Optimal transmit strategy of a two-hop decode-and-forward MIMO relay system with mean and covariance feedback

Authors:
Zhiyong Chen;Hui Liu;Wenbo Wang
Affiliations:
Key Laboratory of Universal Wireless Communications for Ministry of Education, Beijing University of Posts and Telecommunications, Beijing, China;Department of Electrical Engineering, University of Washington, Seattle, WA;Key Laboratory of Universal Wireless Communications for Ministry of Education, Beijing University of Posts and Telecommunications, Beijing, China
Venue:
IEEE Communications Letters
Year:
2010

Citing 8
Cited 0

Subcarrier pairing for amplify-and-forward and decode-and-forward OFDM relay links

IEEE Communications Letters
Optimality of beamforming in fading MIMO multiple access channels

IEEE Transactions on Communications
On the Gaussian MIMO relay channel with full channel state information

IEEE Transactions on Signal Processing
MIMO Relaying With Linear Processing for Multiuser Transmission in Fixed Relay Networks

IEEE Transactions on Signal Processing
Channel capacity and capacity-range of beamforming in MIMO wireless systems under correlated fading with covariance feedback

IEEE Transactions on Wireless Communications
Distributed Adaptive Power Allocation for Wireless Relay Networks

IEEE Transactions on Wireless Communications
Cooperative diversity in wireless networks: Efficient protocols and outage behavior

IEEE Transactions on Information Theory
On the capacity of MIMO relay channels

IEEE Transactions on Information Theory

Quantified Score

Hi-index	0.00

Visualization

Abstract

This letter proposes an optimal transmit strategy to maximize the cut-set bound on the ergodic capacity for the two-hop decode-and-forward (DF) MIMO relay system with the mean and covariance feedback. Upon the analysis of the ergodic capacity, we show that the optimal transmit beamforming directions in the first hop are along the eigenvectors of the difference between the source-relay channel and the source-destination channel. In the second hop, the relay should transmit along the eigenvectors of the relay-destination channel. Using the optimization theory, we then investigate the optimal power allocation for the source and the relay with the constraint of the total transmit power. Simulation results are then presented for illustration.