Transmit Power Minimization for Outage-Constrained Relay Selection over Rayleigh-Fading Channels
Transmit Power Minimization for Outage-Constrained Relay Selection over Rayleigh-Fading Channels
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DOI：
10.1109/lcomm.2014.2332163
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
L. Qian;Yuan Wu;Q. Chen
中科院分区：
文献类型：
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作者：
L. Qian;Yuan Wu;Q. Chen
本文研究了瑞利衰落信道下双跳解码转发（DF）中继网络的中继选择方案。特别是，我们首先提供的问题配方，最大限度地减少总的发射功率消耗的约束下，最大可容忍的中断概率和有限的功率时，中继k合作。然后，我们推导出一个封闭形式的最优功率分配的表达式，解决了这个优化问题。基于推导出的闭合表达式，我们可以快速选择最好的中继，消耗最小的功率在合作的传输。
This letter studies the relay selection scheme for dual-hop decode-and-forward (DF) relay networks over Rayleigh fading channels. In particular, we first provide the problem formulation that minimizes the total transmit power consumption under the constraints of maximum tolerable outage probability and limited power when relay k cooperates. We then derive a closed-form expression of optimal power allocation that solves this optimization problem. Based on the derived closed-form expression, we can quickly select the best relay that consumes the minimum power during the cooperation of transmission.