CN104270235B - The data transmission method of transceiver under a kind of two cells multi-user's Two-Hop - Google Patents
The data transmission method of transceiver under a kind of two cells multi-user's Two-Hop Download PDFInfo
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- CN104270235B CN104270235B CN201410473162.7A CN201410473162A CN104270235B CN 104270235 B CN104270235 B CN 104270235B CN 201410473162 A CN201410473162 A CN 201410473162A CN 104270235 B CN104270235 B CN 104270235B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
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Abstract
The present invention relates to communication technical field, a kind of data transmission method of transceiver under two cells multi-user's Two-Hop is disclosed, including：In different time slots, server controls source node group alternately data are sent, and according to the difference for the source node group that data are sent in different time-gap, adjust the transmitting-receiving order that half-duplex relay node sends data to the source node group, via node obtains the local channel status information of oneself by channel estimation, while data forwarding is carried out, the frequency pilot sign after precoding processing is transmitted；Destination node decodes expected data according to the equivalent channel matrix estimated.The method provided using the present invention, source node group, via node, destination node need not know the channel information of the overall situation, the computation complexity of destination node can be reduced under conditions of the specified free degree is reached using local channel information, more preferable free degree performance can be obtained using more time interval resources.
Description
Technical field
The present invention relates to communication technical field, the data of transceiver under more particularly to a kind of two cells multi-user's Two-Hop
Transmission method.
Background technology
With continuing to develop for the communication technology, the design of the relay transport protocol under two cell multi-user's Two-Hops has
Significance.
Current scheme includes：For two cell multi-user's Two-Hops, there is M single-antenna subscriber in each source node group
And relaying and destination node configure M root antennas, the free degree number that current relay transport protocol can reach isWhen
When via node does not have any global CSI, the decoding complex degree of destination node is higher；When via node only has the first jump
During global CSI, the decoding complex degree of destination node can be reduced.
However, existing two via nodes of relay transport protocol need to obtain the channel of the first hop channel by channel estimation
After status information CSI, the mutual CSI of interaction, in the case where two via nodes are provided with the global CSI of the first jump,
It can realizeThe individual normalization free degree, and existing relay transport protocol is only capable of realizationThe individual normalization free degree, and purpose
The decoding complex degree of node is higher.
The content of the invention
(1) technical problem solved
Present invention solves the technical problem that being：The decoding that destination node how is reduced while obtaining and specifying the free degree is answered
Miscellaneous degree, improves the normalization free degree in addition.
(2) technical scheme
The invention provides a kind of data transmission method of transceiver under two cells multi-user's Two-Hop, this method includes
Following steps：
In different time slots, server controls source node group alternately data are sent, and are sent according in different time-gap
The difference of the source node group of data, adjustment half-duplex relay node sends the transmitting-receiving order of data to the source node group, described
Source node group multiple single-antenna subscribers in two cells are constituted；
The half-duplex relay node obtains the local channel status information of oneself by channel estimation；
The half-duplex relay node generates leading for the half-duplex relay node according to the local channel status information
Frequency symbol, and destination node will be sent in the data of frequency pilot sign insertion current transmission；
Destination node extracts the frequency pilot sign received in data, and equivalent channel matrix is carried out according to the frequency pilot sign
Estimation, expected data is decoded according to the equivalent channel matrix estimated.
