Asymptotic Performances of Near-Optimal Selective Distributed Beamforming for Two-Way Relaying with Partial Channel State Information
Asymptotic Performances of Near-Optimal Selective Distributed Beamforming for Two-Way Relaying with Partial Channel State Information
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DOI：
10.1109/lcomm.2011.030911.102399
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发表时间：
2011-03
期刊：
影响因子：
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通讯作者：
Jung-Bin Kim;In-Ho Lee;Dongwoo Kim;Jaesung Lim
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文献类型：
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作者：
Jung-Bin Kim;In-Ho Lee;Dongwoo Kim;Jaesung Lim
在这封信中，我们认为分布式波束形成（DBF）技术的双向中继网络中，两个源交换信息，通过K个中间中继下的聚合功率约束。特别是，我们构造了一个简单的选择性DBF，可以在每个中继部分信道状态信息（CSI）。通过渐进分析，所提出的选择性DBF可以为每个源实现完全分集增益K，并且两个源的容量之和随着log K而增加。数值研究还表明，选择DBF提供了接近最佳的性能。
In this letter, we consider distributed beamforming (DBF) techniques for a two-way relaying network in which two sources exchange information through K intermediate relays under an aggregate power constraint. Especially, we construct a simple selective DBF that can be obtained at each relay with partial channel state information (CSI). By asymptotic analysis, the proposed selective DBF is shown to achieve full diversity gain K for each source and that the sum of capacities at the two sources increases as log K. Numerical investigation also shows that the selective DBF provides near optimum performance.