CN104168247A - Method and device for sending multiple routes of data streams through MIMO-OFDM system - Google Patents
Method and device for sending multiple routes of data streams through MIMO-OFDM system Download PDFInfo
- Publication number
- CN104168247A CN104168247A CN201410425950.9A CN201410425950A CN104168247A CN 104168247 A CN104168247 A CN 104168247A CN 201410425950 A CN201410425950 A CN 201410425950A CN 104168247 A CN104168247 A CN 104168247A
- Authority
- CN
- China
- Prior art keywords
- random
- data block
- det
- conversion
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Radio Transmission System (AREA)
Abstract
The invention provides a method and device for sending multiple routes of data streams through an MIMO-OFDM system. The method includes the steps of converting data blocks in the data streams of all antennas into frequency-domain baseband signals through DET conversion, wherein the DET conversion includes binding reversible conversion with the binding effect and random reversible conversion with randomness, and the DET conversion is cascading conversion of the two types of reversible conversion and is used for achieving dimension expanding and encrypting of the data blocks in the time domain and the frequency domain; processing the frequency-domain baseband signals and converting to the time domain to send the signals. By means of the method and the device, the number of dimensions of each symbol in the data blocks can be increased, and the BER performance of a transmission system can be improved. Meanwhile, transmission safety can be achieved by introducing the random reversible conversion.
Description
Technical field
The present invention relates to the communications field, particularly, relate to a kind of MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output)-OFDM (Orthogonal Frequency Division Multiplexing, OFDM) system sends the method and apparatus of multiplex data stream.
Background technology
Common MIMO-OFDM system as shown in Figure 1 sends the method schematic diagram of multiplex data stream, and the method comprises the following steps:
At TO_1, to N
tcircuit-switched data stream carries out chnnel coding.Wherein, all N
tcircuit-switched data stream can adopt a channel encoder coding, adopts after a channel encoder coding, then is divided into N
tcircuit-switched data stream; Also can adopt a channel encoder coding in each Huo Ji road, road, in this case, multiplex (MUX) encoder can be the same or different.
At TO_2, to N
tcircuit-switched data stream is modulated mapping, according to the sign map mode adopting by N
tthe information bit of each circuit-switched data stream in circuit-switched data stream is mapped in planisphere corresponding points, and multiplex data stream can adopt the identical different modulation mapping mode that also can adopt.As those skilled in the art know, modulate mapping, bit mapping here, planisphere mapping has identical implication.
In MIMO-OFDM system, generally adopt the modulation mapping techniques such as QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation), MPSK (M-ary Phase Shift Keying, multi-system digital phase modulation).
At TO_3, to N
tcircuit-switched data stream is gone here and there respectively and changes, and obtains the data block after corresponding each data flow piecemeal, and wherein the length of data block is N
b.Wherein, length is N
bdata block and N
bdimensional vector has identical meanings, and above-mentioned data block and vector have identical meanings, and the length of data block is vectorial dimension.The length of data block is N
b; Block length determines by the useful load of an OFDM symbol, and the useful load here refers to that an OFDM symbol removes after the expenses such as virtual carrier, pilot tone, the symbolic number of the useful data that OFDM symbol can transmit.
At TO_4, at frequency domain, insert pilot tone and/or virtual carrier etc., be used for realizing channel estimating, synchronous and oversampling etc.It should be noted that, because the insertion of pilot tone and/or virtual carrier, the length of data block is by N
bbecome N
c, and N
c>=N
b.
At TO_5, to N
teach data block of circuit-switched data stream is carried out respectively N
cpoint IDFT (Inverse Discrete Fourier Transformation, discrete fourier inverse transformation), obtains time domain baseband signal.IDFT has fast algorithm IFFT (Inverse Fast Fourier Transform, fast discrete inverse Fourier transform), and the fast algorithm of corresponding DFT is FFT (Fast Fourier Transform, fast discrete Fourier transform).
At TO_6, to N
tthe time domain baseband signal corresponding to each data block of circuit-switched data stream inserted respectively protection interval.Wherein, insert and protect the mode at interval comprise insertion Cyclic Prefix (CP, Cyclic Prefix) and insert zero padding (ZP, Zero Padding) and insert unique word (Unique Word, UW) etc.
At TO_7, to N
tcircuit-switched data stream carries out respectively parallel-serial conversion.
At TO_8, to N
tcircuit-switched data stream is launched respectively pre-treatment.Transmitting pre-treatment can comprise the processes such as radio frequency, intermediate frequency Modulation, amplification and Base-Band Processing.
In Fig. 1, the order of step TO_2 and TO_3 can exchange, the order of TO_6 and TO_7 also can exchange.
Above-mentioned MIMO-OFDM system sends in the method for multiplex data stream; transmission system is utilized insufficient to the dimension of signal of communication (degree of freedom); cause between its accessible transmission rate and channel capacity also existing very large gap, and the transmission of data flow do not have safeguard protection, be easily ravesdropping.
For MIMO-OFDM system, send in the process of multiplex data stream, have the lower and poor problem of transmission security of transmitting efficiency, not yet propose at present simple and effective solution.
Summary of the invention
The object of the present invention is to provide a kind of method and apparatus of MIMO-OFDM system transmission multiplex data stream, to solve the above problems.
The embodiment of the present invention provides a kind of MIMO-OFDM system to send the method for multiplex data stream, comprise: the data block in the data flow of Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively, this DET conversion comprises: the random inverible transform that has the binding inverible transform of binding effect and have randomness, this DET conversion is the cascaded transformation of above-mentioned two inverible transforms, in order to realize the time domain of data block and being augmented and encrypting of two territories of frequency domain; After above-mentioned each road frequency domain baseband signal is processed, transforming to time domain sends.Wherein, described N
tthe DET mapping mode that the data block of circuit-switched data stream is carried out can be identical, also can be different.
Data block in the data flow of above-mentioned Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively and comprises: the data block in the data flow of the binding principle Jiang Ge road antenna based on before and after data transformation is bound respectively inverible transform, makes data block become frequency domain baseband signal from symbol field baseband signal; Data block after binding inverible transform is carried out respectively to random inverible transform.
Data block in the data flow of above-mentioned Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively and comprises: the data block in the data flow of Jiang Ge road antenna is carried out respectively DFT conversion; By random permutation matrix, the data block after DFT conversion is carried out to random permutation, wherein, this random permutation matrix be each row and column only to have an element be 1, all the other elements are orthogonal matrixes of 0, wherein, 1 position is random.
