CN113098666A - Multi-description coding transport framework combining space-time codes and NOMA - Google Patents

Multi-description coding transport framework combining space-time codes and NOMA Download PDF

Info

Publication number
CN113098666A
CN113098666A CN202110320710.2A CN202110320710A CN113098666A CN 113098666 A CN113098666 A CN 113098666A CN 202110320710 A CN202110320710 A CN 202110320710A CN 113098666 A CN113098666 A CN 113098666A
Authority
CN
China
Prior art keywords
user
noma
signals
description
channel
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.)
Granted
Application number
CN202110320710.2A
Other languages
Chinese (zh)
Other versions
CN113098666B (en
Inventor
李素月
孟凡一
武迎春
王安红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiyuan University of Science and Technology
Original Assignee
Taiyuan University of Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Taiyuan University of Science and Technology filed Critical Taiyuan University of Science and Technology
Priority to CN202110320710.2A priority Critical patent/CN113098666B/en
Publication of CN113098666A publication Critical patent/CN113098666A/en
Application granted granted Critical
Publication of CN113098666B publication Critical patent/CN113098666B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H04L1/0637—Properties of the code
    • H04L1/0643—Properties of the code block codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0047—Decoding adapted to other signal detection operation
    • H04L1/0048—Decoding adapted to other signal detection operation in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0052—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables

Abstract

The invention discloses a multi-description coding transmission frame combining space-time codes and NOMA (non-orthogonal multiple access), which belongs to the technical field of wireless communication and is specifically realized by the following steps: at a transmitting end, a transmitting signal of each user is firstly decomposed into a plurality of equally important descriptions by utilizing a multi-description coding idea, N staggered and superposed power domain NOMA signals are constructed for the plurality of descriptions of all the users according to the strength of a multi-user channel, then different NOMA signals are respectively transmitted to L user ends by N antennas of a base station end in a plurality of adjacent time slots by utilizing a space-time block coding scheme, each user end carries out STBC decoding firstly, then serial interference elimination processing is adopted to recover the transmitting signal, and according to the principle of multi-description decoding, even if only one of the plurality of descriptions can be successfully decoded, the complete original image information can be recovered, so that the proposed multi-description coding transmission scheme combining STBC and NOMA has higher reliability and transmission efficiency.

