CN104579580B - The method and device of data flow is sent in a kind of mimo system - Google Patents
The method and device of data flow is sent in a kind of mimo system Download PDFInfo
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- CN104579580B CN104579580B CN201510054071.4A CN201510054071A CN104579580B CN 104579580 B CN104579580 B CN 104579580B CN 201510054071 A CN201510054071 A CN 201510054071A CN 104579580 B CN104579580 B CN 104579580B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0612—Space-time modulation
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Abstract
The invention discloses the method and devices that data flow is sent in a kind of mimo system；After sending the modulation mapping step of data flow method in existing mimo system, before emitting pre-treatment step, addition caching, binding inverible transform and interleaving steps include the following steps：Caching step, each circuit-switched data stream after mapping modulation cache, and obtain each circuit-switched data block, data block refers to the vector for including N number of element；Bind inverible transform step：Binding inverible transform is carried out respectively to the obtained each circuit-switched data block of caching, the energy of each modulation symbol is made to be diffused into two of entire time domain to N number of point, improves the utilization rate of time domain dimension；Interleaving treatment step ensures same time slot, the component for the data flow that every antenna transmission is not gone the same way, the utilization rate of raising spatial domain dimension.By way of increasing time domain dimension and spatial domain dimension, solve the problems, such as in the prior art to the dimensions of MIMO signals of communication using insufficient, so as to obtain big dimensional effect.
Description
Technical field
The present invention relates to the method and devices that data flow is sent in wireless communication more particularly to a kind of mimo system.
Background technology
MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output) system, in transmitting terminal and reception
End configures more antennas, by by the data flow of more antennas carry out it is parallel send and receive, utilize the nothing of rich multipath
In line communication environments between different antennae channel uncorrelated characteristic, higher channel capacity is obtained, so as to improve mimo system
The availability of frequency spectrum.At present, MIMO technology has become one of key technology of wireless communication field, quick by recent years
Development, is increasingly being applied to various wireless communication systems.
In MIMO communication system, traditionally the signal of transmitting antenna transmitting be referred to as data flow all the way, logical in document
Frequently referred to one layer；The transmitting signal of different transmitting antennas corresponds to different circuit-switched data streams, and the signal that i-th transmitting antenna is sent is known as
I-th circuit-switched data stream.
In channel matrix full rank and NT≤NRIn the case of, mimo system can transmit NTCircuit-switched data stream (DS, Data
Stream), and the present invention sending method be that data block (DB, Data Block) is handled.Wherein, NTAnd NRRespectively
Transmitting antenna number and reception antenna number, data block are as obtained by every circuit-switched data stream caches piecemeal；In the present invention, data block refers to
Vector comprising N number of component or modulation symbol can represent with the dimensional vector of a N × 1, wherein, N >=2.
When mimo system carries out data transmission, the dimension for the MIMO signals of communication that data sending terminal is generated is to data receiver
Detection performance when end carries out MIMO signal detection has certain influence.Specifically, working as letter is carried out using some detection methods
Number detection when, the dimension for the MIMO signals of communication that data sending terminal is generated is bigger, data receiver carry out MIMO signal inspection
Detection performance during survey is better, and this phenomenon is known as big dimension phenomenon or big dimensional effect (Large in the literature
Dimensional Effect,Large System Behavior)。
The dimension of MIMO signals of communication refers to the complete modulation after a modulated mapping of mimo system transmitting terminal
The points of time domain, frequency domain or spatial domain signal that symbol is influenced in receiving terminal；For example, transmitting terminal passes through a transmitting antenna institute
The modulation symbol sent, the N of receiving terminalRRoot reception antenna can receive the modulation symbol, then the modulation symbol institute
The points in the spatial domain influenced are NR, i.e. at this point, the spatial domain dimension of the modulation symbol is NR.In narrow-band MIMO system, MIMO leads to
The dimension for believing signal is NR, wherein, spatial domain dimension is NR, time domain dimension is 1.
