SPC12-5: Relay Selection in Multi-Node Cooperative Communications: When to Cooperate and Whom to Cooperate with?
SPC12-5: Relay Selection in Multi-Node Cooperative Communications: When to Cooperate and Whom to Cooperate with?
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DOI：
10.1109/glocom.2006.601
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发表时间：
2006-11
期刊：
影响因子：
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通讯作者：
A. Ibrahim;A. Sadek;Weifeng Su;K. Liu
中科院分区：
文献类型：
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作者：
A. Ibrahim;A. Sadek;Weifeng Su;K. Liu
本文提出了一种新的协作通信协议，该协议在保证全分集阶数的同时实现了高带宽利用率。该方案考虑中继选择通过可用的部分信道状态信息（CSI）在源和中继。更准确地说，源确定何时需要与任意N个中继中的仅一个中继协作，以及在协作的情况下与哪个中继协作，即，“什么时候合作？与谁合作？".在协作的情况下，源采用最优中继，其具有最大的瞬时标度谐波平均函数的源中继和中继目的地信道的增益。对于对称的情况下，我们证明，充分的多样性得到保证，并实现了显着增加的带宽效率。此外，我们展示了可实现的带宽效率和相应的错误率之间的权衡。最后，通过计算机仿真验证了所得到的分析结果。
In this paper, we propose a new cooperative communication protocol, which achieves high bandwidth efficiency while guaranteeing full diversity order. The proposed scheme considers relay selection via the available partial channel state information (CSI) at the source and the relays. More precisely, the source determines when it needs to cooperate with one relay only among arbitrary N relays and which relay to cooperate with in case of cooperation, i.e., "When to cooperate?" and "Whom to cooperate with?". In case of cooperation, the source employs the optimal relay, which has the maximum instantaneous scaled harmonic mean function of its source-relay and relay-destination channels' gains. For the symmetric scenario, we prove that full diversity is guaranteed and that a significant increase of the bandwidth efficiency is achieved. Furthermore, we show the tradeoff between the achievable bandwidth efficiency and the corresponding error rate. Finally, the obtained analytical results are verified through computer simulations.