慢衰落正交多址多中继信道的实用联合网络信道编码方案

A. Mohamad, R. Visoz, A. Berthet
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引用次数: 6

摘要

本文研究了慢衰落正交多址多中继信道(OMAMRC)的合作策略,定义如下:(1)在多个中继存在的情况下,独立源与单个目标通信;(2)每个继电器为半双工;(3)信号源和中继采用正交多址方案(如基于时分);(4)不同节点间的链路存在缓慢衰落和加性高斯白噪声。合作策略基于联合网络信道编解码(JNCC/JNCD)和选择性解码转发(SDF)中继。SDF是解码和转发(DF)的一种变体,其中中继转发正确解码源数据包的确定性函数。JNCC/JNCD充分利用了驻留在信道和网络代码中的空间多样性和冗余。在中继和在目的地的接收器被设计成这样的距离,使它们受益于先前激活的中继的信号,以更好地解码源。仿真结果表明了该方法的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Practical joint network-channel coding schemes for slow-fading orthogonal multiple-access multiple-relay channels
In this paper, we investigate cooperative strategies for the slow fading Orthogonal Multiple Access Multiple Relay Channel (OMAMRC), defined as follows: (1) Independent sources communicate with a single destination in the presence of multiple relays; (2) Each relay is half-duplex; (3) Orthogonal multiple access schemes (e.g., time-division based) are used by the sources and the relays; (4) The links between the different nodes of the MAMRC are subject to slow fading and additive white Gaussian noise. The cooperative strategies are based on Joint Network Channel Coding and Decoding (JNCC/JNCD) and Selective Decoding and Forward (SDF) relaying. SDF is a variant of Decode and Forward (DF) where the relays forward a deterministic function of the correctly decoded sources' packets. JNCC/JNCD fully exploits the spatial diversity and redundancy residing in both channel and network codes. The receivers at the relays and at the destination are designed in such away that they benefit from the signals of the previously activated relays to better decode the sources. Simulations show the effectiveness of the proposed approach.
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