Data block in the data flow of above-mentioned Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively and comprises: the data block in the data flow of Jiang Ge road antenna is carried out respectively Walsh conversion; By random permutation matrix, the data block after Walsh conversion is carried out to random permutation, wherein, this random permutation matrix be each row and column only to have an element be 1, all the other elements are orthogonal matrixes of 0, wherein, 1 position is random.
Data block in the data flow of above-mentioned Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively and comprises: the data block in the data flow of Jiang Ge road antenna is carried out respectively dct transform; Data block by Random-Rotation matrix after to dct transform is carried out Random-Rotation, and wherein, Random-Rotation matrix is that all diagonal elements are all that mould is 1 random complex, and all the other elements are unitary matrice of 0.
The embodiment of the present invention also provides a kind of MIMO-OFDM system to send the device of multiplex data stream, comprise: DET conversion module, the data block that is used for the data flow of Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively, DET conversion comprises: have the binding inverible transform of binding effect and have the random inverible transform of randomness, described DET conversion is the cascaded transformation of above-mentioned two inverible transforms, in order to realize the time domain of data block and being augmented and encrypting of two territories of frequency domain; Sending module, sends for DET conversion module being obtained to transform to time domain after Ge road frequency domain baseband signal is processed.
Above-mentioned DET conversion module comprises: binding inverible transform unit, for the data block of the data flow of the binding principle Jiang Ge road antenna based on before and after data transformation, bind respectively inverible transform, and make data block become frequency domain baseband signal from symbol field baseband signal; Random inverible transform unit, carries out respectively random inverible transform for the data block to after above-mentioned binding inverible transform.
Above-mentioned DET conversion module comprises: DFT converter unit, carries out respectively DFT conversion for the data block of the data flow of Jiang Ge road antenna; The first random permutation unit, for the data block after DFT conversion being carried out to random permutation by random permutation matrix, wherein, random permutation matrix be each row and column only to have an element be 1, all the other elements are orthogonal matrixes of 0, wherein, 1 position is random.
Above-mentioned DET conversion module comprises: Walsh converter unit, carries out respectively Walsh conversion for the data block of the data flow of Jiang Ge road antenna; The second random permutation unit, carries out random permutation for the data block after Walsh being converted by random permutation matrix, wherein, this random permutation matrix is that only to have an element be 1 to each row and column, all the other elements are orthogonal matrixes of 0, and wherein, 1 position is random.
Above-mentioned DET conversion module comprises: dct transform unit, carries out respectively discrete cosine transform for the data block of the data flow of Jiang Ge road antenna; Random-Rotation converter unit, for by Random-Rotation matrix the data block after to dct transform carry out Random-Rotation, wherein, Random-Rotation matrix is that all diagonal elements are all that mould is 1 random complex, all the other elements are unitary matrice of 0.
The method and apparatus that the embodiment of the present invention provides, by each data block is carried out respectively to DET conversion, has been expanded the dimension of the signal of communication of system transmission, and based on this, receiving terminal can improve its BER performance., by introducing DET, convert meanwhile, guaranteed the fail safe of transmission.
Accompanying drawing explanation
Fig. 1 is the method schematic diagram that the common MIMO-OFDM system in correlation technique sends multiplex data stream;
Fig. 2 sends the method schematic diagram of multiplex data stream according to a kind of MIMO-OFDM system of the embodiment of the present invention;
Fig. 3 A is according to the general schematic flow diagram of DET implementation method in a kind of MIMO-OFDM system of the embodiment of the present invention;
Fig. 3 B is according to the schematic flow diagram of DET implementation method in a kind of MIMO-OFDM system of the embodiment of the present invention;
Fig. 3 C is according to the schematic flow diagram of DET implementation method in a kind of MIMO-OFDM system of the embodiment of the present invention;
Fig. 3 D is according to the schematic flow diagram of DET implementation method in a kind of MIMO-OFDM system of the embodiment of the present invention;
Fig. 4 A is the general device schematic diagram of realizing according to DET in a kind of MIMO-OFDM system of the embodiment of the present invention;
Fig. 4 B is the device schematic diagram of realizing according to DET in a kind of MIMO-OFDM system of the embodiment of the present invention;
Fig. 4 C is the device schematic diagram of realizing according to DET in a kind of MIMO-OFDM system of the embodiment of the present invention;
Fig. 4 D is the device schematic diagram of realizing according to DET in a kind of MIMO-OFDM system of the embodiment of the present invention.
Embodiment
Below by concrete preferred embodiment, also by reference to the accompanying drawings the present invention is described in further detail, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
In order to promote MIMO-OFDM system, send the transmitting efficiency of multiplex data stream and the fail safe of transmission, the embodiment of the present invention provides a kind of MIMO-OFDM system to send the method and apparatus of multiplex data stream, below by embodiment, is described.
The present embodiment provides a kind of MIMO-OFDM system to send the method for multiplex data stream, and the method comprises the following steps:
(1) data block in the data flow of Jiang Ge road antenna is respectively by DET (Dimension Extended Transform, be augmented conversion) be transformed to frequency domain baseband signal, this DET conversion comprises: the random inverible transform that has the binding inverible transform of binding effect and have randomness, this DET conversion is the cascaded transformation of above-mentioned two inverible transforms, in order to realize the time domain of data block and being augmented and encrypting of two territories of frequency domain;
Described being augmented, refers to the dimension (namely dimension) that expands signal of communication, and the dimension of the MIMO signal of communication of embodiment of the present invention definition comprises time domain dimension, frequency domain dimension and the spatial domain dimension of signal of communication.Concrete meaning is counting of the time domain that has influence at receiving terminal of the symbol (abbreviation modulation symbol) after a modulation mapping or frequency domain or spatial domain signal.For example, for common mimo system, the symbol that transmitting terminal sends through a transmit antennas, all N of receiving terminal
rroot reception antenna can be received this symbol, and the counting of spatial domain that namely symbol has influence on is N
r, the spatial domain dimension of this MIMO signal is exactly N
r.Equally, a common MIMO-OFDM transmitted signal, the symbol that transmitting terminal sends is due to the effect of IDFT, and counting that it has influence in time domain is the points N of IDFT
c, its time domain dimension is exactly N
c; Its frequency domain, because each OFDM symbol is localised on a frequency domain subchannel at frequency domain, its frequency domain dimension is 1.
Binding inverible transform is a kind of inverible transform, and this inverible transform can complete the binding function of data, described binding function refers to that after binding converts, obtaining each vectorial component sets up dependence with a plurality of symbols of binding before conversion, the energy of each symbol before namely binding conversion, all will be diffused on the vectorial a plurality of components that obtain after binding conversion.Therefore, this binding inverible transform has realized the frequency domain that sends data block and has been augmented.
