Employing Power Allocation to Enhance Zero Forcing Scheme Advantages over Multi-Antenna Multiple Relay Networks

Abolfazl Falahati, Y. Attar Izi

Department of Electrical Engineering (DCCS Lab), Iran University of Science and Technology, Tehran, Iran.

DOI: 10.4236/ijcns.2012.511077                

Abstract

A multi-antenna multiple relay (MAMR) network is considered and a variation of two-hop zero-forcing amplify-forward relaying method is proposed. Deploying ZF method together with application of diagonal power allocation matrices at the relays, it is shown that the overall MAMR network is simplified to M independent single antenna multiple relay (SAMR) networks, where M is the number of source and destination antennas. This enables to incorporate network beamforming proposed for SAMR networks. Accordingly, using the BER as the performance metric, we present simulation results to show the proposed approach outperforms the common ZF method addressed in the literature.

Keywords

Cooperative Communication; MIMO; Multiple Antennas Multiple Relay (MAMR) Networks; Zero Forcing; Power Allocation

Conflicts of Interest

The authors declare no conflicts of interest.

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