瑞利相关衰落下MIMO系统信道容量

Capacity of MIMO Channel Under Rayleigh Correlated Fading

文中研究了瑞利相关衰落条件下MIMO系统的信道容量。建立了相关衰落条件下MIMO系统的数学模型,讨论了相关衰落对信道容量的影响,对未知发射机状态信息和已知发射机状态信息下的信道容量进行了理论分析与仿真。结果表明,由于相关衰落而损失的信道容量会随着发射和接收天线数目以及相关系数的增加而增大。在天线数较多而信噪比较小时,根据注水原理进行功率分配的方法可显著提高信道容量。

In this paper,we study the Capacity of MIMO Channel under Rayleigh Correlated Fading.The correlated fa- ding model is established and the impact of fading correlation on capacity of MIMO channel is discussed.Then,we ana- lyze the capacity of MIMO channel by the unknown and known channel information to transmitter respectively and dis- cussed the simulation result.The results indicate that the loss of capacity due to correlation is increases with an increase in correlation coefficient and the number of antennas at both the transmitter and the receiver.Moreover,in the case of low SNR and large number of the antennas,using the waterpouring power allocation can improve the capacity of the MIMO channel evidently.