When being carried out data transmission using above-mentioned technology, narrow-band MIMO system, which utilizes the dimension of MIMO signals of communication, not to be filled
Point.The needs that narrow-band MIMO system sends data flow method are improved it can be seen that existing in the prior art.It is described in the present invention
Mimo system refers to narrow-band MIMO system in the case where being not added with specified otherwise.
The content of the invention
The purpose of the present invention is exactly to solve the above problems, and provides the method and dress that data flow is sent in a kind of mimo system
It puts, to solve to utilize the technical issues of insufficient to the dimension of MIMO signals of communication in the prior art.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of method that data flow is sent in mimo system sends the tune of the method for data flow in existing mimo system
After mapping step processed, before emitting pre-treatment step, addition caching, binding inverible transform and interleaving treatment step, including such as
Lower step：
Caching step：Each circuit-switched data stream after modulation mapping pre-treatment and modulation mapping is cached respectively, is obtained each
Circuit-switched data block, wherein, each data block includes N number of modulation symbol；
Bind inverible transform step：Each circuit-switched data block obtained to caching carries out binding inverible transform respectively, makes each
The energy of modulation symbol has all been diffused into two of entire time domain to N number of point, improves the utilization rate of time domain dimension；Wherein,
It binds each data block after inverible transform and includes N number of component；
Interleaving treatment step：The data block handled binding inverible transform is interleaved processing；By making any one
A data block is emitted by the antenna of two and two or more, is modulated so as to fulfill each before binding inverible transform is complete
Symbol can be emitted by the antenna of two and two or more, so that spatial domain dimension is more than or equal to reception antenna number NR, carry
The utilization rate of high spatial domain dimension；Increase the dimension of MIMO signals of communication by way of increasing time domain dimension and spatial domain dimension
Add, so as to obtain big dimensional effect.
The binding inverible transform includes but not limited in discrete Fourier transform, discrete cosine transform or Walsh conversion
One kind or any number of combination, the binding inverible transform is the inverible transform for having binding effect, and the binding acts on, and refers to
Vectorial two that any one component in vector before binding can all influence to obtain after conversion arrive N number of component, before binding
The energy of any one component of vector has been diffused into vectorial two after binding by conversion to N number of component.
The binding inverible transform makes the energy of binding inverible transform before processing data each modulation symbol in the block
It has been diffused on more than two points of entire time domain so that data each component in the block after binding inverible transform is with becoming
Two in the block of data have correlation to N number of modulation symbol before changing, and realize the binding of data block, improve the utilization of time domain dimension
Rate.It should be noted that every inverible transform with the binding effect can be used as the binding inverible transform of the present invention.
The purpose of the interleaving treatment is to ensure same time slot, the component for the data flow that every antenna transmission is not gone the same way, institute
Interleaving treatment step is stated including piecemeal to interweave.
The interleaving treatment can be through but not limited to the N number of component made in the data block after binding inverible transform by two
Root and the transmitting of the antenna of two or more so that each complete modulation symbol after data sending terminal modulation mapping passes through two
And the antenna of two or more emits, and realizes and interweaves.It should be noted that every ensure same time slot, every antenna sends different
The interleaving mode of the component of the data flow on road can be used as the intertexture of the present invention.
The forwarding step uses narrow-band MIMO system, and the communication data sent is multichannel data, i.e. NT>=2,
In, NTFor transmitting antenna number.
