the flow chart of the baseband processing method of embodiment of the present invention;
Fig. 3 shows according to embodiment of the present invention, and resource inverse mapping unit is to the schematic diagram receiving from the data of FFT unit;
Fig. 4 shows according to embodiment of the present invention, and channel estimating unit is to the schematic diagram receiving from the data of resource inverse mapping unit;
Fig. 5 shows according to embodiment of the present invention, and balanced unit is to the schematic diagram receiving from the data of channel estimating unit;
Fig. 6 shows according to embodiment of the present invention, and bit-level processing unit unit is to the schematic diagram receiving from the data of balanced unit.
Embodiment
To a preferred embodiment of the present invention will be described in detail, in description process, having omitted is unnecessary details and function for the present invention with reference to the accompanying drawings, obscures to prevent that the understanding of the present invention from causing.
Embodiments of the present invention have proposed layer 1 base band processing device, as shown in Figure 1, this device at least comprises: resource inverse mapping unit 120, for an antenna symbol is carried out to resource inverse mapping, and sends an of antenna at every turn and lead symbol (pilot symbol).Channel estimating unit 130, carries out Signal estimation according to the symbol of leading of receive antenna, and each transmission and the data that user is relevant.Balanced unit 140, each equilibrium and the data that user is relevant, and each transmission and the data that user is relevant after treatment, wherein, data that should be relevant with user comprise resource inverse mapping unit 120 data symbols after treatment and channel estimating unit 130 symbol of leading for channel estimating.Bit stream processing unit 150, for each that process that balanced unit sends and the data that user is relevant, and sends data after treatment and processes to carry out follow-up layer 2 (L2).
This device also comprises FFT unit 110, for wireless front end signal after treatment is carried out to fast Fourier transform, and each symbol that sends an antenna to resource inverse mapping unit 120.
Above-mentioned data symbol is OFDM (OFDM) data symbol, and leading symbol is that OFDM leads symbol.
In above each unit, also can comprise input into/output from cache (not shown), to carry out buffer memory to receiving the data that maybe will send.
Although above with separate functional module formal description the base band processing device of the embodiment of the present invention, but each assembly shown in Fig. 1 can be realized with multiple devices in actual applications, and the multiple assemblies that illustrate also can be integrated in chip piece or an equipment in actual applications.This base band processing device also can comprise any unit and the device for other object.
The flow chart that refers now to Fig. 2 is described in detail layer 1 base band processing device shown in Fig. 1.
In step 210, FFT unit 110 is for carrying out fast Fourier transform to wireless front end signal after treatment.Its concrete steps have been conventionally known to one of skill in the art, do not repeat them here.
FFT unit sends with the form of an OFDM symbol of every next antenna the signal after conversion to resource inverse mapping unit 120.Fig. 3 shows the schematic diagram of transmission, sends as seen taking the every symbol of every antenna as a unit.
In step 220, resource inverse mapping unit 120 carries out resource inverse mapping taking the every symbol of every antenna as a unit to signal.And as shown in Figure 4, often lead symbol taking every antenna and send and lead symbol as a unit to channel estimating unit, in this example, for OFDM leads symbol.Meanwhile, resource inverse mapping unit 120 also sends to balanced unit 140 by the data symbol relevant with user at every turn.
In step 230, leading symbol data to one of an antenna carries out channel estimation process at every turn for channel estimating unit 130, and as shown in Figure 5, data after treatment is sent to balanced unit 140 taking relevant with user symbol of leading as a unit at every turn.
In step 240, balanced unit 140 carries out equalization operation to the data relevant with user at every turn, and as shown in Figure 6, the data after equilibrium is sent to bit-level processing unit 150 taking the data relevant with user as a unit at every turn.In this step, the data relevant with user comprise the symbol of leading that data symbol that resource inverse mapping unit 120 sends and channel estimating unit 130 send.
In step 250, bit-level processing unit 150 carries out the bit-level processing of L1 to the data after equilibrium, and result is sent to subsequent module (not shown) and carries out more high-rise processing, as L220 (layer 2) processes.After balanced unit 140, be all to carry out as a unit taking the data relevant with user to the processing of data.
