Capacity of MIMO Rician channels
Capacity of MIMO Rician channels
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DOI：
10.1109/twc.2006.1576535
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发表时间：
2006-01-01
影响因子：
10.4
通讯作者：
Alouini, MS
中科院分区：
文献类型：
--
作者：
Kang, M;Alouini, MS
本文给出了在接收端假定完美信道状态信息（CSI）而发送端既没有瞬时CSI也没有统计CSI的情况下，多输入多输出（MIMO）信道容量的精确计算结果。首先推导了在衰落系数相互独立但不一定完全相同的情况下，MIMO信道平均互信息率的精确表达式；结果为独立同分布（i.i.d）。作为特例，还得到了MIMO信道和瑞利信道。这些结果是用一种不同于Telatar在瑞利案件中使用的方法得出的。利用高斯近似法得到了MI的互补累积分布函数（CCDF）。MI的CDF可以作为非遍历MIMO信道中断概率的上界。数值结果证实，对于固定的信道增益，由于缺乏散射，强视距分量会降低信道容量。
This paper presents exact results on the capacity of multiple-input-multiple-output (MIMO) Rician channels when perfect channel state information (CSI) is assumed at the receiver but the transmitter has neither instantaneous nor statistical CSI. It first derives the exact expression for the average mutual information (MI) rate of MIMO Rician fading channels when the fading coefficients are independent but not necessarily identically distributed. The results for the independent and identically distributed (i.i.d.) MIMO Rician and Rayleigh fading channels are also obtained as special cases. These results are derived using a different approach than the one used by Telatar for the i.i.d. Rayleigh case. The complementary cumulative distribution function (CCDF) of the MI is also obtained using a Gaussian approximation. The CDF of MI can serve as an upper bound to the outage probability of nonergodic MIMO Rician channels. Numerical results confirm that for a fixed channel gain, a strong line-of-sight component decreases the channel capacity due to the lack of scattering.