For the present embodiment, the above-mentioned frequency domain dimension that is augmented each symbol in the data block making before DET conversion realizes is increased, above-mentioned encryption refers to due to the randomness of DET conversion, makes receiving terminal in the situation that not knowing key, cannot complete correct demodulation to received signal.
Data block in the data flow of above-mentioned Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively and can comprises: the data block in the data flow of the binding principle Jiang Ge road antenna based on before and after data transformation is bound respectively inverible transform, makes data block become frequency domain baseband signal from symbol field (referring to the set at the symbol place that data block obtains after modulation mapping) baseband signal; Data block after binding inverible transform is carried out respectively to random inverible transform.So-called binding, referring to bind each symbol obtaining before each vectorial component converts with binding after conversion has dependence, and the energy of each symbol before namely binding converts, all will be diffused on the vectorial a plurality of components that obtain after binding conversion.In order further to understand binding inverible transform and the random inverible transform in above-mentioned DET conversion, details are as follows for the present embodiment:
(1) binding inverible transform is a kind of inverible transform with binding effect, with mathematical formulae, is expressed as y=T (x), wherein, and y=(y
1, y
2..., y
n)
t, x=(x
1, x
2..., x
n)
tbe the vector of same dimension, T is the transformation operator of binding inverible transform; So-called binding effect, refers to any one the component x of the x before conversion
i, i=1,2 ..., N can affect two to N the components of the vectorial y obtaining after conversion, the energy of any one component of x has been diffused into by conversion on two to N the components of y, also can say y important and a plurality of components x have correlation.
(2) random inverible transform is a kind of Linear Invertible Transforms with randomness, and typical random inverible transform comprises random permutation (being also random interleaving), random anti-phase conversion and Random-Rotation conversion.The transformation matrix of random permutation be every a line and each row to only have an element be 1, all the other elements are all 0 orthogonal matrixes, where its randomness is random if being embodied in and appearing at specific to 1 of certain a line; The transformation matrix of random anti-phase conversion is that diagonal element is+1 or-1 diagonal matrix, its randomness be embodied in specific to some diagonal elements be+the 1 or the-the 1st, random; Random-Rotation matrix is that k diagonal element is
plural twiddle factor, θ wherein
k∈ [0,1) be random.
In the method, by the data block in the data flow of Jiang Ge road antenna, bind respectively inverible transform, data block can be become to frequency domain baseband signal from symbol field baseband signal, realize the binding of data block.By being carried out respectively to random inverible transform, the data block after binding inverible transform realizes DET; By the random inverible transform after binding inverible transform, change the spectrum structure of above-mentioned frequency domain baseband signal, realize time domain and frequency domain and be augmented and encrypt.
Wherein, the data block in the data flow of each road antenna can be the data block obtaining in the following way: the data flow of Dui Ge road antenna is carried out chnnel coding, modulation mapping and gone here and there and change, and obtains the data block of corresponding each data flow.The chnnel coding of the present embodiment, modulation are shone upon can be identical with the mode in the TO_1 to TO_3 shown in Fig. 1 with the specific implementation of going here and there and changing, and no longer describes in detail here.
(2) transforming to time domain after above-mentioned each road frequency domain baseband signal is processed sends.This processing can comprise: the data block after DET conversion is carried out to pilot tone and/or virtual carrier insertion, IDFT or DFT (Discrete Fourier Transform, discrete Fourier transform), obtain the multichannel time domain baseband signal corresponding with multiplex data stream; Above-mentioned multichannel time domain baseband signal is inserted respectively to protection interval, parallel-serial conversion and transmitting pre-treatment.
Wherein, above-mentioned pilot tone and/or virtual carrier insertion, IDFT (or DFT), insertion protection interval, parallel-serial conversion and transmitting pre-treatment can be identical with the mode of the TO_4 to TO_8 shown in Fig. 1, no longer describe in detail here.
The MIMO-OFDM system that the embodiment of the present invention shown in Figure 2 provides sends the method schematic diagram of multiplex data stream, and the method comprises the following steps:
At TD_1, to N
tcircuit-switched data stream carries out chnnel coding.
At TD_2, to N
tcircuit-switched data stream is modulated mapping.
At TD_3, to N
tcircuit-switched data stream is gone here and there respectively and changes, and obtains the data block after corresponding each data flow piecemeal.
At TD_4, to N
teach data block of circuit-switched data stream is carried out respectively DET conversion, realizes when being augmented the signal waveform after modulation is encrypted.Wherein, DET conversion is realized by binding inverible transform and random inverible transform cascade.
At TD_5, insert pilot tone and/or virtual carrier etc., be used for realizing channel estimating, synchronous and oversampling etc., the function of this step is identical with the TO_4 in Fig. 1 with implementation.
At TD_6, to N
teach data block of circuit-switched data stream is carried out respectively N
cpoint IDFT, obtains time domain baseband signal.
At TD_7, to N
tthe time domain baseband signal corresponding to each data block of circuit-switched data stream inserted respectively protection interval.
At TD_8, to N
tcircuit-switched data stream carries out respectively parallel-serial conversion.
At TD_9, to N
tcircuit-switched data stream is launched respectively pre-treatment.
In Fig. 2, step TD_1～TD_3, TD_5～TD_9 are identical with step TO_1～TO_3, TO_4～TO_8 in above-mentioned Fig. 1, are therefore no longer described further.Different from Fig. 1, the step TD_4 that Fig. 2 increases has realized above-mentioned DET conversion.
In the method for the present embodiment, by each data block, carry out respectively DET conversion, expanded the dimension of transmitted signal, based on this, receiving terminal can improve its BER performance., by introducing DET, convert meanwhile, guaranteed the fail safe of transmission.
Need to further illustrate, for sake of convenience, the embodiment of the present invention is with N
t≤ N
rand the situation of channel matrix full rank is that example illustrates, wherein, N
tfor number of transmit antennas, N
rfor reception antenna number.It should be appreciated by those skilled in the art that for N
t>N
rand N
t≤ N
rand channel matrix lacks order and meets the situation that order is greater than 1, the method that adopts again the embodiment of the present invention to provide after all can processing in advance by technology such as precodings.
General schematic flow diagram referring to the MIMO-OFDM system DET implementation method shown in Fig. 3 A, specifically comprises the following steps:
At TD_1～TD_3, respectively to N
tcircuit-switched data stream DS-1, DS-2 ..., DS-N
tcarry out chnnel coding, modulation mapping and go here and there and change after, become corresponding data block DB-1, DB-2 ..., DB-N
t, the embodiment of the present invention is referred to as symbol field baseband signal.The method of processing is identical with step described in Fig. 1, at this, is no longer described further.