The device of data flow is sent in a kind of mimo system, the tune of the method for data flow is sent in existing mimo system
After mapping block processed, before emitting pre-processing module, addition cache module, binding inverible transform module and interleaving treatment mould
Block, including following module：
Cache module：Each circuit-switched data stream after modulation mapping pre-treatment and modulation mapping is cached, obtains each way
According to block, wherein, each data block includes N number of modulation symbol；
Bind inverible transform module：Each circuit-switched data block obtained to caching carries out binding inverible transform respectively, makes each
The energy of modulation symbol has all been diffused into two of entire time domain to N number of point, improves the utilization rate of time domain dimension, realizes
The binding of data block；Wherein, bind each data block after inverible transform and include N number of component；
Interleaving treatment module：The data block handled binding inverible transform is interleaved processing；By making any one
A data block is emitted by the antenna of two and two or more, is modulated so as to fulfill each before binding inverible transform is complete
Symbol can be emitted by the antenna of two and two or more, so that spatial domain dimension is more than or equal to reception antenna number NR, carry
The utilization rate of high spatial domain dimension；Increase the dimension of MIMO signals of communication by way of increasing time domain dimension and spatial domain dimension
Add, so as to obtain big dimensional effect.
It is described binding inverible transform module include but not limited to discrete Fourier transform module, discrete cosine transform module or
One kind or any number of combination in Walsh conversion modules, the binding inverible transform module is the possibility of reversal for having binding effect
Block is changed the mold, the binding effect, the vector obtained after conversion can all be influenced by referring to any one component of the vector before binding
Two are arrived N number of component, and the energy of any one component of the vector before binding has been diffused into the vector after binding by conversion
Two on N number of component.
The binding inverible transform module, is diffused into the energy of each modulation symbol before binding inverible transform
On two of entire time domain and more than two points so that data each components in the block and conversion after binding inverible transform
Preceding two in the block of data have correlation to N number of modulation symbol, realize the binding of data block, improve the utilization of time domain dimension
Rate.
The interleaving treatment module is to ensure same time slot, the component for the data flow that every antenna transmission is not gone the same way, described
Interleaving treatment module includes piecemeal interleaving block.
The interleaving treatment module can be through but not limited to leading to N number of component in the data block after binding inverible transform
Cross the antenna transmitting of two and two or more so that each complete modulation symbol after data sending terminal modulation mapping passes through
The antenna transmitting of two and two or more.
The interleaving treatment module needs to ensure same time slot, the component for the data flow that every antenna transmission is not gone the same way.
The sending module uses narrow-band MIMO system, and the communication data sent is multichannel data, i.e. NT>=2,
In, NTFor transmitting antenna number.
Main idea is that：By using binding inverible transform and interleaving treatment technology, improve in mimo system
Time domain dimension and spatial domain dimension utilization rate, make the dimension of MIMO signals of communication increase, i.e. so that mimo system transmitting terminal
Complete modulation symbol after one modulated mapping counts the time domain influenced letter in the signal that receiving terminal is influenced
Number and spatial domain signal points product, and then obtain big dimensional effect, data receiver further made to utilize some detection sides
Detection performance when method carries out MIMO signal detection is significantly improved.
Advantageous effect of the present invention：
1. in this application, will modulate the data flow of mapping pre-treatment and modulation mapping treated each road antenna respectively into
Row caching obtains including the data block of N number of modulation symbol, by carrying out binding inverible transform respectively to each data block, so that
The energy of each modulation symbol has been diffused into two of entire time domain to N number of point, it is possible to when effectively improving
The utilization rate of domain dimension.
2. moreover, by being interleaved processing to the data block after binding inverible transform, by the energy of entire data block point
It is fitted on the antenna of two and two or more so that each complete modulation symbol before binding inverible transform can pass through two
Root and the transmitting of the antenna of two or more so that spatial domain dimension is more than or equal to reception antenna number NR, it is possible to effectively improve sky
The utilization rate of domain dimension.
3. the present invention increases the dimension of MIMO signals of communication by way of increasing time domain dimension and spatial domain dimension,
In, maximal dimension can reach NNRNT, big dimensional effect can be obtained, data receiver can be effectively improved and carrying out MIMO letters
Number detection when detection performance.
4. due in the application, carrying out binding inverible transform and interleaving treatment, may be employed software mode realize or
It is that can be realized by the hardware device for being equipped with a small amount of, it is possible to effectively cost-effective.
Description of the drawings
The general schematic flow diagram of the method for data flow is sent in the existing mimo system that Fig. 1 is to provide.