Description

Multi-description coding transport framework combining space-time codes and NOMA
Technical Field
The invention belongs to the technical field of wireless communication, and particularly relates to a multi-description coding transmission framework combining a space-time code and NOMA.
Background
With the development of mobile communication, spectrum resources become more and more scarce, and how to more effectively utilize the spectrum resources becomes a problem to be solved urgently by 5G. Compared with the previous generation communication system, the system capacity and throughput need to be further expanded, and the requirements of video service and data service on time delay need to be improved, so the occurrence of NOMA becomes a research hotspot.
Compared with the prior generation communication system, the NOMA introduces some new technologies, such as a serial interference cancellation technology and a power domain multiplexing technology, so that the robustness of the system is improved, the technologies greatly improve the utilization rate of a frequency spectrum on the premise of ensuring the service rate of a mobile user, the NOMA has become a 5G key technology by virtue of the advantages of the NOMA, and the research on the NOMA is still in progress.
Multi Description Coding (MDC) is a coding method that can take account of the real-time requirement of data transmission and solve the problem of data distortion, it can decompose the same image into Multiple equally important descriptions, encode each description independently and transmit to the decoding end through different channels, if the data packet of some channels is wrong, lost or can't reach the decoding end normally in real time because of the blocking delay, the decoder can recover the visually acceptable reconstructed image from other descriptions that can be received correctly; if the code stream of the channel can be received, a high-quality image can be reconstructed, so that the transmission robustness is greatly improved.
Space-Time Block Coding (STBC) is a technique used in wireless communications to transmit multiple copies of a data stream over multiple antennas and to improve the reliability of data transmission using various received data versions. Among them the Alamouti coding is the most commonly used coding. The two antennas are adopted to transmit different signals in two different time slots to reach a receiving end, and better error rate performance is realized.
Based on the above research, we will combine the space-time code and the multiple description coding of NOMA to propose a new system framework, which can improve the complexity of decoding, improve the diversity gain of the system, and simultaneously have the advantages of MDC and NOMA schemes, and increase the spectrum efficiency and transmission robustness of the system.
Disclosure of Invention
In order to solve the technical problem, the invention provides a multi-description coding transmission framework combining a space-time code and NOMA, and after a signal is decomposed into a plurality of equally important descriptions by using an MDC scheme, the transmission of the NOMA signal to L users in adjacent time slots through N antennas is completed by using STBC coding.
The technical scheme to be protected by the invention is as follows: a multi-description coding transmission frame combining space-time codes and NOMA comprises a transmitting end and a receiving end, wherein a base station end is configured with N antennas as the transmitting end, through multi-description coding processing, NOMA and space-time block code coding are utilized to transmit interleaved and superposed NOMA signals to L users, and each user at the receiving end successively passes through STBC decoding and SIC processing to decode the original signals of the users, and the specific implementation steps are as follows:
at the transmitting end, firstly, the thought of multi-description coding is applied, the signal of each user is decomposed into N equally important descriptions, and L image signals s are transmitted1,s2,…,sLIs decomposed into s1,k,s2,k,…,sL,kN, then for the decomposed multiple description signals of all users, N superimposed power domain NOMA signals are constructed by interleaving according to the strength of the multi-user channel, the principle of NOMA interleaving superposition is that the good user description of the channel and the poor user description of the channel are superimposed with different power, for example, the jth NOMA signal is expressed as
Figure BDA0002992714440000021