At TD_4, to the DB-1 after above-mentioned processing, DB-2 ..., DB-N
tsymbol field baseband signal is carried out respectively N
bpoint DET conversion becomes transform domain baseband signal by symbol field baseband signal.
At TD_5, above-mentioned transform domain baseband signal is inserted to pilot tone and/or virtual carrier.
At TD_6, DB-1, the DB-2 after DET is converted ..., DB-N
tcarry out respectively N
cpoint IDFT transforms to time domain.Those skilled in the art should be appreciated that, the data by channel are referred to as time domain data conventionally, without the base band data of transmitting pre-treatment, is conventionally referred to as time domain baseband signal before and after parallel-serial conversion.
At TD_7～TD_9, respectively to DB-1, DB-2 ..., DB-N
tinsert protection interval and reprocessing, the method for processing is identical with step described in Fig. 1, at this, is no longer described further.
The specific descriptions of DET conversion implementation procedure in the present embodiment are provided below.The realization of DET conversion comprises step TD_4-1 and step TD_4-2.
At TD_4-1, realize binding inverible transform.Described binding inverible transform completes data block and binds and realize being augmented of transform domain baseband signal.Wherein, common typical bind inverible transform can be DFT conversion, DCT (Discrete Cosine Transform) conversion, the inverible transform that transform domain is augmented is bound and realized to Walsh conversion and other the data block that can realize, and the combination in any of above-mentioned inverible transform.Based on this, the data block in the data flow of above-mentioned Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively and can comprises one of following mode:
(1) data block in the data flow of Jiang Ge road antenna is carried out respectively DFT conversion; By random permutation matrix, the data block after DFT conversion is carried out to random permutation, wherein, this random permutation matrix be each row and column only to have an element be 1, all the other elements are orthogonal matrixes of 0, wherein, 1 position is random.
(2) data block in the data flow of Jiang Ge road antenna is carried out respectively Walsh conversion; By random permutation matrix, the data block after Walsh conversion is carried out to random permutation, wherein, this random permutation matrix be each row and column only to have an element be 1, all the other elements are orthogonal matrixes of 0, wherein, 1 position is random.
(3) data block in the data flow of Jiang Ge road antenna is carried out respectively dct transform; Data block by Random-Rotation matrix after to dct transform is carried out Random-Rotation, and wherein, Random-Rotation matrix is that all diagonal elements are all that mould is 1 random complex, and all the other elements are unitary matrice of 0.
For sake of convenience, below, Yi Yi road DET is transformed to its process of example explanation.
represent the i road signal useful load data that namely i root antenna will send, i=1,2 ..., N
t, the invertible matrix of the binding inverible transform of DET conversion is T
1 (i), the data block after i road TD_4-1 conversion is expressed as S
i=T
1 (i)s
i, i=1,2 ..., N
t.It should be noted that, corresponding to N
tthe invertible matrix T of the data block in circuit-switched data stream in each circuit-switched data stream
1 (i)can be the same or different.
At TD_4-2, realize random inverible transform.Described random inverible transform realizes the change to the signal structure of frequency domain baseband signal, make the IDFT of transmitting terminal or the DFT of receiving terminal cannot realize the signal despreading after frequency domain is augmented, thereby be augmented and encrypt when realizing the time domain of transmitted signal and two territories of frequency domain.Adopt random invertible matrix T
2 (i), Z
i=T
2 (i)s
i, i=1,2 ..., N
t, complete the DET conversion to each data block.It should be noted that, corresponding to N
tthe random invertible matrix T of the data block in circuit-switched data stream in each circuit-switched data stream
2 (i)can be the same or different.
In this schematic diagram, N
ci road time-domain data blocks to be sent after some IDFT
Here, random inverible transform matrix is jointly arranged by transceiver communication both sides or adopts identical method to generate, and the concrete generation method of random inverible transform matrix has discussion in multiple mathematics books, does not belong to content of the present invention.
Embodiment 1
Referring to the schematic flow diagram of DET implementation method in the MIMO-OFDM system shown in Fig. 3 B, in this embodiment, N
t=4, but it should be appreciated by those skilled in the art that described method is applicable to N
t>=2 data flow.
Method shown in Fig. 3 B comprises following processing procedure.
At TD_1～TD_3, respectively to N
tafter circuit-switched data stream DS-1, DS-2, DS-3, DS-4 carry out chnnel coding, modulation mapping and go here and there and change, become corresponding data block DB-1, DB-2, DB-3, DB-4, be referred to as symbol field baseband signal.The method of processing is identical with step described in Fig. 2, at this, is no longer described further.
At TD_4, the DB-1 after above-mentioned processing, DB-2, DB-3, DB-4 symbol field baseband signal are carried out respectively to N
bpoint DET conversion becomes frequency domain baseband signal by symbol field baseband signal.
At TD_5～TD_9, respectively above-mentioned frequency domain baseband signal insertion pilot tone and/or imaginary load are involved to reprocessing, the method for processing is identical with step TD_5～TD_9 described in Fig. 2, at this, is no longer described further.
The specific descriptions of DET conversion implementation procedure in the embodiment of the present invention are provided below.The realization of DET conversion comprises step TD_4-1 and step TD_4-2.
At TD_4-1, realize DFT conversion, data block becomes frequency domain from symbol field.DFT conversion realizes frequency domain and is augmented.
The time domain useful load data block of the correspondence i root antenna before DFT conversion
i=1,2 ..., 4, the block of frequency domain data after DFT conversion is expressed as S
i=Fs
i, i=1,2 ..., 4, now F represents DFT transformation matrix.
At TD_4-2, realize random permutation, the conversion of this random permutation realizes the change to the frequency-region signal structure after TD_4-1 conversion, and can guarantee that IDFT below can not untie the frequency domain that TD_4-1 does and be augmented, thereby realizes being augmented of time domain baseband signal.Structure random permutation matrix P
(i), Z
i=P
(i)s
i, i=1,2 ..., 4, complete the DET conversion to each data block.It should be noted that, corresponding to the random permutation matrix P of the data block in each circuit-switched data stream in 4 circuit-switched data streams
(i)can be the same or different.
In the present embodiment, N
t=4, N
ci road time-domain data blocks to be sent after some IDFT
Embodiment 2
Schematic flow diagram referring to the MIMO-OFDM system DET implementation method shown in Fig. 3 C.In this embodiment, N
t=2, but it should be appreciated by those skilled in the art that described method is applicable to N
t>=2 data flow.