Fig. 2 is the general exemplary flow for the method that data flow is sent in a kind of mimo system according to embodiments of the present invention
Figure.
Fig. 3 is the schematic diagram for the device that data flow is sent in a kind of mimo system according to embodiments of the present invention.
Specific embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
In the description of specific examples below, different terms represents the same or similar meaning, is intended merely to adapt to
Different expression mode used by different specific linguistic context.Such as constellation point and modulation mapping are with the same or similar
Meaning.In addition, disclosed method is suitable for any NTThe narrow-band MIMO system of >=2 antenna numbers.
Following transmission and processing process is not limited solely to the process shown in method schematic flow diagram, other are not having
The processing method under the premise of creative work is made, belongs to the scope of protection of the invention.
As shown in Figure 1, describe the general schematic flow diagram for a kind of method that data flow is sent in existing mimo system.
This method includes following operating process：
In T11, to data flow DS-1, DS-2 ..., DS-NTCarry out channel coding.Wherein, all NTCircuit-switched data stream uses one
A channel encoder coding, i.e., after being encoded using a channel encoder, be separated into NTCircuit-switched data stream；It can also be per all the way or several
Road is encoded using a channel encoder, and in this case, multiplex (MUX) encoder can be the same or different.
In T12, to NTCircuit-switched data stream is modulated mapping, by NTThe information bit of each circuit-switched data stream in circuit-switched data stream
It is mapped to according to used modulation mapping mode in planisphere corresponding points, multiplex data stream may be employed and identical can also adopt
With different modulation mapping modes.Wherein, in mimo systems, generally using QAM (Quadrature Amplitude
Modulation), MPSK (M-ary Phase Shift Keying) etc. modulates mapping techniques or is constellation point technology.
In T13, respectively to treated data flow DS-1, DS-2 ..., DB-NTCarry out transmitting pre-treatment, Ran Houtong
It crosses corresponding antenna and sends each circuit-switched data stream.Wherein, emitting pre-treatment can include at radio frequency, IF Modulation, amplification and base band
The processes such as reason.
In order to substantially effectively utilize the dimension of MIMO signals of communication, the present invention provides a kind of side for sending data flow
Method, this method are on the basis of the method for existing mimo system transmission data flow, are with the addition of at binding inverible transform and intertexture
Reason process, and existing system is handled for data flow, and method of the invention is needed to data block processing, it is necessary to right
Each circuit-switched data stream in Fig. 1 after modulation mapping is cached, and is several data blocks by each circuit-switched data flow point, wherein, the present invention
In, the data block refers to the vector comprising N number of modulation symbol or component.The method of the present invention, specific implementation as shown in Fig. 2,
Unlike Fig. 1 following processing procedure is added after processing and modulation mapping processing before step T21 modulation mappings：It caches, tie up
Determine inverible transform, interleaving treatment, specific implementation step of the invention is as described below：
In the embodiment, NT>=2, N >=2, wherein, NTIt is transmitting antenna number, N represents the element that each data block is included
Number.
In T21, to NTCircuit-switched data stream is modulated mapping pre-treatment and modulation mapping processing, with conventional mimo system number
It is similar according to sending, the N obtained by mapping pre-treatment will be modulatedTThe information bit of each circuit-switched data stream in circuit-switched data stream is according to being adopted
Modulation mapping mode is mapped in planisphere corresponding points, multiplex data stream may be employed it is identical can also use it is different
Modulate mapping mode.Wherein, modulation mapping pre-treatment can including channel coding etc. processes.
In T22, each circuit-switched data stream of above-mentioned gained is cached respectively, obtains the corresponding data block DB- of each circuit-switched data stream
1, DB-2 ..., DB-NT, wherein, each data block includes N number of modulation symbol.
In T23, carry out binding inverible transform processing respectively to the data block of above-mentioned gained, realize the binding of data block, have
Body, it can be realized by such as discrete Fourier transform, discrete cosine transform or Walsh conversion one kind or any number of combination.
