Allocation of transmit power in spatially-correlated dual-hop MIMO relay channels

Authors:
Ah-Young Kim;Hee-Nam Cho;Jin-Woo Lee;Yong-Hwan Lee
Affiliations:
School of Electrical Engineering and INMC, Seoul National University, Seoul, Korea;School of Electrical Engineering and INMC, Seoul National University, Seoul, Korea;School of Electrical Engineering and INMC, Seoul National University, Seoul, Korea;School of Electrical Engineering and INMC, Seoul National University, Seoul, Korea
Venue:
ISCIT'09 Proceedings of the 9th international conference on Communications and information technologies
Year:
2009

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Abstract

This paper considers power allocation in spatially-correlated dual-hop multiple-input multiple-output (MIMO) relay channels under power constraint for each hop channel. The proposed scheme allocates the transmit power considering the spatial correlation as well as the average signal-to-noise ratio (SNR) of dual-hop MIMO relay channels. By means of upperbound analysis, the proposed scheme can minimize the transmit power, while maximizing the end-to-end capacity of spatially-correlated MIMO channel. Simulation results show that the proposed scheme can provide performance enhancement over the SNR-based scheme in spatially-correlated channel environments.