Optimal antenna selection based on capacity maximization for MIMO systems in correlated channels
Optimal antenna selection based on capacity maximization for MIMO systems in correlated channels
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DOI：
10.1109/tcomm.2006.869778
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发表时间：
2006-03
影响因子：
8.3
通讯作者：
L. Dai;S. Sfar;K. Letaief
中科院分区：
文献类型：
--
作者：
L. Dai;S. Sfar;K. Letaief
最近的工作表明，在发射机和接收机处具有多个天线的多输入多输出（MIMO）系统能够实现大的容量提高。在这样的系统中，期望选择可用天线的子集以便减少射频（RF）链的数量。本文研究了相关信道下的天线选择问题。我们考虑一个窄带通信系统与M个发射和N个接收天线。我们提出的标准，用于选择最佳的L/sub t/出M发送和L/sub r/出N接收天线的容量最大化方面，假设只有长期的信道统计，而不是瞬时的信道状态信息，是已知的。仿真将被用来验证我们的理论分析，并证明所需的RF链的数量可以显着减少使用我们提出的选择策略，同时实现更好的性能比传统的MIMO系统没有天线选择。
Recent work has shown that multiple-input multiple-output (MIMO) systems with multiple antennas at both the transmitter and receiver are able to achieve great capacity improvement. In such systems, it is desirable to select a subset of the available antennas so as to reduce the number of radio frequency (RF) chains. This paper addresses the problem of antenna selection in correlated channels. We consider a narrowband communication system with M transmit and N receive antennas. We present the criterion for selecting the optimal L/sub t/ out of M transmit and L/sub r/ out of N receive antennas in terms of capacity maximization, assuming that only the long-term channel statistics, instead of the instantaneous channel-state information, are known. Simulations will be used to validate our theoretical analysis and demonstrate that the number of required RF chains can be significantly decreased using our proposed selection strategy, while achieving even better performance than the conventional MIMO system without antenna selection.