CN108768485A - A kind of wireless communications method of multi-way signal multiplexing transmission - Google Patents
A kind of wireless communications method of multi-way signal multiplexing transmission Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0426—Power distribution
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Abstract
The present invention provides a kind of wireless communications method of multi-way signal multiplexing transmission, and in transmitting terminal, original information bits form N circuit-switched datas, each circuit-switched data is the linear superposition of symbol by serial to parallel conversion, symbol mapping, precoding；Either frequency domain is periodical or acyclic waveform transmits by the parallel roads N time domain for N circuit-switched datas, has between waveform overlapping；In receiving terminal, the signal received is sampled according to certain sample rate, independence or joint-detection and decoding are carried out to the roads N signal, information bit is obtained, completes the reception of data.The wireless communications method of multi-way signal multiplexing transmission of the present invention, by multiple parallel time domains, either frequency-domain waveform transmits multichannel data to transmitting terminal to single or multiple receivers, can be obviously improved the capacity and spectrum efficiency of system；When multiple transmitters transmit multichannel data to receiver by multiple parallel time domains or frequency-domain waveform, it can equally be obviously improved the capacity and spectrum efficiency of system.
Description
Technical field
The invention belongs to wireless communication technology fields, and in particular to a kind of side wireless communication of multi-way signal multiplexing transmission
Method.
Background technology
In existing communication system, in the resources such as frequency, from transmitting terminal to receiving terminal, can only there is one at the same time
A signal code is transmitted.If there is multiple symbols simultaneously or with keep pouring in it is defeated if, prodigious interference is had between symbol.When
When base station needs to send or receive the information of different users, different users is needed to be split in resource, to
Eliminate or reduce interference.
Current multiple access technology includes mainly following several：Frequency division multiple access (FDMA) technology, each user use difference
The channel of frequency, so not interfering with mutually, the mobile communication of early stage is exactly to use this technology；Time division multiple acess (TDMA) skill
Art, multiple users are used in conjunction with a channel, but the time occupied is different, so will not interfere between each other, it is clear that in phase
In the case of cochannel number, more users can be accommodated than frequency division multiple access using time division multiple acess；CDMA (CDMA) technology：
Each user is assigned, and there are one unique " code sequences ", since all " code sequence " is different from, so each user's phase
It is not interfered with substantially between mutually yet；Space division multiple access (SDMA) technology, is the technology that different channels are constituted using space segmentation, than
If base station is using the wave beam of multi-antenna technology formation mutiple antennas, the user of different beams can use identical frequency the same time
Rate is carried out at the same time communication, will not form interference each other.
In order to cope with the following communication scenes connected greatly, the orthogonal access way of current mainstream faces prodigious pressure.?
In the standardization effort of 5G, more companies propose non-orthogonal scheme, such as SCMA, PDMA, but the frequency spectrum of these schemes
Efficiency is generally relatively low.
In addition, single antenna is sent in the communication system of single antenna reception, the upper bound of channel capacity is the capacity that Shannon provides
Formula, C=W*log2 (1+SNR), W are channel width, and SNR is the ratio for receiving signal and noise, in order to promote channel capacity,
It needs to increase W, or promotes SNR.Multi-antenna technology is then the multiple numbers of mutiple antennas simultaneous transmission using the machine that sends and receives
Carry out hoist capacity according to stream.In above-mentioned technology, promotes channel capacity and need to increase the mode of W, SNR or antenna number, this needs
More resources and cost.
(1) the technical issues of solving
The invention aims to overcome the defect problem of the above-mentioned prior art, a kind of multi-way signal multiplexing transmission is provided
Wireless communications method, realize multiple information symbols superposed transmission on the same resource；When single transmitter is sent data to
Multiple receivers or when receiving data from multiple receivers, or when single transmitter sends data to single receiver,
It can be with the capacity of lifting system.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs：
A kind of wireless communications method of multi-way signal multiplexing transmission, in transmitting terminal：The information ratio of one or more user
Spy passes through serial to parallel conversion, becomes the parallel data in the roads M, and then each circuit-switched data carries out the mapping of symbol, become the roads M plural number or
The numerical chracter S of real number1, S2,..,SM；M railway digital symbols carry out precoding, shape by transmitting terminal pre-coding matrix (N multiplies M dimensions)
At N channel parallel datas (N is more than or equal to M), each circuit-switched data is symbol S1, S2,..,SMLinear superposition；N circuit-switched datas are by parallel
The roads N time domain either frequency domain is periodical or the transmission of acyclic waveform, have between waveform overlapping；Transmitting terminal is to per wave all the way
The power of shape will also carry out appropriate configuration；In receiving terminal：The signal received is sampled according to certain sample rate, to N
Road signal carries out independence or joint-detection and decoding, obtains information bit, completes the reception of data；The wireless communication includes
Single transmitter sends multiple signals and sends multiple signals to multiple receivers or multiple to single receiver or single transmitter
Transmitter sends multiple signals and sends multiple signals to multiple receivers to single receiver or multiple transmitters.
