Coding Schemes for an Erasure Relay Channel

Srinath Puducheri-Sundaravaradhan, J. Kliewer, T. Fuja
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引用次数: 1

Abstract

This paper considers a simple network consisting of a source, a destination, and a relay. In this model, the source- relay and relay-destination links are lossless, while the source- destination link is subject to erasures. Four coding schemes for reliably conveying k symbols from the source to the destination are described. Three of these techniques are adapted directly from well-known point-to-point coding schemes - viz., the use of maximum-distance separable (MDS) codes and Luby Transform (LT) codes. The fourth approach is a new technique using uncoded transmission from the source in conjunction with a relay that transmits a sequence with this property: When the destination subtracts the effects of the unerased symbols from the sequence, what remains is an "LT-like" code for the erased symbols - and this property holds regardless of which symbols were erased on the source-destination link. The four approaches are compared in terms of their complexity and performance.
擦除中继信道的编码方案
本文考虑了一个由源、目的和中继组成的简单网络。在该模型中,源-中继和中继-目的链路是无损的,而源-目的链路会被擦除。描述了从源到目的可靠传输k个符号的四种编码方案。其中三种技术直接改编自众所周知的点对点编码方案,即使用最大距离可分离(MDS)代码和Luby变换(LT)代码。第四种方法是一种新技术,它使用从源端发送的无编码传输与具有此属性的中继一起传输序列:当目的地从序列中减去未擦除符号的影响时,剩下的是擦除符号的“类似lt”的代码-无论源-目的地链路上删除了哪些符号,此属性都保持不变。对这四种方法的复杂性和性能进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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