具有ARQ和中继间侦听的中继系统的能量效率

2013 9th International Conference on Information, Communications & Signal Processing Pub Date : 2013-12-01 DOI:10.1109/ICICS.2013.6782900

Sheng Luo, Yongxu Hu, K. C. Teh

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引用次数: 0

摘要

在无线通信中，通过中继辅助传输可以获得包括更高阶分集增益和节省传输功率在内的各种优点。本文研究了一种基于自动重复请求(ARQ)协议的无线中继系统的能量效率。考虑在源节点(SN)和目的节点(DN)之间有多个中继的系统。信号传输由两个阶段组成，在每个阶段都使用ARQ协议。选择一些中继节点转发消息，并在第二阶段允许它们之间的监听。因此，可以解码源消息的中继节点的数量随着ARQ轮的进行而增加。对选择中继(SR)和分布式空时分组编码(D-STBC)两种中继方案的能量效率进行了研究。结果表明，通过中继间侦听可以提高系统的能量效率，SR-ARQ方案比D-STBC方案具有更好的能量效率。

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Energy efficiency of relaying systems with ARQ and inter-relay listening

Various advantages including higher order of diversity gain and transmission power saving can be obtained in wireless communications through relay-aided transmissions. In this paper, the energy efficiency of a wireless relaying system based on an automatic repeat request (ARQ) protocol is investigated. A system with multiple relays between a source node (SN) and a destination node (DN) is considered. The signal transmission consists of two phases and in each phase the ARQ protocol is used. Some of the relay nodes are selected for forwarding the message and overhearing between them in the second phase is allowed. As a result, the number of relay nodes that can decode source message increases as the ARQ round goes on. The energy efficiency of two relaying schemes, namely the selection relay (SR) scheme and the distributed space-time block coding (D-STBC) scheme, are investigated. It is shown that the energy efficiency of the system can be improved through inter-relay listening and the SR-ARQ scheme has better energy efficiency as compared with the D-STBC scheme.

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2013 9th International Conference on Information, Communications & Signal Processing

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