Wherein, bind each data block after inverible transform and include N number of component.
In T24, processing is interleaved to the data block after above-mentioned binding, it is necessary to ensure same time slot, every transmission antenna
Send the component of different circuit-switched data streams.
In T25, respectively to treated data flow DS-1, DS-2 ..., DB-NTCarry out transmitting pre-treatment, Ran Houtong
It crosses corresponding antenna and sends each circuit-switched data stream.This step, it is similar with conventional mimo system data sending, wherein, place before emitting
Reason can include the processes such as radio frequency, IF Modulation, amplification and Base-Band Processing.
The specific descriptions that T23 steps in the present embodiment realize process are provided below.
Binding inverible transform in the present invention refers to the inverible transform with binding effect, can be expressed as b=T (a),
In, b=(b1,…,bN)T, a=(a1,…,aN)T, the vector with same dimension N, wherein, vectorial a is bound in T (a) expressions
Inverible transform；The binding effect refers to any one component a of the vectorial a before bindingi, i=1,2 ..., N can influence to become
Two of the vectorial b obtained after changing arrive N number of component, i.e. the energy of any one component of a has been diffused into vectorial b's by conversion
Two on N number of component.In the present embodiment, binding inverible transform is carried out to the data block of caching gained so that binding possibility of reversal
Change data each component in the block after binding has correlation, tool for two in the block with data before conversion to N number of modulation symbol
Body, realization can be brought by the possibility of reversals such as such as discrete Fourier transform, discrete cosine transform or Walsh conversion.
The specific descriptions that T24 steps in the present embodiment realize process are provided below.
Interleaving treatment in the application, it is therefore an objective to ensure same time slot, every antenna sends the component of different circuit-switched data streams,
It can specifically be realized by piecemeal intertexture.In the present invention, by handing over the data block after binding inverible transform binding
Knit processing so that N number of component in the data block after binding is emitted by the antenna of two and two or more so that transmitting terminal tune
Each complete modulation symbol after system mapping is emitted by the antenna of two and two or more.
Discrete Fourier transform, discrete cosine transform, Walsh conversion conversion involved by transmitter of the present invention, transmitting terminal
Their inverse transformation can be used, inverse discrete Fourier transform, inverse discrete cosine transform, anti-Walsh changes bring realization, as long as
Receiving terminal is changed accordingly, can obtain identical technique effect.
A kind of specific implementation of T23, T24 step in the present embodiment is provided below.
In the present embodiment, binding inverible transform is using discrete Fourier transform, as to each circuit-switched data block obtained by caching
Discrete Fourier transform is carried out respectively, and the energy of any one modulation symbol in data block before binding inverible transform is diffused into
On N number of point of time domain, time domain dimension is N；Interleaving mode uses piecemeal interleaving mode, will bind the data after inverible transform is bound
Block passes through NTRoot antenna transmission, the energy of the data block after will binding are evenly distributed to NTOn root antenna, binding possibility of reversal is realized
Each complete modulation symbol before changing passes through NTRoot antenna emits, and spatial domain dimension is NTNR.In the embodiment, MIMO communications
The dimension of signal is NNTNR, wherein, NTAnd NRTransmitting antenna number and reception antenna number are represented respectively, an element that data block includes
Number N=c × NT, when c >=1, c represent that data block piecemeal interweaves, the number for the element that each sub-block is included.
Concrete implementation step：It is starting, is makingBefore representing modulation mapping
Gained sending metrix to be sent after processing and modulation mapping processing and caching, wherein, row vector is expressed as a data block, i.e.,
Data block xi=(xi,1,…,xi,k,…xi,N) represent modulation mapping pre-treatment and modulation mapping processing after i-th antenna it is N number of when
Modulation symbol to be sent, i=1,2 ..., N in gapT, k=1,2 ..., N, ()TThe transposition of representing matrix or vector.
