Switched diversity strategies for dual-hop amplify-and- forward relaying systems
Switched diversity strategies for dual-hop amplify-and- forward relaying systems
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DOI：
10.1049/iet-com.2011.0725
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发表时间：
2012-08
期刊：
影响因子：
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通讯作者：
Fakhreddine Gaaloul;R. Radaydeh;Mohamed-Slim Alouini
中科院分区：
文献类型：
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作者：
Fakhreddine Gaaloul;R. Radaydeh;Mohamed-Slim Alouini
本文研究了双跳放大转发中继网络中不同的接收单分支交换机分集方案。具体而言，采用了三种接收处理算法，分别采用任意选择算法、切换算法和后检最佳分支选择切换算法来选择接收分支。接收分支的识别是针对两种不同的系统模型进行的。对于第一种模型，将单天线中继站与多天线收发器结合使用，其中处理独立于第一跳衰落条件进行。第二个模型建议使用单天线中继的并行部署将信息从多天线发射机传输到单天线接收机，其中有源中继站是根据预组合的端到端衰落条件确定的。在第一跳上的各种传输场景的性能比较使用新的公式统计组合信噪比。仿真结果验证了数学推导和数值计算的正确性。
This study investigates different receive single-branch switch-based diversity schemes for dual-hop amplify-and-forward relaying networks. Specifically, three receive processing algorithms are adopted, in which the receive branch is selected using the arbitrary selection algorithm, the switching algorithm, or the switching algorithm with post-examining best branch selection. The identification of the receive branch is carried out for two different system models. For the first model, a single-antenna relaying station is used in conjunction with a multiple-antenna transceiver, where the processing is performed independently of the first hop-fading conditions. The second model suggests the use of parallel deployment of single-antenna relays to transfer information from a multiple-antenna transmitter to a single-antenna receiver, where the active relaying station is determined based on the pre-combining end-to-end fading conditions. Performance comparisons for various transmission scenarios on the first hop are presented using new formulations for the statistics of the combined signal-to-noise ratio. Simulation results are also provided to validate the mathematical development and to verify the numerical computations.