Two-Way MIMO Relay Precoder Design with Channel State Information
Two-Way MIMO Relay Precoder Design with Channel State Information
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DOI：
10.1109/tcomm.2010.12.100002
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发表时间：
2010-12
期刊：
影响因子：
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通讯作者：
Chunguo Li;Luxi Yang;Weiping Zhu
中科院分区：
文献类型：
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作者：
Chunguo Li;Luxi Yang;Weiping Zhu
针对多输入多输出（MIMO）分布式协作中继系统，设计了一种双向中继预编码器。一个关于（w.r.t.）中继预编码器被公式化用于最一般的中继和天线场景，即，多个中继，每个中继具有多个天线。示出了由于双向分布式中继机制的困难以及中继预编码矩阵的块对角性质，该优化问题不能通过现有的单向中继方法来解决。然后证明，与完整的信道状态信息可在继电器，基本的问题可以转换为凸优化w.r.t.仅中继预编码矩阵的非零项，使得拉格朗日乘子方法可应用于中继预编码器设计，从而得到封闭形式的中继预编码解决方案。仿真研究证明了所提出的双向中继方案的上级性能。
In this paper, a two-way relay precoder is designed for multiple-input multiple-output (MIMO) distributed cooperative relay systems. A constrained optimization problem with respect to (w.r.t.) the relay precoder is formulated for the most general relay and antenna scenario, namely, multiple relays each with multiple antennas, It is shown that due to the difficulty of two-way distributed relaying mechanism as well as the block-diagonal nature of the relay precoding matrix, this optimization problem cannot be solved by existing one-way relaying methods. It is then proved that with full channel state information available at relays, the underlying problem can be converted to a convex optimization w.r.t. the non-zero entries of the relay precoding matrix only, such that the Lagrangian multiplier method is applicable to the relay precoder design, leading to a closed-form relay precoding solution. A simulation study is conducted to justify the superior performance of the proposed two-way relaying scheme.