First, to data block xi=(xi,1,…,xi,N), i=1 ..., NT, discrete Fourier transform is carried out respectively, i.e. yi
=DFT (xi), i=1 ..., NT, DFT (xi) represent to vector xiDo discrete Fourier transform；To the data block after above-mentioned conversion
Piecemeal interleaving treatment is carried out, by by each data block yiIt is further divided into NTA sub-block, each sub-block include c points
Amount, i.e. the corresponding c time slot of every antenna component to be sent is defined as a sub-block, for example, data block
K-th of sub-block corresponds to (k-1) × c+1:Signal component in k × c time slot, such as i-th of data block, k-th of subdata
Block is expressed as Ai,k=(yi,(k-1)×c+1,…,yi,k×c)。
A kind of realization method that piecemeal interweaves：Using sub-block as a processing unit, subdata block carries out cyclic shift,
Such as (k-1) × c+1:The corresponding sub-block of each antenna in k × c timesTo matrix Ak
In each row vector (sub-block) cycle move down k-1, k=1 ..., NTPosition, becomes
Emitted by corresponding antenna, it can be seen that after above-mentioned processing, the component of k-th of sub-block of k-th of data block before intertexture
It will be sent by first antenna, the component of k-th of sub-block of -1 data block of kth will pass through N before intertextureTRoot
Antenna is sent.Specifically, with first data block y before intertexture1=(y1,1,…y1,k,…y1,N) exemplified by, before interleaving treatment
Component included in data block is emitted by first antenna, after above-mentioned interleaving treatment, will pass through NTRoot antenna is sent out
It goes, wherein, the 1st each component of sub-block is emitted by the 1st antenna, and the 2nd sub-block will pass through NTRoot antenna is sent out
It penetrates, the 3rd sub-block will pass through NT- 1 antenna transmitting, and so on, NTA sub-block will pass through the 2nd antenna
Transmitting.The interleaving treatment of the present embodiment makes the segment of each data block before every transmitting antenna transmitting intertexture, i.e. each data
The energy of block is evenly distributed to NTOn root transmitting antenna.
In the present embodiment, binding inverible transform is handled for data block (row vector), and it is each that treated
Data block includes N number of component that is mutually related.Discrete Fourier transform in the present embodiment is only exemplary, every satisfaction energy
The inverible transform method of enough binding data block functions is equally applicable to the present invention.In addition, the piecemeal in the present embodiment interweaves also only
It is exemplary, the interleaving mode of every component that disclosure satisfy that same every antenna of time slot and send different circuit-switched data streams is equally suitable
For the present invention, other processing methods without making creative work belong to the scope of protection of the invention.
It should be further noted that above-mentioned binding inverible transform and interleaving treatment are only exemplary, it is various aobvious and easy
The modification seen should be also included within the scope of the present invention.
Fig. 3 shows the schematic diagram for the device 300 for sending data flow in mimo systems according to embodiments of the present invention.The dress
Putting 300 includes modulation mapping pre-treatment and modulation mapping block 310, cache module 320, binds inverible transform module 330, interweaves
Module 340 sends pre-processing module 350 and sending module 360.
Modulation mapping pre-treatment and modulation mapping block 310 complete modulation mapping pre-treatment, and will treated NTWay
It is mapped to according to the information bit in stream according to used modulation mapping mode in planisphere corresponding points；
Cache module 320 caches to obtain NTThe corresponding data block of circuit-switched data stream；
Inverible transform module 330 is bound, realizes the binding of data block；
Interleaving block 340 emits the data block after binding inverible transform by the antenna of two and two or more；
Send pre-processing module 350, transmission pre-treatment is carried out to each data block after above-mentioned resume module, including radio frequency,
The processes such as IF Modulation, amplification and Base-Band Processing；
Sending module 360 sends each circuit-switched data stream after above-mentioned resume module.
It should be further noted that binding inverible transform module 330 completes the binding of data block and establishes correlation, it can
To include one kind in discrete Fourier transform module, discrete cosine transform module or Walsh conversion modules or any number of combination.