At TD_1～TD_3, respectively 2 circuit-switched data stream DS-1 and DS-2 are carried out to DET pre-treatment, obtain corresponding data block DB-1 and DB-2.Wherein, DET pre-treatment comprises the step TD_1～TD_3 shown in Fig. 2, at this, is no longer described further.
At TD_4, the DB-1 after above-mentioned processing and DB-2 are carried out respectively to N
bpoint DET conversion, becomes frequency domain baseband signal by symbol field baseband signal.
At TD_5～TD_9, respectively to DB-1 with DB-2 inserts pilot tone and/or imaginary load involves reprocessing.Wherein, DET reprocessing comprises the step TD_5～TD_9 shown in Fig. 2, at this, is no longer described further.
The specific descriptions of DET conversion implementation procedure in the embodiment of the present invention are provided below.The realization of DET conversion comprises step TD_4-1 and step TD_4-2.
At TD_4-1, realize Walsh conversion, data block becomes frequency domain by symbol field, and Walsh conversion realizes frequency domain and is augmented.
The frequency domain useful load data block of the correspondence i root antenna before Walsh conversion
i=1,2, the block of frequency domain data after Walsh conversion is expressed as S
i=Ws
i, i=1,2, wherein W is Walsh transformation matrix.
At TD_4-2, realize random permutation, described random permutation conversion realizes being augmented of frequency domain baseband signal.Structure random permutation matrix P
(i), Z
i=P
(i)s
i, i=1,2, complete the DET conversion to each data block.It should be noted that, corresponding to the random permutation matrix P of the data block in each circuit-switched data stream in 2 circuit-switched data streams
(i)can be the same or different.
In the present embodiment, N
t=2, N
ci road time-domain data blocks to be sent after some IDFT
It should be appreciated by those skilled in the art that the Walsh conversion in the DET conversion that the present embodiment provides is exemplary, any inverible transform that meets binding data piece function is equally applicable to the present invention.Need to further illustrate, when the length of data block is not 2
ntime, n is positive integer, Walsh conversion needs piecemeal to realize; When Walsh conversion adopts piecemeal to realize, its random inverible transform below can adopt piecemeal to realize, and also a plurality of piecemeals after Walsh conversion can be synthesized after a data block according to former piecemeal der group, adopts a random invertible matrix to realize.
The DET conversion that it should be appreciated by those skilled in the art that the embodiment of the present invention can adopt the mode of this piecemeal realization to realize.
Embodiment 3
Fig. 3 D is according to the schematic flow diagram of a kind of MIMO-OFDM system DET implementation method of the embodiment of the present invention.
In this embodiment, N
t=2, but it should be appreciated by those skilled in the art that described method is applicable to N
t>=2 data flow.
At TD_1～TD_3, respectively 2 circuit-switched data stream DS-1 and DS-2 are carried out to DET pre-treatment, obtain corresponding data block DB-1 and DB-2.Wherein, DET pre-treatment comprises the step TD_1～TD_3 shown in Fig. 2, at this, is no longer described further.
At TD_4, the DB-1 after above-mentioned processing and DB-2 are carried out respectively to N
bpoint DET conversion, becomes frequency domain baseband signal by symbol field baseband signal.
At TD_5～TD_9, respectively to DB-1 with DB-2 inserts pilot tone and/or imaginary load involves reprocessing.Wherein, DET reprocessing comprises the step TD_5～TD_9 shown in Fig. 2, at this, is no longer described further.
The specific descriptions of DET conversion implementation procedure in the present invention are provided below.The realization of DET conversion comprises step TD_4-1 and step TD_4-2.
At TD_4-1, realize dct transform, data block becomes frequency domain from symbol field.Dct transform is realized time domain and is augmented.
The frequency domain useful load data block of the correspondence i root antenna before dct transform
i=1,2, the block of frequency domain data after dct transform is expressed as S
i=Ds
i, i=1,2, now D represents i road DFT transformation matrix.
At TD_4-2, realize Random-Rotation, the conversion of described Random-Rotation realizes the change to the frequency-region signal structure after TD_4-1 conversion, and can guarantee that IDFT below can not untie the frequency domain that TD_4-1 does and be augmented, thereby realizes being augmented of time domain baseband signal.Structure Random-Rotation matrix Θ
(i), Z
i=Θ
(i)s
i, i=1,2, complete the DET conversion to each data block.It should be noted that Random-Rotation matrix Θ
(i)be a unitary matrice, all diagonal elements of this unitary matrice are all that mould is 1 random complex, and all the other elements are 0, Θ
(i)by both sides, arrange or generate, corresponding to the Random-Rotation matrix Θ of the data block in each circuit-switched data stream in 2 circuit-switched data streams
(1)and Θ
(2)can be the same or different; Further, random anti-phase conversion is the special circumstances of Random-Rotation conversion, and the diagonal element of the transformation matrix of random anti-phase conversion is-1 and+1, and off-diagonal element is 0.
In the present embodiment, N
t=2, N
ci road time-domain data blocks to be sent after some IDFT
It should be appreciated by those skilled in the art that the dct transform in the DET conversion that the present embodiment provides is exemplary, any inverible transform that meets binding data piece function is equally applicable to the present invention.
The concrete binding inverible transform that DET in above embodiment conversion adopts is only to describe for example with random inverible transform, any be there is the inverible transform of binding effect all can be in order to realize the binding inverible transform in above-described embodiment; Any inverible transform with randomness all can be in order to realize the random inverible transform in above-described embodiment; Also be that the embodiment of the present invention includes but not limited to several typical bind inverible transforms and the random inverible transform in specification embodiment, narrated.
The embodiment of the present invention also provides a kind of MIMO-OFDM system to send the device of multiplex data stream, comprise: DET conversion module, the data block that is used for the data flow of Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively, DET conversion comprises: binding inverible transform and random inverible transform, DET is the cascaded transformation of described two kinds of inverible transforms, in order to realize the time domain of data block and being augmented and encrypting of two territories of frequency domain; Sending module, sends for DET conversion module being obtained to transform to time domain after Ge road frequency domain baseband signal is processed.
The device of the present embodiment, by each data block is carried out respectively to DET conversion, has been expanded the dimension (degree of freedom) of transmitted signal, and based on this, receiving terminal can dwindle the gap between accessible transmission rate and channel capacity, improves its BER performance., by introducing DET, convert meanwhile, guaranteed the fail safe of transmission.
