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 · IEICE Transactions on Communications · 2012
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.