Interleaving block 340, including piecemeal interleaving block, it is therefore an objective to ensure same time slot, every transmitting antenna sends different
The component of the data flow on road.
When realizing the embodiment of the present invention, simply to illustrate that convenience simply just give main work(in figure 3
Energy module increases the embodiment of other processing modules without making creative work, belongs to what the present invention protected
Scope.
For convenience and simplicity of description, the specific work process of the device described in Fig. 3 and its comprising modules, may be referred to
Corresponding process in preceding method embodiment, details are not described herein.
In the embodiment proposed in the application, it should be appreciated that disclosed method and apparatus can be in other way
It realizes.For example, what device described above was merely exemplary, for example, the division of the module is only a kind of logic work(
It can divide, can there is other dividing mode in actual implementation.
Binding inverible transform module and interleaving block in each embodiment of the present invention can include multiple processing units,
It can be integrated in a processing unit.
In the above-described embodiments, all emphasize particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Divide the associated description that may refer to other embodiment.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (6)
1. the method for data flow is sent in a kind of mimo system, it is characterized in that, data flow is sent in existing mimo system
After the modulation mapping step of method, before emitting pre-treatment step, addition caching, binding inverible transform and interleaving treatment step
Suddenly, include the following steps：
Caching step：Each circuit-switched data stream after modulation mapping pre-treatment and modulation mapping is cached respectively, obtains each way
According to block, wherein, each data block includes N number of modulation symbol；
Bind inverible transform step：Each circuit-switched data block obtained to caching carries out binding inverible transform respectively, makes each modulation
The energy of symbol has all been diffused into two of entire time domain to N number of point, improves the utilization rate of time domain dimension；Wherein, bind
Each data block after inverible transform includes N number of component；
Interleaving treatment step：The data block handled binding inverible transform is interleaved processing；By making any one number
Emitted according to block by the antenna of two and two or more, so as to fulfill each complete modulation symbol before binding inverible transform
It can be emitted by the antenna of two and two or more, so that spatial domain dimension is more than or equal to reception antenna number NR, improve empty
The utilization rate of domain dimension；Make the dimension of MIMO signals of communication increase by way of increasing time domain dimension and spatial domain dimension, from
And obtain big dimensional effect；
The interleaving treatment is to ensure same time slot, the component for the data flow that every antenna transmission is not gone the same way, the interleaving treatment
Step interweaves including piecemeal；
The interleaving treatment passes through two and two through but not limited to N number of component in the data block after making binding inverible transform
Above antenna transmitting so that each complete modulation symbol after data sending terminal modulation mapping by two and two with
On antenna transmitting；
Inverible transform is bound using discrete Fourier transform, as carrying out direct computation of DFT respectively to each circuit-switched data block obtained by caching
The energy of any one modulation symbol in data block before binding inverible transform is diffused on N number of point of time domain by leaf transformation, when
Domain dimension is N；Interleaving mode uses piecemeal interleaving mode, will bind the data block after inverible transform is bound and passes through NTRoot antenna passes
Defeated, the energy of the data block after will binding is evenly distributed to NTOn root antenna, each before realization binding inverible transform is complete
Whole modulation symbol passes through NTRoot antenna emits, and spatial domain dimension is NTNR；The dimension of MIMO signals of communication is NNTNR, wherein, NTWith
NRTransmitting antenna number and reception antenna number, element number N=c × N that data block includes are represented respectivelyT, c >=1, c represent data block
When piecemeal interweaves, the number for the element that each sub-block is included.
2. the method for data flow is sent in a kind of mimo system as described in claim 1, it is characterized in that, the binding possibility of reversal
Including but not limited to discrete Fourier transform, discrete cosine transform or one kind in Walsh conversion or any number of combination are changed, it is described
It is the inverible transform for having binding effect to bind inverible transform, and the binding effect refers to any one in the vector before binding
A component can all influence vectorial two obtained after conversion to N number of component, the energy of any one component of the vector before binding
Amount has been diffused into vectorial two after binding by conversion to N number of component.