By above technical scheme, a part of transfer of data of upper level result is processed to next stage at every turn, and in next stage processing, carry out the transmission of the next part data of upper level result, thereby make the whole Base-Band Processing can flowing water, reduce the average treatment time delay of each processor in multiprocessor scheme, thereby greatly reduced the processing delay of whole band processing system.
Those skilled in the art should be easy to recognize, can realize by programmed computer the different step of said method.At this, some execution modes comprise equally machine readable or computer-readable program storage device (as, digital data storage medium) and coding machine can carry out or the executable program command of computer, wherein, some or all steps of said method are carried out in this instruction.For example, program storage device can be digital storage, magnetic storage medium (as Disk and tape), hardware or the readable digital data storage medium of light.Execution mode comprises the programmed computer of the described step of carrying out said method equally.
Description and accompanying drawing only illustrate principle of the present invention.Therefore should be appreciated that those skilled in the art can advise different structures, although these different structures clearly do not describe herein or illustrate, within having embodied principle of the present invention and being included in its spirit and scope.In addition, all examples of herein mentioning are the main only design with help reader understanding's principle of the present invention and promotion this area that inventor was contributed for teaching purpose clearly, and should be interpreted as not being the restriction to these specific examples of mentioning and condition.In addition, all statement and specific examples thereof of mentioning principle of the present invention, aspect and execution mode comprise its equivalent interior herein.
Description is above only for realizing embodiments of the present invention; it should be appreciated by those skilled in the art; the any modification or partial replacement not departing from the scope of the present invention; all should belong to the scope that claim of the present invention limits; therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (6)
1. layer 1 baseband processing method, comprising:
Signal taking the every OFDM symbol of every antenna as a unit after to fast Fourier transform carries out resource inverse mapping;
Often lead symbol taking every antenna and the symbol of leading carrying out after resource inverse mapping is carried out to channel estimating as a unit;
At every turn the data relevant with user are carried out to equilibrium, the wherein said data relevant with user comprise the data symbol that carried out after resource inverse mapping and the symbol of leading for channel estimating;
At every turn the relevant data of described and user after equilibrium are carried out to bit-level processing,
Wherein every one-level operation sends data taking the each data volume of processing of next stage operation as unit to described next stage operation.
2. method according to claim 1, also comprises:
Wireless front end signal after treatment is carried out to fast Fourier transform.
3. method according to claim 1, wherein said data symbol is orthogonal frequency division multiplexing data symbols, described in to lead symbol be that OFDM is led symbol.
4. layer 1 base band processing device, comprising:
Resource inverse mapping unit, for taking the every OFDM symbol of every antenna as a unit, the signal after to fast Fourier transform carries out resource inverse mapping;
Channel estimating unit, carries out channel estimating to the symbol of leading carrying out after resource inverse mapping for often lead symbol taking every antenna as a unit;
Balanced unit, at every turn the data relevant with user being carried out to equilibrium, the wherein said data relevant with user comprise that resource inverse mapping unit carries out data symbol after resource inverse mapping and the channel estimating unit symbol of leading for channel estimating;
Bit-level processing unit, at every turn the relevant data of described and user after equilibrium being carried out to bit-level processing,
Wherein the data volume of each unit each processing taking next unit is as unit is to described next unit transmission data.
5. device according to claim 4, also comprises:
Fast Fourier transform unit, for carrying out fast Fourier transform to wireless front end signal after treatment.
6. device according to claim 4, wherein said data symbol is orthogonal frequency division multiplexing data symbols, described in to lead symbol be that OFDM is led symbol.
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| CN101578834A (en) * | 2006-11-01 | 2009-11-11 | 株式会社Ntt都科摩 | User terminal device and base station device |
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| CN101305522A (en) * | 2006-04-28 | 2008-11-12 | 三菱电机研究实验室 | Method and system for processing reference signal using transmission time interval packet |
| CN101578834A (en) * | 2006-11-01 | 2009-11-11 | 株式会社Ntt都科摩 | User terminal device and base station device |
| CN101222459A (en) * | 2007-01-12 | 2008-07-16 | 展讯通信（上海）有限公司 | Pilot frequency insertion and channel estimation method of frequency domain equalization system |
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