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A cooperative communication method and system based on non-orthogonal multiple access

A non-orthogonal multiple access and cooperative communication technology, which is applied in the field of cooperative communication methods and systems based on non-orthogonal multiple access, can solve problems such as system energy consumption, achieve low total energy consumption, improve spectrum efficiency, and widely The effect of practical application prospects

Inactive Publication Date: 2021-11-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, it often occurs that the system consumes too much energy

Method used

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  • A cooperative communication method and system based on non-orthogonal multiple access
  • A cooperative communication method and system based on non-orthogonal multiple access
  • A cooperative communication method and system based on non-orthogonal multiple access

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Experimental program
Comparison scheme
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Embodiment 1

[0078] Such as figure 1 As shown, a cooperative communication method based on non-orthogonal multiple access, comprising the following steps:

[0079] Step 1: The relay node receives the source node signal and the channel state information of the source node signal;

[0080] The source node signal received by the relay node is:

[0081]

[0082] Among them, h 1 is the Gaussian channel of the uplink communication link, h 2 is the Gaussian channel of the downlink communication link, P 1 is the source node S 1 power, P 2 is the source node S 2 power, s 1 is the source node S 1 The source node signal of s 2 is the source node S 2 source node signal of n R is additive white Gaussian noise, and n R Obey the mean is 0, the variance is σ 2 Gaussian distribution.

[0083] Step 2: The relay node uses continuous interference cancellation to decode the source node signal to obtain the decoded signal;

[0084] After the relay node receives the signal, the continuous inter...

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Abstract

The invention discloses a cooperative communication method based on non-orthogonal multiple access, comprising the following steps: a relay node receives a source node signal and channel state information; the relay node uses continuous interference elimination to decode the source node signal , to obtain the decoded signal; the decoded signal is superimposed and encoded according to the power allocation coefficient, and the relay node and multiple destination nodes transmit the superimposed signal to multiple destination nodes at the same time through downlink non-orthogonal multiple access; the destination node uses Continuous interference elimination decodes superimposed signals and restores information; calculates the transmit power and power allocation coefficients of all nodes according to channel state information and user requirements, and multiple source nodes and relay nodes are accessed through uplink non-orthogonal multiple access. The obtained information is sent to the relay node; the present invention uses non-orthogonal multiple access technology to meet the user rate, minimize the total consumption of the system, effectively expand the access of the number of users, improve the spectrum efficiency of the system, and reduce the Power consumption.

Description

technical field [0001] The invention relates to the field of wireless communication technology research, in particular to a non-orthogonal multiple access-based cooperative communication method and system. Background technique [0002] With the rapid development of wireless communication technology, people's requirements for the coverage and running time of wireless communication network are increasing day by day. In order to improve the coverage of communication network, cooperative communication based on relay is a common scheme. The use of relays can solve the problem of large path consumption between communication parties caused by geographical constraints, thereby effectively improving the coverage of the communication network and the efficiency of communication. [0003] In the prior art, however, the system often consumes too much energy. Therefore, how to fully consider the actual situation to improve relay communication performance, how to adopt reasonable power a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W72/08H04W72/12H04L1/00H04W72/54
CPCH04L1/0014H04L1/0026H04L1/0042H04W72/0473H04W72/121H04W72/542Y02D30/70
Inventor 程香梅刘梦宇刘元
Owner SOUTH CHINA UNIV OF TECH