Further, the information bit of the transmitting terminal is that the original information bits of one or more user are either logical
Cross the digital bit of channel coding and/or interleaving treatment.
Further, the roads N waveform has a delay in regular hour or frequency between each other, the roads I in N circuit-switched datas
Part and the roads Q part carry out digital to analog conversion again and are sent by simulation and radio circuit respectively.
Further, the delay between the parallel data number of plies M, the number N of waveform, waveform on time or frequency
Etc. information receiving terminal is informed by transmitting terminal, or pattern configurations appointed according to transmitting terminal and receiving terminal, different wave is sent
Signal be sent to same or multiple and different receivers.
Further, what the transmitting terminal can be periodically or non-periodically sends reference signal, hair in time domain or frequency domain
The reference signal of sending end includes mode 1, mode 2, mode 3；The mode 1, reference signal only on waveform all the way periodically or
Person's aperiodicity sending, other road waveforms are not sent in this resource；The mode 2, the sending cycle on per waveform all the way
Or aperiodicity reference signal, it does not interfere between each other；The mode 3, on per waveform all the way sending cycle or
Aperiodicity reference signal has overlapping between multichannel reference signal.
Further, when single transmitter sends multiple signals, the encoder matrix that the N multiplies M includes the volume that N multiplies M dimensions
Code matrix P1, matrix H are the matrix that a N multiplies N-dimensional, and H=T*P, matrix T are that N multiplies N-dimensional matrix, for example nonzero element is all 1
Lower triangular matrix, diagonal matrix P are the power distribution matrix of N number of waveform, and the ratio of any two diagonal element square is equal to pair
The ratio between waveform power answered does SVD decomposition to H, and H=UDV, D are diagonal matrix, and diagonal element is the singular value of H, and U and V are tenth of the twelve Earthly Branches square
Battle array, P1 are that the M that the corresponding M rows of maximum M singular value are constituted in matrix V multiplies the N that N-dimensional matrix obtains and multiplies the matrix that M is tieed up, such as
By the method for conjugate transposition, when multiple transmitters send multiple signals, the encoder matrix that N multiplies M dimensions is the unit matrix that N multiplies N.
Further, described in receiving terminal, sampled value of the docking collection of letters number on time domain or frequency domain sample, each waveform
At least one, a received signal vector y is obtained, when y is the vector that N multiplies 1 dimension, N-dimensional is multiplied to one M of y vectors premultiplication and is compiled
Code matrix P2 obtains new vectorial y ', then recovers transmission signal from vectorial y ' again.
Further, the encoder matrix of the receiving terminal includes the encoder matrix P2 that M multiplies N-dimensional, and matrix H is that a N multiplies N-dimensional
Matrix, H=T*P, matrix T are that N multiplies N-dimensional matrix, for example nonzero element is all 1 lower triangular matrix, and diagonal matrix P is N number of
The ratio of the power distribution matrix of waveform, any two diagonal element square is equal to the ratio between corresponding waveform power, and SVD is to H
It decomposes, H=UDV, D are diagonal matrix, and diagonal element is the singular value of H, and U and V are unitary matrice, and P2 is maximum M in matrix U
The N that the corresponding M row of singular value are constituted multiplies the M that M dimension matrixes obtain and multiplies the matrix of N-dimensional, for example passes through conjugate transposition.
Further, when single transmitter sends multiple signals to single receiver, receiver detects all roads M
Data；When transmitter sends multiple signals to multiple receivers, each receiver is according to the instruction of transmitting terminal or and sends
The agreement at end selects one's own data from M circuit-switched datas.