Wherein P issExpressing total transmitted power, fractional division coefficient alphal1, …, L, and α1+α2+…+αL1, and further allocating NOMA power according to the strength of the multi-user channel quality, wherein the ratio of the power allocated by the user with good channel quality to the total transmission power is small, and the ratio of the power allocated by the user with poor channel quality to the total transmission power is relatively large; the base station terminal is configured with N antennas, and N NOMA signals are transmitted to L user terminals by the N antennas in a plurality of adjacent time slots by utilizing the STBC principle;
at a receiving end, each user carries out STBC decoding on signals received by two time slots, then further processing is carried out by using SIC to recover the multi-description information of the user, and finally the original signals are decoded by combining the recovered multi-description information.
Further, when N is 2 and L is 2, the specific signal transmission is as follows:
s1, constructing a downlink with two antennas at the base station, where the user number L is 2, and one of the two users is a remote user UE1One for a near user UE2The method is characterized in that the NOMA signals are transmitted to L users through multiple description coding processing by using NOMA and space-time block code coding, the interleaved and superposed NOMA signals are transmitted to a receiving end, each user successively passes through STBC decoding and SIC processing for serial interference elimination, and original signals of the users are decoded.
S2, the following details describe the specific implementation of the transmitting end of the invention:
s21, firstly, applying MDC technique to the signal S1、s2Into two equally important descriptions s1,kAnd s2,kAnd k is 1,2, then for two description signals which are decomposed by all users, according to the strength of the multi-user channel, 2 superposed power domain NOMA signals are constructed by interleaving
Figure BDA0002992714440000022
p is the total power of the system, and the principle of NOMA staggered superposition is that the user description with good channel is superposed with the user description with relatively poor channel in different power sizes, and UE1Being a weak user, UE2Is a strong user, so1＞α2And alpha is1+α21, wherein α1For the UE1Power distribution coefficient of alpha2For the UE2The power distribution coefficient of (a);
s22, then, the base station end uses Alamouti STBC scheme to send the superimposed signal, based on the Alamouti coding mode, in the first time slot, the antenna 1 sends x1Antenna 2 transmits x2(ii) a In the second time slot, antenna 1 transmits-x2 *Antenna 2 transmits x1 *Wherein x represents a complex conjugate, x1And x2Respectively is containing s1And s2Superimposed signal of signals, x1And x2As follows:
Figure BDA0002992714440000031
Figure BDA0002992714440000032
s3, I introduce the specific implementation scheme of STBC decoding and SIC at the receiving end in detail below:
s31, defining the channel from base station to user as Rayleigh fading channel and defining the channel from m antenna to l user as hm,lIt is a mean of 0 and a variance of λm,lComplex gaussian variable of (a). The channel is assumed to remain unchanged for two symbol periods. The received signal of the l-th user can be expressed as time 1 and time 2
yl1＝h1,lx1+h2,lx2+wl1
Figure BDA0002992714440000033
Wherein, wl1And wl2Mean 0 and variance σ2Complex gaussian noise.
By STBC decoding, the expression of the received signal of the l-th user can be written as
yl'1＝||hl||2x1+wl'1
yl'2＝||hl||2x2+wl'2
Wherein hl||2＝|h1l|2+|h2l|2，w'l1And w'l2Is a mean of 0 and a variance of||hl||2Complex gaussian noise.
S32, for UE1In other words, due to α1＞α2When decoding a signal using interference cancellation (SIC) techniques, the UE1In the decoding process, s is converted into2,kDecoding s as noise1,kCan derive the UE1Has a signal to interference and noise ratio (SINR) of
Figure BDA0002992714440000034
For UE2To say that it decodes s first1,kTo thereby detect s1,kThen subtracting s from the superimposed signal1,kThen decodes its own signal, UE, using SIC techniques2Decoding s1,kSINR of
Figure BDA0002992714440000035
UE2Decoding s2,kSINR of
Figure BDA0002992714440000036
Compared with the prior art, the invention has the following advantages: the multi-description coding implementation framework combining space-time codes and NOMA first decomposes a signal into a plurality of equally important descriptions by using a multi-description coding technique, which can reduce the error rate of decoding, thereby improving the accuracy of decoding. Then, the base station end transmits NOMA signals to users by using an STBC coding mode, space-time block codes can effectively resist channel fading and improve system capacity, the advantages of space diversity and time diversity are integrated, diversity gain and coding gain are provided, and the channel utilization rate far higher than that of a single-antenna system can be obtained.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a system transmission block diagram of the present invention;