Referring to Fig. 4 A, be the general schematic diagram of device that the MIMO-OFDM system that provides corresponding to said method sends multiplex data stream, this device comprises following module.
Channel coding module 410, for carrying out chnnel coding to multiplex data stream;
Mapping block 420, processes for the multiplex data stream after channel coding module 410 codings is modulated to mapping;
String modular converter 430, go here and there and change for the multiplex data stream after mapping block 420 is processed, and obtains the data block of corresponding each data flow;
DET conversion module 440, for string each data block of obtaining of modular converter 430 are carried out respectively to DET conversion, obtain being augmented with encrypt after data block; Wherein, this DET conversion comprises: the random inverible transform that there is the binding inverible transform of binding effect and there is randomness, and this DET conversion is the cascaded transformation of above-mentioned two inverible transforms; Based on this, above-mentioned DET conversion module 440 comprises: binding inverible transform unit 440-1, the data block that is used for the data flow of the binding principle Jiang Ge road antenna based on before and after data transformation is bound respectively inverible transform, makes data block become frequency domain baseband signal from symbol field baseband signal; Random inverible transform unit 440-2, carries out respectively random inverible transform for the data block to after above-mentioned binding inverible transform;
Pilot tone and/or virtual carrier insert module 450, for carrying out pilot tone and/or virtual carrier insertion to the data block after 440 conversion of DET conversion module;
IDFT conversion module 460, for each data block after pilot tone and/or 450 processing of virtual carrier insert module is carried out to IDFT or DFT, obtains the multichannel time domain baseband signal corresponding with above-mentioned multiplex data stream;
Protection interval insert module 470, for inserting respectively protection interval to above-mentioned multichannel time domain baseband signal;
Parallel serial conversion module 480, carries out parallel-serial conversion for the multichannel time domain baseband signal that protection interval insert module 470 is inserted behind protection interval;
Sending module 490, for the data block after parallel serial conversion module 480 conversions is launched to pre-treatment, and the multiplex data stream after transmission processing.
Above-mentioned channel coding module 410 realizes N
tthe chnnel coding of circuit-switched data stream; Mapping block 420 is by N
tinformation bit in circuit-switched data stream is mapped in planisphere corresponding points according to adopted sign map mode; String modular converter 430 complete goes here and there and changes to obtain N
tcircuit-switched data flows corresponding data block; 440 couples of N of DET conversion module
teach data block corresponding to circuit-switched data stream carried out respectively DET conversion; Pilot tone and/or virtual carrier insert module 450 complete the insertion of pilot tone and/or virtual carrier etc., realize channel estimating, synchronous and oversampling etc.; IDFT conversion module 460 transforms to time domain by frequency domain baseband signal; 470 couples of N of protection interval insert module
teach data block corresponding to circuit-switched data stream inserted respectively protection interval; Parallel serial conversion module 480 completes parallel-serial conversion; Each data block that sending module 490 sends after above-mentioned resume module.
Need to further illustrate, DET conversion module 440 comprises binding inverible transform and random inverible transform function.Wherein, binding inverible transform function completes the binding of data block and sets up correlation, and random inverible transform function completes function of keeping secret and symbol energy is fully diffused into system can be utilized on every one dimension of time domain and frequency domain.
Referring to the MIMO-OFDM system shown in Fig. 4 B, send the general schematic diagram of device of multiplex data stream, this device is corresponding to the method shown in above-described embodiment 1, above-mentioned DET conversion module 440 comprises: DFT converter unit 440-3, carries out respectively DFT for the data block of the data flow of Jiang Ge road antenna; The first random permutation unit 440-4, for the data block after DFT conversion being carried out to random permutation by random permutation matrix, wherein, this random permutation matrix is that only to have an element be 1 to each row and column, all the other elements are orthogonal matrixes of 0, and wherein 1 position is random.
Referring to the MIMO-OFDM system shown in Fig. 4 C, send the general schematic diagram of device of multiplex data stream.This device is corresponding to the method shown in above-described embodiment 2, and DET conversion module 440 comprises: Walsh converter unit 440-5, carries out respectively Walsh conversion for the data block of the data flow of Jiang Ge road antenna; The second random permutation unit 440-6, carries out random permutation for the data block after Walsh being converted by random permutation matrix, wherein, this random permutation matrix is that only to have an element be 1 to each row and column, all the other elements are orthogonal matrixes of 0, and wherein, 1 position is random.
Referring to the MIMO-OFDM system shown in Fig. 4 D, send the general schematic diagram of device of multiplex data stream.This device is corresponding to the method shown in above-described embodiment 3, and DET conversion module 440 comprises: dct transform unit 440-7, carries out respectively discrete cosine transform for the data block of the data flow of Jiang Ge road antenna; Random-Rotation converter unit 440-8, for by Random-Rotation matrix the data block after to dct transform carry out Random-Rotation, wherein, Random-Rotation matrix is that all diagonal elements are all that mould is 1 random complex, all the other elements are unitary matrice of 0.Further, random anti-phase conversion is the special circumstances of Random-Rotation conversion, and the diagonal element of the transformation matrix of random anti-phase conversion is-1 and+1, and off-diagonal element is 0.
Those skilled in the art should understand that; when realizing the embodiment of the present invention; just, for the convenience illustrating has provided simply main functional module in Fig. 4 A to Fig. 4 D, not making the embodiment that increases other processing modules under creative work prerequisite, all belong to the scope of protection of the invention.
For convenience and simplicity of description, the specific works process of the device of describing in Fig. 4 A to Fig. 4 D and composition module thereof, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
In the embodiment providing in the application, should be appreciated that adopted apparatus and method can realize in other way, device described above is only exemplary, and the division of described module is only that a kind of logic function is divided, and during actual realization, can have other dividing mode.
It should be appreciated by those skilled in the art that the DET functional module in each embodiment of the present invention can comprise a plurality of processing modules, also can be integrated in a processing module.
Those skilled in the art should understand that, being augmented and encryption function of DET Implement of Function Module time domain in each embodiment of the present invention and the baseband signal of frequency domain, if do not need encryption function in practical application, and binding inverible transform has realized the function that is augmented of the time domain of transmitted signal and frequency domain, the random inverible transform in DET can save.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, do not have the part describing in detail can be referring to the associated description of other embodiment.