Further, matrix T depends on the relative position relation of N number of waveform, for arbitrary waveform sequence, matrix T's
It is defined as follows, n-th (n=1,2 ..., N) in N number of sampling is if including jth (j=1,2 ..., N) a wave inside a sampled value
The signal of shape is then 1 in j-th of element value of the line n of matrix T, other elements value 0,
When N number of waveform postpones in order, up front, for n-th waveform backmost, T is nonzero element to first waveform
For 1 lower triangular matrix
T=[1,0 ..., 0；1,1,0,…,0；1,1,1,0,…,0；…………………；1,1,1,…,1]；
When N number of waveform postpones in reverse order, up front, for the 1st waveform backmost, T is that nonzero element is to n-th waveform
1 upper triangular matrix
T=[1,1 ..., 1；0,1,1,…,1；0,0,1,1,…,1；…………………；0,0,…,0,1].
(3) advantageous effect
Beneficial effects of the present invention：A kind of wireless communications method of multi-way signal multiplexing transmission, transmitting terminal by it is multiple simultaneously
Either frequency-domain waveform transmits multichannel data to capable time domain to single or multiple receivers, can be obviously improved the capacity of system
And spectrum efficiency；When multiple transmitters transmit multichannel data to receiver by multiple parallel time domains or frequency-domain waveform,
The capacity and spectrum efficiency of system can be equally obviously improved.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the method for the present invention transmitting terminal functional block diagram；
Fig. 2 is the method for the present invention receiving terminal functional block diagram；
Fig. 3 is transmitting terminal reference signal design mode 1；
Fig. 4 is transmitting terminal reference signal design mode 2；
Fig. 5 is transmitting terminal reference signal design mode 3；
Fig. 6 is the system spectral efficiency curve graph under different waveform number of plies N.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
A kind of wireless communications method of multi-way signal multiplexing transmission combined with Figure 1 and Figure 2, using multiple information symbols in phase
The communication of superposed transmission in same resource, resource includes time, frequency etc..
In transmitting terminal, original information bits (or information bit after coding) pass through serial to parallel conversion, become the roads M
Parallel data, then the mapping of each circuit-switched data progress symbol, becomes the numerical chracter S of the roads M plural number or real number1, S2,..,
SM；M railway digital symbols carry out precoding by transmitting terminal pre-coding matrix (N multiplies M dimensions), form N circuit-switched datas, each circuit-switched data is
Symbol S1, S2,..,SMLinear superposition；Either frequency domain is periodical or acyclic wave by the parallel roads N time domain for N circuit-switched datas
Shape transmits, and has between waveform overlapping, and M is less than or equal to N；Transmitting terminal will also carry out appropriate configuration to the power per waveform all the way.
In receiving terminal, by time domain to signal or frequency domain sampling and transmitting terminal is recovered per letter all the way with corresponding receiving algorithm
Breath.It needs the signal to receiving to be sampled according to certain sample rate, independence or joint-detection are carried out to the roads N signal and translates
Code, obtains information bit, completes the reception of data.
Present invention wireless communication is suitable for following scene：1) single transmitter sends multiple signals to single receiver；2)
Single transmitter sends multiple signals to multiple receivers；3) multiple transmitters send multiple signals to single receiver；4) more
A transmitter sends multiple signals to multiple receivers.
Information bit be one or more user original information bits either by channel coding and/or intertexture at
The digital bit of reason.Information bit carries out serial to parallel conversion, is converted into M channel parallel datas, and each circuit-switched data carries out digital modulation, adjusts
A series of numerical chracters are made.Transmitting terminal informs the number of plies where its data of receiving terminal, or pre- according to transmitting terminal and receiving terminal
The mode first appointed is sent.
Parameter M is flexible configuration according to specific circumstances, for example the signal strength information based on receiving terminal feedback, is based on
Measurement result for uplink signal, the number N based on transmitting terminal digital waveform, or the M based on receiving terminal feedback are built
View.The parallel roads M signal is periodical or acyclic waveform transmits by the parallel roads N, and M is less than or equal to N, per road waveform
The identical either different multidiameter delay waveforms of power are overlapped in time domain or frequency domain according to the delay of regular hour or frequency
Together.