FIG. 2 is a block diagram of the system transmission of the present invention with 2 transmit antennas and 2 receive users;
FIG. 3 is a NOMA signal construction principle of the present invention;
FIG. 4 is a schematic diagram of STBC in the present invention;
FIG. 5 is a simulation of the outage probability of the system of the present invention;
FIG. 6 is a graph of the traversal rate simulation of user 1 of the present invention;
fig. 7 is a graph of the traversal rate simulation of user 2 of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, the base station of the present invention employs multiple antennas, where multiple users are all single antennas, and firstly, the multiple description coding concept is utilized to code signals into multiple equally important descriptions, and form superimposed NOMA signals according to the strength of user channels, then at the base station, multiple antennas are used to respectively send different NOMA signals to the user terminal in adjacent time slots by using STBC scheme, and then at the user terminal, STBC decoding is performed first, and then serial interference cancellation is used to further decode, even if only one of the multiple descriptions can be successfully decoded, complete image information can be recovered.
In the following, taking two transmitting antennas (N ═ 2) and two receiving users (L ═ 2) as an example, the Alamouti space-time code scheme is adopted.
FIG. 2 is a block diagram of a system implementation of the present invention, including a system model and a signal transmission process
S1, constructing a downlink with two antennas at the base station, where the user number L is 2, and one of the two users is a remote user UE1One for a near user UE2And all the antennas are single receiving antennas, and the interleaved and superposed NOMA signals are transmitted to L users by multi-description coding processing and NOMA and space-time block code coding. At the receiving end, each user successively passes through STBC decoding and serial interference elimination SIC processing to decode the original signal of the user.
S2, the following details describe the specific implementation of the transmitting end of the invention:
s21, firstly, applying MDC technique to the signal S1、s2Into two equally important descriptions s1,kAnd s2,kAnd k is 1,2, then for two description signals which are decomposed by all users, according to the strength of the multi-user channel, 2 superposed power domain NOMA signals are constructed by interleaving
Figure BDA0002992714440000041
p is the total power of the system. The principle of NOMA staggered overlap is that the good user description of the channel is overlapped with the relatively poor user description of the channel with different power size, and UE1Being a weak user, UE2Is a strong user, so1＞α2And alpha is1+α21, wherein α1For the UE1Power distribution coefficient of alpha2For the UE2The power distribution coefficient of (1).
S22, then, the base station end uses Alamouti STBC scheme to send the superimposed signal, based on the Alamouti coding mode, in the first time slot, the antenna 1 sends x1Antenna 2 transmits x2(ii) a In the second time slot, antenna 1 transmits-x2 *Antenna 2 transmits x1 *Wherein denotes a complex conjugate. x is the number of1And x2Respectively is containing s1And s2Superimposed signal of signals, x1And x2As follows:
Figure BDA0002992714440000051
Figure BDA0002992714440000052
s3, I introduce the specific implementation scheme of STBC decoding and SIC at the receiving end in detail below:
s31, defining the channel from base station to user as Rayleigh fading channel and defining the channel from m antenna to l user as hm,lIt is a mean of 0 and a variance of λm,lComplex gaussian variable of (a). The channel is assumed to remain unchanged for two symbol periods. The received signal of the ith user at time 1 and time 2 can be expressed as:
yl1＝h1,lx1+h2,lx2+wl1
Figure BDA0002992714440000053
wherein, wl1And wl2Mean 0 and variance σ2Complex gaussian noise.
By STBC decoding, the expression of the received signal of the ith user can be written as:
yl'1＝||hl||2x1+wl'1
yl'2＝||hl||2x2+wl'2
wherein hl||2＝|h1l|2+|h2l|2，w'l1And w'l2Is a mean value of 0 and a variance of hl||2Complex gaussian noise.
S32, for UE1In other words, due to α1＞α2When decoding a signal using interference cancellation (SIC) techniques, the UE1In the decoding process, s is converted into2,kDecoding s as noise1,kCan derive the UE1Has a signal to interference and noise ratio (SINR) of
Figure BDA0002992714440000054
For UE2To say that it decodes s first1,kTo thereby detect s1,kThen subtracting s from the superimposed signal1,kThen decodes its own signal, UE, using SIC techniques2Decoding s1,kSINR of
Figure BDA0002992714440000055
UE2Decoding s2,kSINR of
Figure BDA0002992714440000056