Above embodiment increases the method and apparatus of a DET conversion on the framework of existing MIMO-OFDM system.DET conversion is comprised of two conversion of cascade, is respectively binding inverible transform and random inverible transform; The effect of binding inverible transform is mainly the symbol binding realizing data block inside, and making to bind each symbol obtaining before each vectorial component converts with binding after conversion has dependence.Based on this, the binding inverible transform matrix of selection can be the inverible transform that DFT transformation matrix, Walsh transformation matrix, dct transform matrix have had data binding function.The effect of random inverible transform is the spectrum structure that changes legacy data piece, make the energy of each symbol after modulation mapping fully be diffused on every one dimension of system time domain and frequency domain dimension simultaneously, by multiplication of matrices principle, two conversion of the cascade of above-mentioned composition DET conversion can be combined into a possibility of reversal and bring realization.Due to the randomness of DET transformation matrix, can realize the signal waveform after modulation is encrypted.This waveform encryption method is different from existing bit-level encryption method, in the situation that not knowing key, cannot demodulate bit data flow, be therefore difficult under attack, therefore above-described embodiment is applied in wlan system, can well solve the safety problem existing in current WLAN technology.
Module in the embodiment of the present invention can be realized by hardware, firmware, software or their combination in any.Hardware typically refers to the module of physical structure, as electronics, electromagnetism, optics, photoelectricity, machinery, dynamo-electric components and parts, assembly or device etc.Software typically refers to logical construction, method, process, program, routine, process, algorithm, formula, function and expression formula etc.Firmware for example typically refers to, at hardware configuration (flash memory, EPROM) logical construction, method, process, program, routine, process, algorithm, formula, function and the expression formula etc. that in, realize, such as microcommand, reloadable control storage and microprogram structure etc.Module in embodiments of the invention, when utilizing software or firmware to realize, is one section of code of carrying out this functions of modules in essence.Software or firmware may comprise the actual code of realizing the method described in one embodiment of the invention, or for the code of these methods of simulation.Program or code segment can be stored in processor or machine accessible medium, can in wired or wireless channel, transmit." the readable addressable medium of processor " or " machine readable accessible " comprise anyly can store, the medium of transmission or transinformation, as electronic circuit, semiconductor memory system, read-only memory, flash memory, erasable read-only memory, programmable read only memory, floppy disk, read-only optical disc, CD, hard disk, fiberoptics medium and radio frequency link etc.Code segment can be downloaded by computer network, such as internet, Intranet etc.Machine accessible medium can be embedded in other products.Machine accessible medium can comprise, guides machine to carry out the data of above-mentioned various operations while accessing this machine, also can comprise the program code being embedded into wherein.Program code also can comprise the machine readable code that realizes aforesaid operations.Data refer to the information that is encoded to computer-readable any type, as program, code, data and file etc.
All or part module in embodiments of the invention can realize by hardware, software, firmware or their combination in any.Hardware, software and firmware module can severally intercouple.Hardware module can connect to realize the coupling with another module by the physics mode such as machinery, electronics, optics, electromagnetic.Software module is by function, process, method, subprogram, or transmissions such as subroutine call, instruction, link, parameter, variable and argument or function return value etc. realize and another module is coupled.The coupling of software module can be used for receiving variable, parameter, argument, pointer etc., and produces or transmit result, pointer, more new variables etc.Any combination of firmware module by above-mentioned hardware and software coupling process realizes the coupling with another module.Hardware, software or firmware module can with hardware, software or firmware module in any coupling.Module can be software-driven or with platform on the operating system moved carry out mutual interface, can also be for configuration, structure, initialization, the hardware driving that transmits and receive data.Device may comprise the combination in any of hardware, software and firmware module.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. multi-I/O OFDM MIMO-OFDM system sends a method for multiplex data stream, it is characterized in that, comprising:
Data block in the data flow of Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively, described DET conversion comprises: have the binding inverible transform of binding effect and have the random inverible transform of randomness, described DET conversion is the cascaded transformation of above-mentioned two inverible transforms, in order to realize the time domain of data block and being augmented and encrypting of two territories of frequency domain;
Described in Dui Ge road, frequency domain baseband signal transforms to time domain transmission after processing.
2. the method for claim 1, is characterized in that, the data block in the data flow of described Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively and comprises:
Data block in the data flow of the binding principle Jiang Ge road antenna based on before and after data transformation is bound respectively inverible transform, makes described data block become frequency domain baseband signal from symbol field baseband signal;
Data block after described binding inverible transform is carried out respectively to random inverible transform.
3. the method for claim 1, is characterized in that, the data block in the data flow of described Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively and comprises:
Data block in the data flow of Jiang Ge road antenna is carried out respectively discrete Fourier transform DFT;
By random permutation matrix, the data block after DFT conversion is carried out to random permutation, wherein, described random permutation matrix be each row and column only to have an element be 1, all the other elements are orthogonal matrixes of 0; Wherein, 1 position is random.
4. the method for claim 1, is characterized in that, the data block in the data flow of described Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively and comprises:
Data block in the data flow of Jiang Ge road antenna is carried out respectively Walsh Walsh conversion;
By random permutation matrix, the data block after Walsh conversion is carried out to random permutation, wherein, described random permutation matrix be each row and column only to have an element be 1, all the other elements are orthogonal matrixes of 0, wherein, 1 position is random.
5. the method for claim 1, is characterized in that, the data block in the data flow of described Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively and comprises:
Data block in the data flow of Jiang Ge road antenna is carried out respectively discrete cosine transform;
Data block by Random-Rotation matrix after to dct transform is carried out Random-Rotation, and wherein, described Random-Rotation matrix is that all diagonal elements are all that mould is 1 random complex, and all the other elements are unitary matrice of 0.
6. multi-I/O OFDM MIMO-OFDM system sends a device for multiplex data stream, it is characterized in that, comprising:
DET conversion module, the data block that is used for the data flow of Jiang Ge road antenna is transformed to frequency domain baseband signal by DET respectively, described DET conversion comprises: have the binding inverible transform of binding effect and have the random inverible transform of randomness, described DET conversion is the cascaded transformation of above-mentioned two inverible transforms, in order to realize the time domain of data block and being augmented and encrypting of two territories of frequency domain;
Sending module, processes rear transmission for described DET conversion module being obtained to frequency domain baseband signal described in Ge road.
7. device as claimed in claim 6, is characterized in that, described DET conversion module comprises:
Binding inverible transform unit, binds respectively inverible transform for the data block of the data flow of the binding principle Jiang Ge road antenna based on before and after data transformation, makes described data block become frequency domain baseband signal from symbol field baseband signal;
Random inverible transform unit, carries out respectively random inverible transform for the data block to after described binding inverible transform.
