基于单源最优路径的NOMA中继选择与协作传输

doi:10.12305/j.issn.1001-506X.2022.01.36

Abstract

Abstract:

Current non-orthogonal multiple access (NOMA) relay communication uses the random relay selection strategy without considering the differences in channel conditions between relay nodes. In order to provide relay users with better channel conditions, a new relay selection strategy based on a single source optimal path is proposed. The strategy starts with the signal broadcasting from base stations and treats users as nodes. Channel parameters are configured to find the best transmission path. After the signal reaches the target node, the base station collects all the reachable paths and performs a comparison of the channel parameters to find the best transmission path. Combining the proposed strategy with non-opportunistic NOMA, a new cooperative transmission method is obtained. This method eliminates redundant signals during relay transmission, thus the inter-signal interference is reduced. Simulation results show that the proposed method can achieve lower user outage probability and system complexity than the random relay selection strategy under the same conditions.

Key words: non-orthogonal multiple access (NOMA), relay selection, single source optimal path, channel parameter

CLC Number:

TN929.5

Yin LU, Gaoyu WANG, Chuying YANG, Lingqing YANG, Kun ZHAO, Hongbo ZHU. NOMA relay selection and cooperative transmission based on single source optimal path[J]. Systems Engineering and Electronics, 2022, 44(1): 292-298.

Figures/Tables 7

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References 15

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参数	数值
总用户数	4
基站与中继用户门限效应阈值/dB	10
基站与次级用户门限效应阈值/dB	5
中继与次级用户门限效应阈值/dB	0
路径损耗系数	0.5

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NOMA relay selection and cooperative transmission based on single source optimal path

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