Diversity-multiplexing tradeoff analysis and optimization for OFDM-based multihop relaying systems
1 Institute of Communications Engineering, PLA University of Science and Technology, Nanjing, China
2 , Nanjing University of Posts and Telecommunication, Nanjing, China
EURASIP Journal on Wireless Communications and Networking 2012, 2012:245 doi:10.1186/1687-1499-2012-245Published: 7 August 2012
In this article, we consider a single-antenna orthogonal frequency division multiplexing-based multihop relaying system over frequency selective fading channels employing subcarrier grouping and linear constellation precoding at the source, and linear detection at the destination. We derive closed-form expressions of the diversity-multiplexing tradeoff relation, and propose the optimal precoder design and symbol loading strategy to achieve the optimal diversity performance. Simulation results are presented to verify our theoretical analysis.