3. the method for data flow is sent in a kind of mimo system as described in claim 1, it is characterized in that, the binding possibility of reversal
It changes, the energy of binding inverible transform before processing data each modulation symbol in the block is made to be diffused into the two of entire time domain
On a above point so that data each component in the block after binding inverible transform arrives N for two in the block with data before conversion
A modulation symbol has correlation, realizes the binding of data block, improves the utilization rate of time domain dimension.
4. the device of data flow is sent in a kind of mimo system, it is characterized in that, data flow is sent in existing mimo system
After the modulation mapping block of method, before emitting pre-processing module, addition cache module, binding inverible transform module and intertexture
Processing module, including following module：
Cache module：Each circuit-switched data stream after modulation mapping pre-treatment and modulation mapping is cached, obtains each circuit-switched data block,
Wherein, each data block includes N number of modulation symbol；
Bind inverible transform module：Each circuit-switched data block obtained to caching carries out binding inverible transform respectively, makes each modulation
The energy of symbol has all been diffused into two of entire time domain to N number of point, improves the utilization rate of time domain dimension, realizes data
The binding of block；Wherein, bind each data block after inverible transform and include N number of component；
Interleaving treatment module：The data block handled binding inverible transform is interleaved processing；By making any one number
Emitted according to block by the antenna of two and two or more, so as to fulfill each complete modulation symbol before binding inverible transform
It can be emitted by the antenna of two and two or more, so that spatial domain dimension is more than or equal to reception antenna number NR, improve empty
The utilization rate of domain dimension；Make the dimension of MIMO signals of communication increase by way of increasing time domain dimension and spatial domain dimension, from
And obtain big dimensional effect；
The interleaving treatment module is to ensure same time slot, the component for the data flow that every antenna transmission is not gone the same way, the intertexture
Processing module includes piecemeal interleaving block；
The interleaving treatment module through but not limited to N number of component in the data block after making binding inverible transform by two and
The antenna transmitting of two or more so that each complete modulation symbol after data sending terminal modulation mapping passes through two and two
Antenna transmitting more than root；
Inverible transform is bound using discrete Fourier transform, as carrying out direct computation of DFT respectively to each circuit-switched data block obtained by caching
The energy of any one modulation symbol in data block before binding inverible transform is diffused on N number of point of time domain by leaf transformation, when
Domain dimension is N；Interleaving mode uses piecemeal interleaving mode, will bind the data block after inverible transform is bound and passes through NTRoot antenna passes
Defeated, the energy of the data block after will binding is evenly distributed to NTOn root antenna, each before realization binding inverible transform is complete
Whole modulation symbol passes through NTRoot antenna emits, and spatial domain dimension is NTNR；The dimension of MIMO signals of communication is NNTNR, wherein, NTWith
NRTransmitting antenna number and reception antenna number, element number N=c × N that data block includes are represented respectivelyT, c >=1, c represent data block
When piecemeal interweaves, the number for the element that each sub-block is included.
5. the device of data flow is sent in a kind of mimo system as claimed in claim 4, it is characterized in that, the binding possibility of reversal
Mold changing block includes but not limited to one kind in discrete Fourier transform module, discrete cosine transform module or Walsh conversion modules
Or any number of combination, the binding inverible transform module is the inverible transform module for having binding effect, and the binding effect is
Vectorial two that any one component of vector before finger binding can all influence to obtain after conversion arrive N number of component, before binding
The energy of any one component of vector has been diffused into vectorial two after binding by conversion to N number of component.
6. the device of data flow is sent in a kind of mimo system as claimed in claim 4, it is characterized in that, the binding possibility of reversal
Block is changed the mold, the energy of each modulation symbol before binding inverible transform is made to be diffused into two and two of entire time domain
On above point so that two in the block of data arrive N number of before binding data each component in the block after inverible transform and converting
Modulation symbol has correlation, realizes the binding of data block, improves the utilization rate of time domain dimension.
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