The following analyzes the outage probability for the proposed transport framework to evaluate its performance. Defining outage probability as UE1Fails to successfully decode s1,kOr UE2Fails to successfully decode s2,kThe system generates an interrupt event.
To UE1In other words, s is successfully decoded1,kI.e., decoding is successful, so the UE1Probability of interruption P1Can be calculated as:
Figure BDA0002992714440000061
wherein
Figure BDA0002992714440000062
For the UE1Transmission rate of R1For the UE1The target rate of (2). The UE can be obtained through calculation1The interruption probability P1 is:
Figure BDA0002992714440000063
wherein
Figure BDA0002992714440000064
γ1Is R1SINR, λ ofk,1Is the channel variance from the kth antenna to user 1.
To UE2In other words, successful decoding requires that the following two conditions are met: UE (user Equipment)2Successful decoding s1,kAnd UE2Successful decoding s2,kTherefore UE2Probability of interruption P2Can be calculated as:
Figure BDA0002992714440000065
can find out the UE2Is interrupted by a probability P2Is composed of
Figure BDA0002992714440000066
Wherein the content of the first and second substances,
Figure BDA0002992714440000067
γ2is R2SINR, λ ofk,2The channel variance for the k-th antenna to user 2.
For the proposed transport framework, the traversal rate performance of the system is analyzed. The total traversal rate is the sum of the traversal rates of user 1 and user 2, i.e.
Figure BDA0002992714440000068
Traversal rate for user 1:
Figure BDA0002992714440000069
wherein h1||2＝|h11|2+|h21|2Let us order
Figure BDA00029927144400000610
Figure BDA00029927144400000611
Can be calculated as
Figure BDA00029927144400000612
Wherein the content of the first and second substances,
Figure BDA00029927144400000613
is the Cumulative Distribution Function (CDF) of μ. Solving the approximate solution of the formula by using Gauss-Chebyshev quadrature method to obtain
Figure BDA00029927144400000614
Wherein
Figure BDA00029927144400000615
Where K is the precision-complexity tradeoff parameter. So UE1Is calculated as
Figure BDA00029927144400000616
User 2 traversal Rate the traversal Rate from base station to user 2 can be calculated as
Figure BDA0002992714440000071
Wherein h2||2＝|h12|2+|h22|2. Order to
Figure BDA0002992714440000072
Figure BDA0002992714440000073
Can be calculated as
Figure BDA0002992714440000074
For real numbers a >0 and b >0, we have
Figure BDA0002992714440000075
Can obtain
Figure BDA0002992714440000076
Wherein
Figure BDA0002992714440000077
So that the traversal rate of user 2 is
Figure BDA0002992714440000078
In experiments, the feasibility and the effectiveness of the invention are comprehensively verified by changing parameters influencing the system performance respectively.
FIG. 3 shows the principle of interleaved superposition NOMA signal construction for this system, with the left side being a diagram of multiple description coding, with data content s1And s2Coded into two equally important descriptions s1,kAnd s2,kK is 1,2, and then using the operating principle of NOMA, wills1,1And s2,1Coded as a NOMA signal, i.e. x1(ii) a Will s1,2And s2,2Respectively multiplied by different power coefficients to code into a NOMA signal, namely x2And then transmitted through the antenna.
FIG. 4 shows the working principle of space-time block coding, in which two antennas at the base station end respectively transmit different NOMA signals in two time slots, and in the first time slot, antenna 1 transmits x1Antenna 2 transmits x2(ii) a In the second time slot, antenna 1 transmits
Figure BDA0002992714440000079
Antenna 2 transmission
Figure BDA00029927144400000710
Wherein denotes a complex conjugate.
Fig. 5 gives a simulation diagram of the outage probability of a system with a fixed power allocation. Wherein λk,1＝0.5，λk,2At 1, we consider two power allocation schemes, i.e. α10.7 and α1In the figure, "simulation" represents simulation and "analytical" represents numerical analysis, which is 0.9. It can be seen from the figure that as the transmission power increases, the interruption probability decreases, and the analysis value and the simulation result curve are in good agreement.
Fig. 6 shows a graph of the traversal rate simulation for system user 1 with fixed power allocation. At α1＝0.6，α1＝0.7，α1In the case of 0.9, the traversal rate of user 1 is plotted, in the plot, "simulation" represents simulation, "analytical" represents numerical analysis, and "approximate" curve is an approximation result, and the numerical analysis, the simulation result, and the approximation result all approximately coincide, and user 1 finally tends to be stable because the signal of user 2 interferes with the decoding of user 1.
Fig. 7 shows a graph of the traversal rate simulation for system user 1 with fixed power allocation. Is also at alpha1＝0.6，α1＝0.7，α1In the case of 0.9, it can be seen that as the power increases, the traversal rate of user 2 is notThe discontinuity increases.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (2)