The roads N waveform has a delay in regular hour or frequency between each other, the roads I part and the roads Q part in N circuit-switched datas
Digital to analog conversion is carried out respectively again and is sent by simulation and radio circuit.Number N, the waveform of parallel data number of plies M, waveform
Between the information such as delay on time either frequency informed receiving terminal by transmitting terminal or arranged according to transmitting terminal and receiving terminal
Good pattern configurations, the signal that different wave is sent are sent to same or multiple and different receivers.
The parallel complex symbol in the roads M passes through the encoder matrix of a N*M, obtains the parallel complex symbol output in the roads N, each
The symbol on road is divided into the road I, Q, and each roads I or the roads Q signal are transmitted by a waveform.When single transmitter sends N ways
When according to single receiver or multiple and different receivers, together with roads I in the roads N and the roads Q Signal averaging, as total I
(Q) then road signal respectively carries out the roads I and the roads Q signal the transformation of digital to analogy, then by simulation and radio circuit hair
It sees off.When multiple transmitters send N circuit-switched datas, the roads I and the roads Q signal in each transmitter carry out number and arrive respectively
Then the transformation of simulation is sent by simulation and radio circuit.
When single transmitter sends multiple signals, the encoder matrix that the N multiplies M includes the encoder matrix P1 that N multiplies M dimensions,
Matrix H is the matrix that a N multiplies N-dimensional, and H=T*P, matrix T are the matrixes that N multiplies N-dimensional, for example nonzero element is all 1 lower triangle
Matrix, diagonal matrix P is the power distribution matrix of N number of waveform, and the ratio of any two diagonal element square is equal to corresponding wave
Shape power ratio.SVD decomposition is done to H, H=UDV, D are diagonal matrix, and diagonal element is the singular value of H, and U and V are unitary matrice, P1
It is that the corresponding M rows of maximum M singular value are constituted in matrix V M multiplies the N that N-dimensional matrix obtains and multiplies the matrix of M dimensions, for example passes through
The method of conjugate transposition.
When multiple transmitters send multiple signals, the encoder matrix that N multiplies M dimensions is the unit matrix that N multiplies N.
In receiving terminal, sampled value of the docking collection of letters number on time domain or frequency domain sample, each waveform is at least one, such as
Shown in Fig. 2, obtain a received signal vector y, when y is the vector that N multiplies 1 dimension, such as y=[y1, y2, y3, y4] ', to y to
Amount one M of premultiplication multiplies N-dimensional matrix P2 and obtains new vectorial y ', then recovers transmission signal from vectorial y ' again.Matrix H is one
N multiplies the matrix of N-dimensional, H=T*P, and matrix T is that N multiplies N-dimensional matrix, for example nonzero element is all 1 lower triangular matrix, diagonal matrix P
Ratio for the power distribution matrix of N number of waveform, any two diagonal element square is equal to the ratio between corresponding waveform power.To H
SVD decomposition is done, H=UDV, D are diagonal matrix, and diagonal element is the singular value of H, and U and V are unitary matrice, and P2 is the maximum in matrix U
The N that constitutes of M singular value corresponding M row multiply the matrix that the M that M dimension matrixes obtain multiplies N-dimensional.
Above-mentioned matrix T is defined as follows, and n-th (n=1,2 ..., N) in N number of sampling is if including the inside a sampled value
The signal of j (j=1,2 ..., N) a waveform is then 1 in j-th of element value of the line n of matrix T, other elements value 0,
When N number of waveform postpones in order, up front, for n-th waveform backmost, T is nonzero element to first waveform
For 1 lower triangular matrix
T=[1,0 ..., 0；1,1,0,…,0；1,1,1,0,…,0；…………………；1,1,1,…,1]；
When N number of waveform postpones in reverse order, up front, for the 1st waveform backmost, T is that nonzero element is to n-th waveform
1 upper triangular matrix
T=[1,1 ..., 1；0,1,1,…,1；0,0,1,1,…,1；…………………；0,0,…,0,1].
When single transmitter sends multiple signals to single receiver, receiver detects all M circuit-switched datas；Work as hair
When machine being sent to send multiple signals to multiple receivers, each receiver according to the instruction of transmitting terminal or with the agreement of transmitting terminal,
One's own data are selected from M circuit-switched datas.
Transmitting terminal is adjusted the power of each waveform in N number of waveform, and transmitting terminal is for each on the signal of the roads M
The power of road signal is also adjusted.
Due to the time-varying characteristics of wireless channel, transmission reference signal that transmitting terminal can be periodically or non-periodically.Transmitting terminal
Reference signal design can have following mode：Mode 1 as shown in Figure 3, reference signal only on waveform all the way periodically or
Person's aperiodicity sending, other road waveforms are not sent in this resource；Mode 2 as shown in Figure 4, sends week on per waveform all the way
Phase property or aperiodicity reference signal, do not interfere between each other；Mode 3 as shown in Figure 5, sends week on per waveform all the way
Phase property or aperiodicity reference signal have overlapping between multichannel reference signal.
As shown in fig. 6, when single transmitter sends data to single receiver, different waveform number of plies N is for system frequency
The influence of spectrum efficiency.Work as N=1, the relationship of the spectrum efficiency and signal-to-noise ratio of corresponding traditional single-input single-output channel (SISO).
N=3 and N=6 corresponds to the performance of technical solution of the present invention.As can be seen that in the case where not increasing antenna number, the frequency spectrum of system
Efficiency has greatly improved than traditional SISO channels.Such as when signal-to-noise ratio is 30dB, N=3 systems and N=6 systems
Spectrum effect improves 125% and 260% respectively than N=1 system.Demonstrate the validity of technical solution of the present invention.
In conclusion the embodiment of the present invention, the wireless communications method of multi-way signal multiplexing transmission, transmitting terminal by it is multiple simultaneously
Either frequency-domain waveform transmits multichannel data to capable time domain to single or multiple receivers, can be obviously improved the capacity of system
And spectrum efficiency；When multiple transmitters transmit multichannel data to receiver by multiple parallel time domains or frequency-domain waveform,
The capacity and spectrum efficiency of system can be equally obviously improved.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these modification or
It replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of wireless communications method of multi-way signal multiplexing transmission, which is characterized in that in transmitting terminal：One or more user
Information bit pass through serial to parallel conversion, become the parallel data in the roads M, then each circuit-switched data carries out the mapping of symbol, becomes the roads M
The numerical chracter S of plural number or real number1, S2,..,SM；M railway digital symbols are carried out by transmitting terminal pre-coding matrix (N multiplies M dimensions)
Precoding forms N channel parallel datas, and N is more than or equal to M, and each circuit-switched data is symbol S1, S2,..,SMLinear superposition；N ways
According to by the parallel roads N time domain, either frequency domain is periodical or acyclic waveform transmits, have between waveform overlapping；Transmitting terminal pair
Appropriate configuration is also carried out per the power of waveform all the way；In receiving terminal：The signal received is carried out according to certain sample rate
Sampling carries out independence or joint-detection and decoding to the roads N signal, obtains information bit, complete the reception of data；It is described wireless
Communication includes that single transmitter sends multiple signals to single receiver or single transmitter transmission multiple signals to multiple receptions
Machine or multiple transmitters send multiple signals and send multiple signals to multiple receivers to single receiver or multiple transmitters.
2. a kind of wireless communications method of multi-way signal multiplexing transmission as described in claim 1, it is characterised in that：The transmission
The information bit at end is the original information bits of one or more user either by channel coding and/or interleaving treatment
Digital bit.
3. a kind of wireless communications method of multi-way signal multiplexing transmission as claimed in claim 1 or 2, which is characterized in that the N
The overlapping waveform in road has a delay in regular hour or frequency between each other, and the roads I part and the roads Q part be again in N circuit-switched datas
Digital to analog conversion is carried out respectively and is sent by simulation and radio circuit.
4. a kind of wireless communications method of multi-way signal multiplexing transmission as claimed in claim 3, which is characterized in that described parallel
Delay information between data number of plies M, the number N of waveform, waveform on time or frequency informs receiving terminal by transmitting terminal, or
The pattern configurations that person appoints according to transmitting terminal and receiving terminal, different wave send signal be sent to it is same or it is multiple not
Same receiver.
5. a kind of wireless communications method of multi-way signal multiplexing transmission as described in claim 1, which is characterized in that the transmission
End can periodically or non-periodically send reference signal in time domain or frequency domain, the reference signal of transmitting terminal includes mode 1, side
Formula 2, mode 3；The mode 1, only periodicity or aperiodicity sending, other road waveforms on waveform all the way exist reference signal
It is not sent in this resource；The mode 2, sending cycle or aperiodicity reference signal on per waveform all the way, mutually it
Between do not interfere with；The mode 3, sending cycle or aperiodicity reference signal on per waveform all the way, multichannel is with reference to letter
There is overlapping between number.
6. a kind of wireless communications method of multi-way signal multiplexing transmission as described in claim 1, which is characterized in that when single hair
When machine being sent to send multiple signals, the encoder matrix that the N multiplies M includes the encoder matrix P1 that N multiplies M dimensions, and matrix H is that a N multiplies N-dimensional
Matrix, H=T*P, matrix T are that N multiplies N-dimensional matrix, and diagonal matrix P is the power distribution matrix of N number of waveform, and any two is diagonal
The ratio of element square is equal to the ratio between corresponding waveform power, does SVD decomposition to H, H=UDV, D are diagonal matrix, and diagonal element is
The singular value of H, U and V are unitary matrice, and P1 is that the M of the corresponding M rows composition of maximum M singular value in matrix V multiplies N-dimensional matrix and obtains
To N multiply the matrixes of M dimensions, when multiple transmitters send multiple signals, the encoder matrix that N multiplies M dimensions is that N multiplies the unit matrix of N.
7. a kind of wireless communications method of multi-way signal multiplexing transmission as described in claim 1, which is characterized in that described to connect
Receiving end, sampled value of the docking collection of letters number on time domain or frequency domain sample, each waveform are at least one, obtain one and receive letter
Number vector y multiplies N-dimensional encoder matrix P2 to one M of y vectors premultiplication and obtains new vectorial y ', so when y is the vector that N multiplies 1 dimension
Afterwards transmission signal is recovered from vectorial y ' again.
8. a kind of wireless communications method of multi-way signal multiplexing transmission as claimed in claim 7, which is characterized in that the reception
The encoder matrix at end includes the encoder matrix P2 that M multiplies N-dimensional, and matrix H is the matrix that a N multiplies N-dimensional, and H=T*P, matrix T are that N multiplies N
Matrix is tieed up, diagonal matrix P is the power distribution matrix of N number of waveform, and the ratio of any two diagonal element square is equal to corresponding
The ratio between waveform power does SVD decomposition to H, and H=UDV, D are diagonal matrix, and diagonal element is the singular value of H, and U and V are unitary matrice,
P2 is that the N that the corresponding M row of maximum M singular value in matrix U are constituted multiplies the matrix that the M that M dimension matrixes obtain multiplies N-dimensional.
9. a kind of wireless communications method of multi-way signal multiplexing transmission as claimed in claim 7 or 8, which is characterized in that work as list
When a transmitter sends multiple signals to single receiver, receiver detects all M circuit-switched datas；When transmitter sends multichannel
When signal gives multiple receivers, each receiver according to the instruction of transmitting terminal or with the agreement of transmitting terminal, selected from M circuit-switched datas
Select one's own data.
10. a kind of wireless communications method of multi-way signal multiplexing transmission as described in claim 6 or 8, which is characterized in that matrix
T depends on the relative position relation of N number of waveform, and for arbitrary waveform sequence, matrix T is defined as follows, and the in N number of sampling
N (n=1,2 ..., N) is if include the signal of jth (j=1,2 ..., N) a waveform, then the n-th of matrix T inside a sampled value
J-th capable of element value is 1, other elements value 0,
When N number of waveform postpones in order, up front, for n-th waveform backmost, T is that nonzero element is 1 to first waveform
Lower triangular matrix
T=[1,0 ..., 0；1,1,0,…,0；1,1,1,0,…,0；…………………；1,1,1,…,1]；
When N number of waveform postpones in reverse order, up front, for the 1st waveform backmost, T is that nonzero element is 1 to n-th waveform
Upper triangular matrix
T=[1,1 ..., 1；0,1,1,…,1；0,0,1,1,…,1；…………………；0,0,…,0,1].
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114666012A (en) * | 2022-03-28 | 2022-06-24 | 电子科技大学 | MPA-based multi-sampling-point joint detection SCMA detection method |
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