Further, methods described includes two groups of source node groups, two half-duplex relay nodes and is made up of base station
Two destination nodes；Wherein, SiRepresent source node group i, i ∈ { 1,2 }, RlRepresent via node l, the l ∈ of configuration M root antennas
{ 1,2 }, DiRepresent destination node i, S with M root antennasiIn have M single-antenna subscriber, in k-th of time slot, SiIn
After node RlTo its corresponding destination node DiTransmit data s[k]。
Further, the server controls source node group carries out data transmission, and sends data according in different time-gap
Source node group difference, adjustment half-duplex relay node to the source node group send data transmitting-receiving order, specifically include：
In the 1st time slot, two via node R1And R2Receive source node group S1The number sent to two via nodes
According to s[1], two via node R1And R2The signal received is respectively：
r[1][1]=Η[1,1][1]s[1]+z[1],
r[2][1]=Η[2,1][1]s[1]+z[2],
Wherein, r[l][k] represents via node RlThe signal received in k-th of time slot, Η[l,i]When [k] is k-th
Source node group S in gapiTo via node RlChannel matrix, z[l]For via node RlNoise vector, because noise does not influence
Ignore noise item in the calculating of the free degree, follow-up formula；
After the end of transmission of 1st time slot, via node R1And R2It is utilized respectively ZF decoding matrix Η[1,1][1]-1With
Η[2,1][1]-1Calculated, obtain s[1]。
Further, the server controls source node group carries out data transmission, and sends data according in different time-gap
Source node group difference, adjustment half-duplex relay node to the source node group send data transmitting-receiving order, in addition to：
In the 2nd time slot, R1It is transmitted and R2Received, R1Transmit the data s that the 1st slot decoder goes out[1], together
When source node group S2Transmit data s[2], the via node R2The data received, are expressed as follows：
r[2][2]=F[2,1][2]s[1]+Η[2,2][2]s[2],
Wherein, F[2,1][k] is R in k-th of time slot1To R2Channel matrix；
In via node R2, construct following matrix equation：
Wherein, Η[2,1][1]、F[2,1][2] and Η[2,2][2] be all order be M non-singular matrix,For its equivalent matrix,
Order is 2M；
The via node R2Utilize ZF decoding matrixCalculated, obtain s[1]And s[2]。
Further, methods described also includes：
According to via node R2The s obtained in the 1st time slot[1], utilize r[2][2]-F[2,1][2]s[1]Eliminate r[2]
[2] s in[1]The interference brought, specific formula is：
r[2][2]-F[2,1][2]s[1]=Η[2,2][2]s[2]；
The via node R2Utilize ZF decoding matrix Η[2,2][2]-1Calculated, obtain s[2]。
Further, the equivalent channel matrix that the basis is estimated decodes expected data and specifically included：
In the 2nd time slot, destination node D1And D2The data that via node is sent are received, the data received
Respectively
y[1][2]=G[1,1][2]s[1],
y[2][2]=G[2,1][2]s[1],
Wherein, y[i][k] is destination node D in k-th of time slotiThe data received, G[i,l][k] be in k-th time slot in
After node RlTo destination node DiChannel matrix；
Destination node D1And D2It is utilized respectively ZF decoding matrix G[1,1][2]-1With G[2,1][2]-1Calculated, obtain s[1]。
Further, the server controls source node group carries out data transmission, and sends data according in different time-gap
Source node group difference, adjustment half-duplex relay node to the source node group send data transmitting-receiving order, in addition to：
In the 3rd time slot, via node R2It is transmitted and R1Received, R2Transmit s[2], while source node group S1
Transmit data s[3], in the 3rd time slot, via node R1The signal received can be expressed as：
r[1][3]=F[1,2][3]s[2]+Η[1,1][3]s[3],
Wherein, F[1,2][k] is R in k-th of time slot2To R1Channel matrix；
In the 3rd time slot, R2To destination node D2Send s[2]；
In the 4th time slot, via node R1It is transmitted and R2Received, R1Transmit the letter that the 3rd time slot is received
Number r[1][3], while source node group S2Transmit data s[4], in the 4th time slot, via node R2The signal received can be expressed as：
r[2][4]=F[2,1][4]r[1][3]+Η[2,2][4]s[4]
=F[2,1][4](F[1,2][3]s[2]+Η[1,1][3]s[3])+Η[2,2][4]s[4]；
In the 5th time slot, via node R2It is transmitted and R1Received, R2Transmit the signal that the 4th time slot is received
r[2][4], while source node group S1Transmit data s[5], in the 5th time slot, via node R1The signal received can be expressed as：
r[1][5]=F[1,2][5]r[2][4]+Η[1,1][5]s[5]
=F[1,2][5]F[2,1][4]F[1,2][3]s[2]+F[1,2][5]F[2,1][4]Η[1,1][3]s[3]+Η[1,1][5]s[5]；
In the 6th time slot, via node R1It is transmitted and R2Received, R1Transmit the signal r that the 5th time slot is received[1][5], while source node group S2Transmit data s[6]；
Using nibbling method, in different time slots, via node carries out the transmitting-receiving of data successively.
