On the Ergodic Capacity of Rank-$1$ Ricean-Fading MIMO Channels

2007 ◽  
Vol 53 (2) ◽  
pp. 502-517 ◽  
Author(s):  
Shi Jin ◽  
Xiqi Gao ◽  
Xiaohu You
Keyword(s):  
Ergodic Capacity ◽  
Mimo Channels ◽  
Ricean Fading

On the Capacity of MIMO Channels with Outdated Channel State Information

2011 ◽  
Vol 204-210 ◽  
pp. 2053-2056
Author(s):  
Ying Li ◽  
Yi Jun Zhu ◽  
Lan Ma ◽  
Yao Zhu
Keyword(s):  
Fading Channels ◽  
Channel State Information ◽  
Multiple Input Multiple Output ◽  
Ergodic Capacity ◽  
Mimo Channel ◽  
Wide Sense ◽  
Mimo Channels ◽  
Channel State ◽  
State Information ◽  
Input Multiple Output

A Multiple-input multiple-output (MIMO) time-varying flat fading channel is considered. The transmitter obtained the channel state information (CSI) relying on the reciprocity principle or by the feedback from the receiver. Thus, channel state information at the transmitter (CSIT) is outdated due to the delay between the estimation of the channel and the transmission of the data. In order to achieve the maximum channel capacity, the transmitter linearly precoded the signal before transmission based on the outdated CSIT. Under the assumptions of wide-sense stationary uncorrelated scattering Rayleigh fading channels and Jake’s model, the instantaneous mutual information and ergodic capacity is derived for MIMO channels with outdated CSIT. The information outage probability of MIMO channel with outdated CSIT is also presented.

scholarly journals Construction and Capacity Analysis of High-Rank LoS MIMO Channels in High Speed Railway Scenarios

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Jingya Yang ◽  
Bo Ai ◽  
Zhangdui Zhong
Keyword(s):  
Antenna Arrays ◽  
High Speed ◽  
Multiple Input Multiple Output ◽  
Ergodic Capacity ◽  
High Rank ◽  
Mimo Channels ◽  
Optimal Point ◽  
High Speed Railway ◽  
Maximum Capacity ◽  
Low Sensitivity

The validity of the maximum capacity criterion applied to realize high-rank line-of-sight (LoS) multiple-input multiple-output (MIMO) channels is investigated for high speed railway scenarios. Performance is evaluated by ergodic capacity. Numerical results demonstrate that by simply adjusting antenna spacing according to the maximum capacity criterion, significant capacity gains are achievable. We find relatively low sensitivity of the system to displacements from the optimal point and angle in relatively short range. Thus, we present two proposals to reconfigure antenna arrays so as to maximize LoS MIMO capacity in the high speed railway scenarios

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