1. A multi-description coding transmission frame combining space-time codes and NOMA is characterized in that the specific transmission frame comprises a transmitting end and a receiving end, a base station end configures N antennas as the transmitting end, the NOMA and the space-time block codes are used for coding through multi-description coding, staggered and superposed NOMA signals are transmitted to L users, the receiving end decodes each user successively through STBC, serial interference elimination SIC processing, and original signals of the users are decoded, and the specific implementation steps are as follows:
at the transmitting end, firstly, the thought of multi-description coding is applied, the signal of each user is decomposed into N equally important descriptions, and L image signals s are transmitted1,s2,…,sLIs decomposed into s1,k,s2,k,…,sL,kAnd k is 1,2, …, N, then for the decomposed multiple description signals of all users, N superposed power domain NOMA signals are constructed by interleaving according to the strength of the multi-user channel, and the principle of NOMA interleaving superposition is that the good user description of the channel and the poor user description of the channel are superposed with different power, for example, the jth NOMA signal is expressed as
Figure FDA0002992714430000011
Wherein P issExpressing total transmitted power, fractional division coefficient alphal1, …, L, and α1+α2+…+αL1, and further allocating NOMA power according to the strength of the multi-user channel quality, wherein the ratio of the power allocated by the user with good channel quality to the total transmission power is small, and the ratio of the power allocated by the user with poor channel quality to the total transmission power is relatively large; the base station terminal is configured with N antennas, and N NOMA signals are transmitted to L user terminals by the N antennas in a plurality of adjacent time slots by utilizing the STBC principle;
at a receiving end, each user carries out STBC decoding on signals received by two time slots, then further processing is carried out by using SIC to recover the multi-description information of the user, and finally the original signals are decoded by combining the recovered multi-description information.
2. The combined space-time code and NOMA multiple description coding transport framework of claim 1, characterized in that: when N is 2 and L is 2, the specific signal transmission is as follows:
s1, constructing a downlink with two antennas at the base station, where the user number L is 2, and one of the two users is a remote user UE1One for a near user UE2The NOMA signals are transmitted to L users through multi-description coding processing, NOMA and space-time block code coding, the interleaved and superposed NOMA signals are transmitted to a receiving end, each user successively passes through STBC decoding and SIC processing, and original signals of the users are decoded;
s2, the following details describe the specific implementation of the transmitting end of the invention:
s21, firstly, applying MDC technique to the signal S1、s2Into two equally important descriptions s1,kAnd s2,kAnd k is 1,2, then for two description signals which are decomposed by all users, according to the strength of the multi-user channel, 2 superposed power domain NOMA signals are constructed by interleaving
Figure FDA0002992714430000012
p is the total power of the system, and the principle of NOMA staggered superposition is that the user description with good channel is superposed with the user description with relatively poor channel in different power sizes, and UE1Being a weak user, UE2Is a strong user, so1＞α2And alpha is1+α21, wherein α1For the UE1Power distribution coefficient of alpha2For the UE2The power distribution coefficient of (a);
s22, then, the base station end uses Alamouti STBC scheme to send the superimposed signal, based on the Alamouti coding mode, in the first time slot, the antenna 1 sends x1Antenna 2 transmits x2(ii) a In the second time slot, antenna 1 transmits-x2 *Antenna 2 transmits x1 *Wherein x represents a complex conjugate, x1And x2Respectively is containing s1And s2Superimposed signal of signals, x1And x2As follows:
Figure FDA0002992714430000021
Figure FDA0002992714430000022
s3, I introduce the specific implementation scheme of STBC decoding and SIC at the receiving end in detail below:
s31, defining the channel from base station to user as Rayleigh fading channel and defining the channel from m antenna to l user as hm,lIt is a mean of 0 and a variance of λm,lAssuming that the channel remains unchanged for two symbol periods, the received signal of the ith user can be represented as time 1 and time 2
yl1＝h1,lx1+h2,lx2+wl1
Figure FDA0002992714430000023
Wherein, wl1And wl2Mean 0 and variance σ2Complex Gaussian noise;
by STBC decoding, the expression of the received signal of the l-th user can be written as
y′l1＝||hl||2x1+w′l1
y′l2＝||hl||2x2+w′l2
Wherein hl||2＝|h1l|2+|h2l|2，w′l1And w'l2Is a mean value of 0 and a variance of hl||2Complex gaussian noise of (a);
s32, for UE1In other words, due to α1＞α2When decoding a signal using interference cancellation (SIC) techniques, the UE1In the decoding process, s is converted into2,kDecoding s as noise1,kCan derive the UE1Has a signal to interference plus noise ratio SINR of
Figure FDA0002992714430000024
For UE2To say that it decodes s first1,kTo thereby detect s1,kThen subtracting s from the superimposed signal1,kThen decodes its own signal using SIC technique, U2 decodes s1,kSINR of
Figure FDA0002992714430000025
UE2Decoding s2,kSINR of
Figure FDA0002992714430000026
CN202110320710.2A 2021-03-25 2021-03-25 Multi-description coding transport framework combining space-time codes and NOMA Active CN113098666B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110320710.2A CN113098666B (en) 2021-03-25 2021-03-25 Multi-description coding transport framework combining space-time codes and NOMA

