Joint Power Allocation and Beam Forming for Energy-Efficient Multi-Way Multi-Antenna Relay Networks

International Journal of Computer Trends and Technology (IJCTT)          
© 2018 by IJCTT Journal
Volume-60 Number-2
Year of Publication : 2018
Authors : L.K.Wiseling lazarus, Dr.P.Venkadesh, J.P.Jayan
DOI :  10.14445/22312803/IJCTT-V60P117


L.K.Wiseling lazarus, Dr.P.Venkadesh, J.P.Jayan "Joint Power Allocation and Beam Forming for Energy-Efficient Multi-Way Multi-Antenna Relay Networks". International Journal of Computer Trends and Technology (IJCTT) V60(2):111-114 June 2018. ISSN:2231-2803. Published by Seventh Sense Research Group.

The joint design of user power allocation and relay beamforming in relaying communications, in which multiple pairs of single-antenna users exchange information with each other via multiple-antenna relays in two time slots. All users transmit their signals to the relays in the first time slot while the relays broadcast the beamformed signals to all users in the second time slot. The aim is to maximize the system’s energy efficiency (EE) subject to quality-of-service (QoS) constraints in terms of exchange throughput requirements. The multi-way relaying strategy consists of one multiple access phase and multiple broadcast phases. We jointly design relay beamforming matrices and users’ linear processing receivers in the broadcast phases to maximize the minimum signal-to-interference-and-noise ratio (SINR) under the relay power budget. the MRC receiver leads to a local maximum for the original joint optimization problem, while the ZF receiver has the computational advantage with a lower complexity.

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Energy Efficiency, Multiple antenna, MRC receiver, ZF efficiency