On Achievable Diversity Multiplexing Tradeoff in MIMO Nonorthogonal Amplify-and-Forward Cooperative Channel with Quantized Channel State Feedback

Xiaodong SUN  Shihua ZHU  Zhenjie FENG  Hui HUI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E95-B   No.11   pp.3576-3579
Publication Date: 2012/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.3576
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
Keyword: 
multiple-input multiple-output (MIMO),  nonorthogonal amplify-and-forward (NAF),  channel state feedback,  power control,  diversity-multiplexing tradeoff (DMT),  

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Summary: 
In this letter, we derive a lower bound on the diversity multiplexing tradeoff (DMT) in multiple-input multiple-output (MIMO) nonorthogonal amplify-and-forward (NAF) cooperative channels with resolution-constrained channel state feedback. It is shown that power control based on the feedback improves the DMT performance significantly in contrast to the no-feedback case. For instance, the maximum diversity increase is exponential in K with K-level feedback.