引用本文:刘康, 刘璐, 杨崇海, 汤玮, 冯文江, 刘欢.全双工双通路中继网络干扰处理与信号检测算法[J].西南大学学报(自然科学版),2020,42(2):129~136
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全双工双通路中继网络干扰处理与信号检测算法
刘康, 刘璐, 杨崇海, 汤玮, 冯文江, 刘欢1,2
1. 贵州电网有限责任公司 电力调度控制中心, 贵阳 550002;2.
2. 重庆大学 微电子与通信工程学院, 重庆 400044
摘要:
全双工双通路连续中继(FD-TPSR)网络频谱效率高,状态控制简单,但全双工中继存在残留自干扰(RSI),发射中继对接收中继也会形成中继间干扰(IRI),会导致通信性能下降.这里提出一种中继间干扰处理方法,中继节点消除部分IRI,以提高端到端信干噪比;保留部分IRI,在目的节点构成延迟转发编码结构,以提供分集增益.同时提出一种基于并行软干扰消除的匹配滤波(MF-PSIC)信号检测算法,匹配滤波器结构简单,实现复杂度低,基于软输出的并行干扰消除能同时检测所有时隙的符号,处理时延小.仿真结果表明,中继间干扰处理方法兼顾了分集增益和累积干扰与噪声因素,相比于无IRI消除和完全IRI消除,误比特率最低;MF-PSIC信号检测算法实现复杂度低,相比于ML信号检测算法仅有很少的性能损失.
关键词:  中继网络  双通路连续中继网络  全双工  中继间干扰  信号检测
DOI:10.13718/j.cnki.xdzk.2020.02.016
分类号:
基金项目:中国南方电网有限责任公司科技项目(GZKJXM20170825);重庆市基础科学与前沿技术研究重点项目(CSTC2017JCYJBX0047).
An IRI Processing and Signal Detection Algorithm for Full-Duplex Two-Path Successive Relay Networks
LIU Kang, LIU Lu, YANG Chong-hai, TANG Wei, FENG Wen-jiang, LIU Huan1,2
1. Power Distribution and Control Center, Guizhou Power Grid Co., Ltd., Guiyang 550002, China;2.
2. College of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China
Abstract:
Full-duplex two-path successive relay (FD-TPSR) networks have high spectral efficiency and simple state control. However, there is residual self-interference (RSI) in full duplex relay, and there will also be inter-relay interference (IRI) between transmitting relay and receiving relay, which will lead to the degradation of communication performance. In this paper, an IRI processing method is proposed, in which the relay nodes eliminate partial IRI to improve the end-to-end signal-to-interference-to-noise ratio (SINR) and reserve partial IRI to form a delayed forwarding coding structure at the destination node to provide time diversity gain. A matched-filter with parallel soft interference cancellation (MF-PSIC) algorithm is proposed, in which the structure of the matched filter is simple and the implementation complexity is low, and the parallel interference cancellation based on soft output can simultaneously detect all time slot symbols in parallel, and the processing delay is small. The simulation results show that the proposed IRI processing method takes into account diversity gain, cumulative interference and noise effects and, compared with non-IRI cancellation and full IRI cancellation, its bit error rate is the lowest. The implementation complexity of MF-PSIC detection algorithm is low, and there is little performance loss compared with ML detection algorithm.
Key words:  relay network  two-path successive relay network  full-duplex  inter-relay interference  signal detection
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