Further, the equivalent channel matrix that the basis is estimated, which decodes expected data, also to be included：
In the 3rd time slot, two destination node D1And D2The signal received can be expressed as：
y[1][3]=G[1,2][3]s[2],
y[2][3]=G[2,2][3]s[2],
Destination node D1And D2It is utilized respectively ZF decoding matrix G[1,2][3]-1And G[2,2][3]-1S can be obtained[2]；
In the 4th time slot, two destination node D1And D2The signal received can be expressed as：
y[1][4]=G[1,1][4]r[1][3]=G[1,1][4](F[1,2][3]s[2]+Η[1,1][3]s[3]),
y[2][4]=G[2,1][4]r[1][3]=G[2,1][4](F[1,2][3]s[2]+Η[1,1][3]s[3]),
Destination node D1Utilize y[1][3] and y[1][4] following matrix equation is constructed：
Wherein, equivalent channel matrixOrder be 2M；
Destination node D1Utilize ZF decoding matrixCalculated, obtain s[3]；
For destination node D2, utilize destination node D1Coding/decoding method obtain s[3]；
In the 5th time slot, two destination node D1And D2The signal received can be expressed as：
y[1][5]=G[1,2][5]r[2][4]
=G[1,2][5](F[2,1][4]F[1,2][3]s[2]+F[2,1][4]Η[1,1][3]s[3]+Η[2,2][4]s[4])：
y[2][5]=G[2,2][5]r[2][4]
=G[2,2][5](F[2,1][4]F[1,2][3]s[2]+F[2,1][4]Η[1,1][3]s[3]+Η[2,2][4]s[4])：
Destination node D1Utilize y[1][3]、y[1][4] and y[1][5] following matrix equation is constructed：
Wherein, equivalent channel matrixOrder be 3M；
Destination node D1Utilize ZF decoding matrixCalculated, obtain s[4]；
For destination node D2, utilize destination node D1Coding/decoding method obtain s[4]；
In the 6th time slot, destination node D1And D2Using corresponding ZF decoding matrix decode obtaining s[5]；
Utilize nibbling method, destination node D1And D2Decoded successively.
Further, the destination node D in the 4th time slot1Decode s[3]Method also include：
According to D1The s obtained in the 3rd time slot[2], utilize y[1][4]-G[1,1][4]F[1,2][3]s[2]Eliminate y[1][4]
Middle s[2]The interference brought；
Use ZF decoding matrix (G[1,1][4]Η[1,1][3])-1Calculated, obtain s[3]。
Further, the destination node D in the 5th time slot1Decode s[4]Method also include：
According to D1The s obtained in time slot above[2]And s[3], utilize y[1][5]-G[1,2][5]F[2,1][4]F[1,2]
[3]s[2]-G[1,2][5]F[2,1][4]Η[1,1][3]s[3]Eliminate y[1][5] s in[2]And s[3]The interference brought；
Use ZF decoding matrix (G[1,2][5]Η[2,2][4])-1Calculated, obtain s[4]。
The data transmission method of transceiver under a kind of two cells multi-user's Two-Hop that the present invention is provided, does not require that source is saved
Point and relaying have global channel status information CSI, so that it may reachThe individual normalization free degree, and reachingIndividual normalization
Decoding complex degree of the existing relay transport protocol in destination node can be significantly reduced during the free degree.In addition, what the present invention was provided
The data transmission method of transceiver can when that need not relay and have overall situation CSI with source node under two cell multi-user's Two-Hops
Using the asymptotic value of the normalization free degree that reaches as 1.
