论文部分内容阅读
研究了无线通信中多天线系统的信道容量,采用并行最小均方误差(MMSE)和迫零(ZF)检测算法推导出简化接收方案下系统的容量公式,分析了系统中断概率与信噪比、天线数以及传输速率的关系。结果表明,采用MMSE检测的二发二收的MIMO系统在传输速率为4b.s-1.Hz-1的情况下,为了达到10-2的中断概率,需要20dB的发送功率;而同样接收方案的四发四收MIMO系统则只需要不到2dB的发送功率。理论分析及仿真结果均表明,采用MMSE接收的系统中断概率在一定的门限传输速率下接近采用ZF接收的系统,并且此门限传输速率随着天线数的增加而增加。
The channel capacity of multi-antenna system in wireless communication is studied. The capacity formula of the system under simplified receiving scheme is deduced by means of MMSE and ZF detection algorithms. The system interrupt probability and signal-to-noise ratio are analyzed. The number of antennas and the transfer rate. The result shows that the MIMO system with MMSE detection needs 20dB transmission power in order to reach the interrupt probability of 10-2 when the transmission rate is 4b.s-1.Hz-1. The same reception scheme The four rounds of four receive MIMO system only needs less than 2dB of transmission power. The theoretical analysis and simulation results show that the system interruption probability using MMSE reception approaches the system using ZF reception at a certain threshold transmission rate, and the threshold transmission rate increases with the increase of the number of antennas.