Resource Allocation for Wireless Powered Multi-Pair Massive Antenna Relaying With Zero Forcing Beamforming

作者：Sacarelo Gerardo; Tuyet Van Thi Le; Kim Yun Hee

来源：IEEE Communications Letters, 2016, 20(11): 2316-2319.

DOI：10.1109/LCOMM.2016.2602201

• Decode-and-Forward
• Massive MIMO
• Resource Allocation
• Wireless Powered Communication
• Zero-Forcing Beamforming

We consider resource allocation for a multi-pair decode-and-forward relay network, where a massive antenna relay powers the sources through energy beamforming (BF) in one phase and assists wireless information transfer (WIT) through zero-forcing receive and transmit BF in two subsequent phases. For the network with imperfect channel state information, we analyze the average achievable rates of the pairs and maximize the minimum of the rates through relay power allocation (PA) in energy and transmit BF and time allocation (TA) to the three phases. The optimal PA policy, derived in a closed form, improves the minimum rate in each WIT phase by balancing asymmetric link qualities among the devices while the TA solution, either optimal or suboptimal, leverages the performance significantly by balancing the rates of the two WIT phases.

• 出版日期2016-11