Brief description of the drawings
Fig. 1 is the flow of the data transmission method of transceiver under a kind of two cells multi-user's Two-Hop proposed by the present invention
Figure；
Fig. 2 is answering for two cell multi-user's Two-Hops based on half-duplex relay node that the embodiment of the present invention one is provided
Use schematic diagram of a scenario；
Fig. 3 is the system model figure that the embodiment of the present invention one is provided；
Fig. 4 is reaching for the offer of the embodiment of the present invention oneThe data transmission procedure signal of transceiver during the individual free degree
Figure；
Fig. 5 is that the data transmission procedure of transceiver when reaching 1 normalization free degree that the embodiment of the present invention two is provided shows
It is intended to.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
The embodiment of the present invention one proposes a kind of data transmission method of transceiver under two cells multi-user's Two-Hop, such as
Shown in Fig. 1, it the described method comprises the following steps：
S101. in different time slots, server controls source node group alternately data are sent, and according in different time-gap
The difference of the source node group of data is sent, adjustment half-duplex relay node sends the transmitting-receiving order of data to the source node group,
The source node group multiple single-antenna subscribers in two cells are constituted；
S102. the half-duplex relay node obtains the local channel status information of oneself by channel estimation；
S103. the half-duplex relay node generates the half-duplex relay node according to the local channel status information
Frequency pilot sign, and will the frequency pilot sign insertion current transmission data in be sent to destination node；
S104. destination node extracts the frequency pilot sign received in data, and equivalent letter is carried out according to the frequency pilot sign
Road Matrix Estimation, expected data is decoded according to the equivalent channel matrix estimated.
Further, methods described includes two groups of source node groups, two half-duplex relay nodes and is made up of base station
Two destination nodes；Wherein, SiRepresent source node group i, i ∈ { 1,2 }, RlRepresent via node l, the l ∈ of configuration M root antennas
{ 1,2 }, DiRepresent destination node i, S with M root antennasiIn have M single-antenna subscriber, in k-th of time slot, SiIn
After node RlTo its corresponding destination node DiTransmit data s[k]。
Realized to solve prior artThe problem of decoding complex degree of destination node is higher during the individual normalization free degree,
The two cell multi-users of source node and relaying with global channel status information CSI are not required the embodiments of the invention provide a kind of
The data transmission method of transceiver under Two-Hop, the application scenarios schematic diagram of this method is as shown in Fig. 2 system model figure is as schemed
Shown in 3, the present embodiment is using the relay transmission of 3 time slots, and transmitting procedure schematic diagram is as shown in figure 4, specifically include：
Step 201：Transceiver design in 1st time slot；
If there are two source node groups, two semiduplex via nodes in system, and two destination nodes, make SiRepresent
Source node group i, i ∈ { 1,2 }, RlRepresent via node l, the l ∈ { 1,2 }, D of configuration M root antennasiRepresent the mesh with M root antennas
Node i.SiIn have M single-antenna subscriber, in k-th of time slot, SiBy via node to its corresponding destination node DiPass
Transmission of data s[k].In the 1st time slot, two via node R1And R2Received, source node group S1To two via nodes
Send data s[1], two via node R1And R2The signal received is respectively：
r[1][1]=Η[1,1][1]s[1]+z[1],
r[2][1]=Η[2,1][1]s[1]+z[2],
Wherein, r[l][k] represents via node RlThe signal received in k-th of time slot, Η[l,i]When [k] is k-th
Source node group S in gapiTo via node RlChannel matrix, z[l]For via node RlNoise vector.Because noise does not influence
Ignore noise item in the calculating of the free degree, follow-up formula.After the end of transmission of 1st time slot, via node R1And R2Respectively
Utilize ZF decoding matrix Η[1,1][1]-1With Η[2,1][1]-1S can be obtained[1]。
Step 202：Transceiver design in 2nd time slot；
In 2nd time slot, R1It is transmitted and R2Received, R1Transmit the data s that the 1st slot decoder goes out[1], simultaneously
Source node group S2Transmit data s[2].Therefore, in the 2nd time slot, via node R2R can be received1The data of transmission can be received again
S2The data of transmission, are expressed as follows
r[2][2]=F[2,1][2]s[1]+Η[2,2][2]s[2],
Wherein, F[2,1][k] is R in k-th of time slot1To R2Channel matrix.In via node R2, construct following matrix side
Journey：
Wherein, Η[2,1][1]、F[2,1][2] and Η[2,2][2] all it is non-singular matrix that order is M, therefore equivalent matrix
Order be 2M.Via node R2Utilize ZF decoding matrixIt can obtain s[1]And s[2]。
In addition, in the 2nd time slot, destination node D1And D2The signal received is respectively：
y[1][2]=G[1,1][2]s[1],
y[2][2]=G[2,1][2]s[1],
Wherein, y[i][k] is destination node D in k-th of time slotiThe signal received, G[i,l][k] be in k-th time slot in
After node RlTo destination node DiChannel matrix, destination node D1And D2It is utilized respectively ZF decoding matrix G[1,1][2]-1With G[2,1]
[2]-1S can be obtained[1]。
Step 203：Transceiver design in 3rd time slot；
In 3rd time slot, R2To destination node D2Send s[2], therefore, destination node D in the 3rd time slot2The signal received
It can be expressed as：
y[2][3]=G[2,2][3]s[2],
Destination node D2Utilize ZF decoding matrix G[2,2][3]-1It can obtain the expected data s of oneself[2]。
The glitch-free data number that the embodiment of the present invention can be decoded using 3 time slots is 2M.Therefore relaying need not
Jumped with first and the second global CSI jumped is reachableTo the individual free degree, and existing scheme can be greatly reduced in mesh
Node decoding complex degree.
On the basis of embodiment one, the embodiment of the present invention two is additionally provided and received under a kind of two cells multi-user's Two-Hop
The data transmission method of hair machine, the asymptotic value for the normalization free degree that this method can be reached using the relay transmission of more multi-slot
For 1, specific transmitting procedure schematic diagram as shown in figure 5, including：
Step 301：Transceiver design in 1st time slot and the 2nd time slot；
The design method of preceding 2 time slots is consistent in transceiver design be the same as Example 2 in preceding 2 time slots.
Step 302：Transceiver design in 3rd time slot；
In the 3rd time slot, via node R2It is transmitted and R1Received, R2Transmit s[2], while source node group S1Pass
Send data s[3].Therefore, in the 3rd time slot, via node R1The signal received can be expressed as：
r[1][3]=F[1,2][3]s[2]+Η[1,1][3]s[3],
Wherein, F[1,2][k] is R in k-th of time slot2To R1Channel matrix.In the 3rd time slot, two destination nodes are received
To signal can be expressed as：
y[1][3]=G[1,2][3]s[2],
y[2][3]=G[2,2][3]s[2],
Destination node D1And D2It is utilized respectively ZF decoding matrix G[1,2][3]-1And G[2,2][3]-1S can be obtained[2]。
Step 303：Transceiver design in 4th time slot；
In the 4th time slot, R1It is transmitted and R2Received, R1Transmit the signal r that the 3rd time slot is received[1][3],
While source node group S2Transmit data s[4].Therefore, in the 4th time slot, via node R2The signal received can be expressed as：
r[2][4]=F[2,1][4]r[1][3]+Η[2,2][4]s[4]
=F[2,1][4](F[1,2][3]s[2]+Η[1,1][3]s[3])+Η[2,2][4]s[4],
In the 4th time slot, the signal that two destination nodes are received can be expressed as：
y[1][4]=G[1,1][4]r[1][3]=G[1,1][4](F[1,2][3]s[2]+Η[1,1][3]s[3]),
y[2][4]=G[2,1][4]r[1][3]=G[2,1][4](F[1,2][3]s[2]+Η[1,1][3]s[3]),
Destination node D1Utilize y[1][3] and y[1][4] following matrix equation is constructed：
Matrix in above formulaOrder be 2M, therefore destination node D1Utilize ZF decoding matrixS can be decoded[3].For destination node D2, it decodes s[3]Method and D1It is similar.
Step 304：Transceiver design in 5th time slot；
In the 5th time slot, R2It is transmitted and R1Received, R2Transmit the signal r that the 4th time slot is received[2][4], together
When source node group S1Transmit data s[5].Therefore, in the 5th time slot, via node R1The signal received can be expressed as：
r[1][5]=F[1,2][5]r[2][4]+Η[1,1][5]s[5]
=F[1,2][5]F[2,1][4]F[1,2][3]s[2]+F[1,2][5]F[2,1][4]Η[1,1][3]s[3]+Η[1,1][5]s[5],
In the 5th time slot, the signal that two destination nodes are received can be expressed as：
y[1][5]=G[1,2][5]r[2][4]
=G[1,2][5](F[2,1][4]F[1,2][3]s[2]+F[2,1][4]Η[1,1][3]s[3]+Η[2,2][4]s[4]),
y[2][5]=G[2,2][5]r[2][4]
=G[2,2][5](F[2,1][4]F[1,2][3]s[2]+F[2,1][4]Η[1,1][3]s[3]+Η[2,2][4]s[4]),
Destination node D1Utilize y[1][3]、y[1][4] and y[1][5] following matrix equation is constructed：
Matrix in above formulaOrder be 3M, therefore destination node D1S can be decoded[4].For destination node D2, it is solved
Code s[4]Method and D1It is similar.
Step 305：Transceiver design in 6th time slot；
In the 6th time slot, R1It is transmitted and R2Received, R1Transmit the signal r that the 5th time slot is received[1][5], together
When source node group S2Transmit data s[6].In this time slot, destination node D1And D2S can be obtained[5]。
Step 306：Transceiver design after 6th time slot；
By that analogy, in n-th of time slot, D1And D2S can be correctly decoded out[n-1]。
The glitch-free data number that the embodiment of the present invention can be decoded using n time slot is (n-1) M.Therefore relaying is saved
Point need not have the asymptotic value DoF of the first normalization free degree that can be reached when jumping the global CSI jumped with secondsumFor：
The data transmission method that the embodiment of the present invention is proposed, it is only necessary to which via node utilizes the first channel condition information jumped
CSI (i.e. Η[l,i]) channel condition information CSI (the i.e. F of channel between two via nodes[1,2]And F[2,1]) to pilot tone carry out
Precoding, so that, destination node can estimate equivalent channel G[i,l]F[k,l]、G[i,l]Η[l,i]And G[i,l]F[k,l]Η[l,i], enter
And obtain equivalent channel matrix.For these reasons, carry when relay transport protocol reaches 1 normalization free degree and do not require source
Node and relaying have any global CSI.
Using the data transmission method of transceiver under a kind of two cells multi-user's Two-Hop proposed by the present invention, pass through control
The data of source node group are sent in different time-gap processed, and adjust the transmitting-receiving order of half-duplex relay node, design via node
Frequency pilot sign, source node group, via node, destination node need not know the channel information of the overall situation, utilize local channel
Information can reduce the computation complexity of destination node under conditions of the specified free degree is reached, in addition, the present invention provide two
The data transmission method of transceiver can be with when that need not relay and have overall situation CSI with source node under cell multi-user's Two-Hop
The asymptotic value of the normalization free degree reached is 1.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can lead to
Hardware realization is crossed, the mode of necessary general hardware platform can also be added to realize by software.Understood based on such, this hair
Bright technical scheme can be embodied in the form of software product, and the software product can be stored in a non-volatile memories
Medium (can be CD-ROM, USB flash disk, mobile hard disk etc.) in, including some instructions are to cause a computer equipment (can be
Personal computer, server, or network equipment etc.) perform method described in each of the invention embodiment.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module or stream in accompanying drawing
Journey is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in embodiment can be divided according to embodiment description
It is distributed in the device of embodiment, respective change can also be carried out and be disposed other than in one or more devices of the present embodiment.On
The module for stating embodiment can be merged into a module, can also be further split into multiple submodule.
Disclosed above is only several specific embodiments of the present invention, and still, the present invention is not limited to this, any ability
What the technical staff in domain can think change should all fall into protection scope of the present invention.
Claims (9)
1. the data transmission method of transceiver under a kind of two cells multi-user's Two-Hop, it is characterised in that methods described includes
Following steps：
In different time slots, server controls source node group alternately data are sent, and send data according in different time-gap
Source node group difference, adjustment half-duplex relay node sends the transmitting-receiving order of data, source section to the source node group
Point group multiple single-antenna subscribers in two cells are constituted；
Methods described includes two groups of source node groups, two half-duplex relay nodes and two purpose sections being made up of base station
Point；Wherein, SiRepresent source node group i, i ∈ { 1,2 }, RlRepresent via node l, the l ∈ { 1,2 }, D of configuration M root antennasiRepresent
Destination node i, S with M root antennasiIn have M single-antenna subscriber, in k-th of time slot, SiPass through via node RlXiang Qi
Corresponding destination node DiTransmit data s[k]；
The basis sends the difference of the source node group of data in different time-gap, and adjustment half-duplex relay node is to the source node
Group sends the transmitting-receiving order of data, including：In the 1st time slot, two via node R1And R2Receive source node group S1To two
The data s that individual via node is sent[1]；In the 2nd time slot, R1It is transmitted and R2Received, R1Transmit the 1st time slot solution
The data s that code goes out[1], while source node group S2Transmit data s[2]；In time slot thereafter, two via node R1And R2Receipts
Order is sent out alternately to receive and send；
The half-duplex relay node obtains the local channel status information of oneself by channel estimation；
The pilot tone that the half-duplex relay node generates the half-duplex relay node according to the local channel status information is accorded with
Number, and destination node will be sent in the data of frequency pilot sign insertion current transmission；
Destination node extracts the frequency pilot sign received in data, and carrying out equivalent channel matrix according to the frequency pilot sign estimates
Meter, expected data is decoded according to the equivalent channel matrix estimated.
2. the method as described in claim 1, it is characterised in that the server controls source node group carries out data transmission, and
According to the difference for the source node group that data are sent in different time-gap, adjustment half-duplex relay node sends number to the source node group
According to transmitting-receiving order, specifically include：
Two via node R1And R2The signal received is respectively：
r[1][1]=Η[1,1][1]s[1]+z[1],
r[2][1]=Η[2,1][1]s[1]+z[2],
Wherein, r[l][k] represents via node RlThe signal received in k-th of time slot, Η[l,i][k] is in k-th of time slot
Source node group SiTo via node RlChannel matrix, z[l]For via node RlNoise vector, because noise does not influence freedom
Ignore noise item in the calculating of degree, follow-up formula；
After the end of transmission of 1st time slot, via node R1And R2It is utilized respectively ZF decoding matrix Η[1,1][1]-1With Η[2,1]
[1]-1Calculated, obtain s[1]。
3. method as claimed in claim 2, it is characterised in that the server controls source node group carries out data transmission, and
According to the difference for the source node group that data are sent in different time-gap, adjustment half-duplex relay node sends number to the source node group
According to transmitting-receiving order, in addition to：
The via node R2The data received, are expressed as follows：
r[2][2]=F[2,1][2]s[1]+Η[2,2][2]s[2],
Wherein, F[2,1][k] is R in k-th of time slot1To R2Channel matrix；
In via node R2, construct following matrix equation：
Wherein, Η[2,1][1]、F[2,1][2] and Η[2,2][2] be all order be M non-singular matrix,For its equivalent matrix, order is
2M；
The via node R2Utilize ZF decoding matrixCalculated, obtain s[1]And s[2]。
4. method as claimed in claim 3, it is characterised in that methods described also includes：
According to via node R2The s obtained in the 1st time slot[1], utilize r[2][2]-F[2,1][2]s[1]Eliminate r[2][2] s in[1]The interference brought, specific formula is：
r[2][2]-F[2,1][2]s[1]=Η[2,2][2]s[2]；
The via node R2Utilize ZF decoding matrix Η[2,2][2]-1Calculated, obtain s[2]。
5. method as claimed in claim 3, it is characterised in that the equivalent channel matrix that the basis is estimated is decoded
Expected data is specifically included：
In the 2nd time slot, destination node D1And D2The data that via node is sent are received, the data difference received
For
y[1][2]=G[1,1][2]s[1],
y[2][2]=G[2,1][2]s[1],
Wherein, y[i][k] is destination node D in k-th of time slotiThe data received, G[i,l][k] is relaying section in k-th of time slot
Point RlTo destination node DiChannel matrix；
Destination node D1And D2It is utilized respectively ZF decoding matrix G[1,1][2]-1With G[2,1][2]-1Calculated, obtain s[1]。
6. method as claimed in claim 3, it is characterised in that the server controls source node group carries out data transmission, and
According to the difference for the source node group that data are sent in different time-gap, adjustment half-duplex relay node sends number to the source node group
According to transmitting-receiving order, in addition to：
In the 3rd time slot, via node R2It is transmitted and R1Received, R2Transmit s[2], while source node group S1Transmit number
According to s[3], in the 3rd time slot, via node R1The signal received can be expressed as：
r[1][3]=F[1,2][3]s[2]+Η[1,1][3]s[3],
Wherein, F[1,2][k] is R in k-th of time slot2To R1Channel matrix；
In the 3rd time slot, R2To destination node D2Send s[2]；
In the 4th time slot, via node R1It is transmitted and R2Received, R1Transmit the signal r that the 3rd time slot is received[1][3], while source node group S2Transmit data s[4], in the 4th time slot, via node R2The signal received can be expressed as：
r[2][4]=F[2,1][4]r[1][3]+Η[2,2][4]s[4]
=F[2,1][4](F[1,2][3]s[2]+Η[1,1][3]s[3])+Η[2,2][4]s[4]；
In the 5th time slot, via node R2It is transmitted and R1Received, R2Transmit the signal r that the 4th time slot is received[2]
[4], while source node group S1Transmit data s[5], in the 5th time slot, via node R1The signal received can be expressed as：
r[1][5]=F[1,2][5]r[2][4]+Η[1,1][5]s[5]
=F[1,2][5]F[2,1][4]F[1,2][3]s[2]+F[1,2][5]F[2,1][4]Η[1,1][3]s[3]+Η[1,1][5]s[5]；
In the 6th time slot, via node R1It is transmitted and R2Received, R1Transmit the signal r that the 5th time slot is received[1]
[5], while source node group S2Transmit data s[6]；
Using nibbling method, in different time slots, via node carries out the transmitting-receiving of data successively, and destination node D1 and D2 are received
The signal of the via node transmission.
