Outage analysis of coded cooperation
Outage analysis of coded cooperation
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DOI：
10.1109/tit.2005.862084
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发表时间：
2006-02
影响因子：
2.5
通讯作者：
T. E. Hunter;S. Sanayei;Aria Nosratinia
中科院分区：
文献类型：
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作者：
T. E. Hunter;S. Sanayei;Aria Nosratinia
协作通信是一种新兴的范式，其中多个移动设备共享其资源（带宽和功率）以实现更好的整体性能。编码协作是一种将协作与信道编码相结合并通过信道编码来运作的机制，这与基于重复的方法不同。这项工作推导出了编码协作的中断概率表达式。在这项工作中，每个节点既充当数据源又充当中继，即只有活动（发送）节点可用于协助其他节点，并且每个节点在总体（源 + 中继）功率和带宽约束下运行。中断表达式证实了编码协作可实现全分集。这表明，尽管表面上有相似之处，但编码协作不同于解码转发，解码转发已被证明具有一分集。这项工作中推导出的中断概率表达式描述了不同速率下的编码性能。此外，中断概率得出的界限可以说比先前针对编码协作可用的误比特率（BER）结果更有洞察力。数值比较揭示了在各种用户间和上行链路信道条件下编码协作和各种基于重复的方法的相对优劣。
Cooperative communication is an emerging paradigm where multiple mobiles share their resources (bandwidth and power) to achieve better overall performance. Coded cooperation is a mechanism where cooperation is combined with-and operates through-channel coding, as opposed to the repetition-based methods. This work develops expressions for outage probability of coded cooperation. In this work, each node acts as both a data source as well as a relay, i.e., only active (transmitting) nodes are available to assist other nodes, and each node operates under overall (source + relay) power and bandwidth constraints. Outage expressions confirm that full diversity is achieved by coded cooperation. This shows that despite superficial similarities, coded cooperation is distinct from decode-and-forward, which has been shown to have diversity one. The outage probability expressions developed in this work characterize coded performance at various rates. Furthermore, outage probabilities yield bounds that are arguably more insightful than the bit-error rate (BER) results previously available for coded cooperation. Numerical comparisons shed light on the relative merits of coded cooperation and various repetition-based methods, under various inter-user and uplink channel conditions.