空间相关MIMO信道天线选择系统闭合容量式

在空间瑞利相关信道下,笔者推导了混合选择/多输入多输出系统(H-S/MIMO)信道容量的精确表达式。以2发送天线和2/3接收天线的MIMO系统为模型,使用MATLAB对该系统进行了仿真。结果表明,理论分析与仿真曲线相吻合,进一步说明文中理论分析的正确性。

Closed-Form Capacity Expression for Transmit Antenna Selection Systems with Correlated Fading Channels

In this paper, the exact closed-form capacity expression for a hybrid selection/MIMO (H-S/MIMO) system in the spatial correlated Rayleigh fading channels is investigated. There are two assumptions in this work, one is that the antenna selection at the transmitter is based on the criterion that maximizes the received signal power and only one transmit antenna is chosen for a transmission interval, the other is that the spatial correlation is present at both ends of wireless communications link. Based on the two assumptions, the characteristic function (CF) method is used to analyze the capacity of the H-S/MIMO systems. Thus a closed-form capacity expression is achieve. A special system, with two transmit-antennas and two/three receive-antennas, is taken as an example to validate our theoretic analysis. The facts indicate that the theoretic results are very close to the simulation resrlts.