8. device as claimed in claim 6, is characterized in that, described DET conversion module comprises:
DFT converter unit, carries out respectively discrete Fourier transform DFT for the data block of the data flow of Jiang Ge road antenna;
The first random permutation unit, carries out random permutation for the data block after DFT being converted by random permutation matrix, wherein, described random permutation matrix is that only to have an element be 1 to each row and column, all the other elements are orthogonal matrixes of 0, and wherein, 1 position is random.
9. device as claimed in claim 6, is characterized in that, described DET conversion module comprises:
Walsh converter unit, carries out respectively Walsh Walsh conversion in order to the data block in the data flow of Jiang Ge road antenna;
The second random permutation unit, for the data block after Walsh conversion being carried out to random permutation by random permutation matrix, wherein, described random permutation matrix be each row and column only to have an element be 1, all the other elements are orthogonal matrixes of 0; Wherein, 1 position is random.
10. device as claimed in claim 6, is characterized in that, described DET conversion module comprises:
Dct transform unit, carries out respectively discrete cosine transform for the data block of the data flow of Jiang Ge road antenna;
Random-Rotation converter unit, for by Random-Rotation matrix the data block after to dct transform carry out Random-Rotation, wherein, described Random-Rotation matrix is that all diagonal elements are all that mould is 1 random complex, all the other elements are unitary matrice of 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410425950.9A CN104168247A (en) | 2014-08-27 | 2014-08-27 | Method and device for sending multiple routes of data streams through MIMO-OFDM system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410425950.9A CN104168247A (en) | 2014-08-27 | 2014-08-27 | Method and device for sending multiple routes of data streams through MIMO-OFDM system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104168247A true CN104168247A (en) | 2014-11-26 |
Family
ID=51911874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410425950.9A Pending CN104168247A (en) | 2014-08-27 | 2014-08-27 | Method and device for sending multiple routes of data streams through MIMO-OFDM system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104168247A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883213A (en) * | 2015-05-12 | 2015-09-02 | 杜岩 | Method and device for receiving data flow of dimension-expanded MIMO system |
| WO2016029838A1 (en) * | 2014-08-26 | 2016-03-03 | 杜岩 | Method and device for mimo communication data transmission |
| CN106713201A (en) * | 2015-11-17 | 2017-05-24 | 上海贝尔股份有限公司 | Method and device for channel multiplexing and demultiplexing |
| CN106899523A (en) * | 2015-12-16 | 2017-06-27 | 财团法人工业技术研究院 | Receiver apparatus for mimo communication system and control method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101103552A (en) * | 2004-12-22 | 2008-01-09 | 高通股份有限公司 | Methods and apparatus for mitigating multi-antenna correlation effect in communication systems |
| CN104144040A (en) * | 2014-08-26 | 2014-11-12 | 杜岩 | MIMO communication data sending method and device |
-
2014
- 2014-08-27 CN CN201410425950.9A patent/CN104168247A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101103552A (en) * | 2004-12-22 | 2008-01-09 | 高通股份有限公司 | Methods and apparatus for mitigating multi-antenna correlation effect in communication systems |
| CN104144040A (en) * | 2014-08-26 | 2014-11-12 | 杜岩 | MIMO communication data sending method and device |
Non-Patent Citations (1)
| Title |
|---|
| 闫胜虎: "基于DET的OFDM信道估计算法及分析", 《无线电工程》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016029838A1 (en) * | 2014-08-26 | 2016-03-03 | 杜岩 | Method and device for mimo communication data transmission |
| CN104883213A (en) * | 2015-05-12 | 2015-09-02 | 杜岩 | Method and device for receiving data flow of dimension-expanded MIMO system |
| CN104883213B (en) * | 2015-05-12 | 2018-09-18 | 杜岩 | One kind being augmented mimo system data stream reception method and device |
| CN106713201A (en) * | 2015-11-17 | 2017-05-24 | 上海贝尔股份有限公司 | Method and device for channel multiplexing and demultiplexing |
| CN106899523A (en) * | 2015-12-16 | 2017-06-27 | 财团法人工业技术研究院 | Receiver apparatus for mimo communication system and control method thereof |
| CN106899523B (en) * | 2015-12-16 | 2019-12-10 | 财团法人工业技术研究院 | Receiver apparatus for mimo communication system and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101510799B (en) | Wireless communication device and wireless communication method | |
| KR102624502B1 (en) | Systems, methods and devices for modulation-agnostic unitary braid division multiplexing signal conversion | |
| US9294941B1 (en) | Phase transformation of repeated signals | |
| TWI405429B (en) | Apparatus for transmitting data using carriers and method thereof | |
| Hasan | VLM precoded SLM technique for PAPR reduction in OFDM systems | |
| US20210036901A1 (en) | Communication system and method using unitary braid divisional multiplexing (ubdm) with physical layer security | |
| CN102916783A (en) | Method for transmitting, receiving and processing information, base station and user equipment | |
| US20240072854A1 (en) | Communication system and methods using very large multiple-in multiple-out (mimo) antenna systems with extremely large class of fast unitary transformations | |
| KR101221890B1 (en) | Method of generating code sequence, transmitting signals, apparatus thereof, code sequence, and code sequence set | |
| CN104168247A (en) | Method and device for sending multiple routes of data streams through MIMO-OFDM system | |
| CN105322991B (en) | MIMO transmission system and transmission method based on WFRFT precodings | |
| CN102960038B (en) | Signal to be sent in carrier wave communication system | |
| WO2016029838A1 (en) | Method and device for mimo communication data transmission | |
| CN102340341A (en) | Multi-antenna signal processing method and device for uplink system | |
| Singal et al. | Performance analysis of MIMO-OFDM system using SLM with additive mapping and U2 phase sequence for PAPR reduction | |
| CN102761355A (en) | Method and device for communication of control channel | |
| CN104079306A (en) | Operation method of receiver and signal receiving equipment | |
| CN102111364B (en) | Single-antenna orthogonal frequency division multiplexing-based spectral domain signal transmission device and method | |
| CN109728840B (en) | Data transmission method and device | |
| Li et al. | A low complexity transmitter architecture and its application to PAPR reduction in SFBC MIMO-OFDM systems | |
| CN102065047A (en) | Transmitting method and device of double-transmitting-antenna OFDM (Orthogonal Frequency Division Multiplexing) signals | |
| Suhagiya et al. | Design and implementation of OFDM transmitter and receiver using 8-point FFT/IFFT | |
| CN104579580A (en) | Data stream transmitting method and device for MIMO (multiple input multiple output) system | |
| CN113645035B (en) | Physical layer secure transmission method, system, device and computer readable storage medium | |
| CN102571678A (en) | Selection method and device for time-domain alternative signals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141126 |