Antenna Power Cutback Manipulation to Optimize Relay Power Allocation over MAMR Networks Employing Zero Forcing Scheme

Authors:
Mojgan Moradi;Abolfazl Falahati
Affiliations:
Department of Electrical Engineering (DCCS Lab), Iran University of Science and Technology, Tehran, Iran;Department of Electrical Engineering (DCCS Lab), Iran University of Science and Technology, Tehran, Iran
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

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Abstract

Power allocation between relays and data streams is an important aspect of MIMO relay systems. Different methods are designed to consider weight matrices within relay channels. Commonly employed methods are based on linearly distributed multi antenna relay beamforming with match filter, zero forcing and MMSE techniques. This article proposes a cutback relay power allocation technique to design a suboptimal beamforming weight matrix by ZF---ZF method to decrease BER considerably at high SNRs. This method allocates the unused relay antenna power to others through the associated relay. This allows maximum workable power to increase; consequently the system performance is improved.