7. method as claimed in claim 6, it is characterised in that the equivalent channel matrix that the basis is estimated is decoded
Expected data also includes：
In the 3rd time slot, two destination node D1And D2The signal received can be expressed as：
y[1][3]=G[1,2][3]s[2],
y[2][3]=G[2,2][3]s[2],
Destination node D1And D2It is utilized respectively ZF decoding matrix G[1,2][3]-1And G[2,2][3]-1S can be obtained[2]；
In the 4th time slot, two destination node D1And D2The signal received can be expressed as：
y[1][4]=G[1,1][4]r[1][3]=G[1,1][4](F[1,2][3]s[2]+Η[1,1][3]s[3]),
y[2][4]=G[2,1][4]r[1][3]=G[2,1][4](F[1,2][3]s[2]+Η[1,1][3]s[3]),
Destination node D1Utilize y[1][3] and y[1][4] following matrix equation is constructed：
Wherein, equivalent channel matrixOrder be 2M；
Destination node D1Utilize ZF decoding matrixCalculated, obtain s[3]；
For destination node D2, utilize destination node D1Coding/decoding method obtain s[3]；
In the 5th time slot, two destination node D1And D2The signal received can be expressed as：
y[1][5]=G[1,2][5]r[2][4]
=G[1,2][5](F[2,1][4]F[1,2][3]s[2]+F[2,1][4]Η[1,1][3]s[3]+Η[2,2][4]s[4])：
y[2][5]=G[2,2][5]r[2][4]
=G[2,2][5](F[2,1][4]F[1,2][3]s[2]+F[2,1][4]Η[1,1][3]s[3]+Η[2,2][4]s[4])：
Destination node D1Utilize y[1][3]、y[1][4] and y[1][5] following matrix equation is constructed：
Wherein, equivalent channel matrixOrder be 3M；
Destination node D1Utilize ZF decoding matrixCalculated, obtain s[4]；
For destination node D2, utilize destination node D1Coding/decoding method obtain s[4]；
In the 6th time slot, destination node D1And D2Using corresponding ZF decoding matrix decode obtaining s[5]；
Utilize nibbling method, destination node D1And D2Decoded successively.
8. method as claimed in claim 7, it is characterised in that the destination node D in the 4th time slot1Decode s[3]Method also
Including：
According to D1The s obtained in the 3rd time slot[2], utilize y[1][4]-G[1,1][4]F[1,2][3]s[2]Eliminate y[1][4] s in[2]The interference brought；
Use ZF decoding matrix (G[1,1][4]Η[1,1][3])-1Calculated, obtain s[3]。
9. method as claimed in claim 7, it is characterised in that the destination node D in the 5th time slot1Decode s[4]Method also
Including：
According to D1The s obtained in time slot above[2]And s[3], utilize y[1][5]-G[1,2][5]F[2,1][4]F[1,2][3]s[2]-
G[1,2][5]F[2,1][4]Η[1,1][3]s[3]Eliminate y[1][5] s in[2]And s[3]The interference brought；
Use ZF decoding matrix (G[1,2][5]Η[2,2][4])-1Calculated, obtain s[4]。
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