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110320710.2A CN113098666B (en) 2021-03-25 2021-03-25 Multi-description coding transport framework combining space-time codes and NOMA

Publications (2)

Publication Number Publication Date
CN113098666A true CN113098666A (en) 2021-07-09
CN113098666B CN113098666B (en) 2022-12-06

Family

ID=76669966

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110320710.2A Active CN113098666B (en) 2021-03-25 2021-03-25 Multi-description coding transport framework combining space-time codes and NOMA

Country Status (1)

Country Link
CN (1) CN113098666B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109565429A (en) * 2017-06-09 2019-04-02 Lg 电子株式会社 The method and its equipment of reference signal are sent/received in a wireless communication system
CN110492915A (en) * 2019-06-03 2019-11-22 中央民族大学 A kind of power distribution method based on the short packet transmission of MIMO-NOMA

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109565429A (en) * 2017-06-09 2019-04-02 Lg 电子株式会社 The method and its equipment of reference signal are sent/received in a wireless communication system
CN110492915A (en) * 2019-06-03 2019-11-22 中央民族大学 A kind of power distribution method based on the short packet transmission of MIMO-NOMA

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TIAN TANGD等: "MDC-NOMA：Multiple Description Coding-Based Nonorthogonal Multiple Access for Image Transmission", 《IEEE SYSTEM JOURNAL》, vol. 15, no. 3, 7 August 2020 (2020-08-07), pages 3633 - 3639, XP011874587, DOI: 10.1109/JSYST.2020.3010791 *

Also Published As

Publication number Publication date
CN113098666B (en) 2022-12-06

Similar Documents

Publication Publication Date Title
KR100778647B1 (en) Combined channel coding and space-block coding in a multi-antenna arrangement
EP1810434B1 (en) Apparatus and method for space-time frequency coding in a multi-antenna transmission system
CN102804869B (en) Multiband antenna for cooperative MIMO
MX2007006649A (en) Cooperative mimo in multicell wireless networks.
US7342970B2 (en) Array processing using an aggregate channel matrix generated using a block code structure
Jiang et al. Toward URLLC: A full duplex relay system with self-interference utilization or cancellation
CN101442394A (en) Network encode collaboration communication method capable of iteratively decoding
Bhardwaj et al. Examination of outage probability for next generation non orthogonal multiple access scheme in uplink and downlink scenario
CN102332965A (en) Data transmission method and system thereof based on transmission diversity mode
CN105007141A (en) Information transmission method for multi-user MIMO relay system
CN101047474A (en) TD-SCDMA uplink link method combined with MIMO technology
CN113098666B (en) Multi-description coding transport framework combining space-time codes and NOMA
EP1803268A2 (en) Receiver apparatus, and associated method, for operating upon data communicated in a mimo, multi-code, mc-cdma communication system
CN1555613A (en) Receiving method based on MIMO CDMA
Wu et al. Quasi-orthogonal space-time block coded spatial modulation
Prashar et al. Performance Analysis of MIMO-NOMA and SISO-NOMA in Downlink Communication Systems
CN101953088A (en) Orthogonal projection precoding and decoding method and equipment by using part CSI feedback
Li et al. STBC-assisted MDC-NOMA image transmission scheme for multi-antenna systems
CN109152058B (en) Inter-cell interference elimination method based on power division in NOMA system
Xiao et al. Canceling co-channel interference for MIMO CDMA systems
Rahman et al. Mitigation of MIMO co-channel interference using robust interference cancellation receiver
WO2009091010A2 (en) Method for transmitting block of symbols in mimo networks
Hu et al. Performance analysis of rateless-coded non-orthogonal multiple access
Hu et al. Performance Analysis of MIMO-HARQ Schemes in LTP for Space Information Networks
Abeden et al. Response of Channel Inversion Technique with Space Time Block Code in Multi-User MIMO

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant