Research Article
MIMO System Capacity with Imperfect Feedback Channel
@INPROCEEDINGS{10.1109/ChinaCom.2012.6417515, author={Wen Zhou and Caihong Kai and Xutao Li}, title={MIMO System Capacity with Imperfect Feedback Channel}, proceedings={7th International Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2012}, month={10}, keywords={mimo feedback snr closed-loop capacity}, doi={10.1109/ChinaCom.2012.6417515} }- Wen Zhou
Caihong Kai
Xutao Li
Year: 2012
MIMO System Capacity with Imperfect Feedback Channel
CHINACOM
IEEE
DOI: 10.1109/ChinaCom.2012.6417515
Abstract
The capacity for multiple-input multiple-output (MIMO) with imperfect feedback channel is investigated. The expression of closed-loop MIMO capacity with imperfect feedback has been derived. A system capacity indicator, the feedback signal to noise ratio (SNR), that is used to measure the capacity gain of the closed-loop capacity over that of the open-loop capacity, has been proposed and investigated. Based on the derived closed form expression for the closed-loop MIMO capacity, the lower threshold of feedback SNR is derived and subsequently examined by numerical method. Numerical results show that the lower threshold of feedback SNR is increased with increasing antenna numbers and increasing MIMO system SNR.
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