能量受限全双工双向中继系统的波束成形设计

doi:10.11959/j.issn.1000-436x.2018023

Abstract

Abstract:

A beamforming design was proposed under simultaneous wireless information and power transfer (SWIPT) protocol.A utility optimization problem was considered aiming to maximize the harvested energy by jointly optimizing the beamforming matrix,the power splitting ratio at the relay and the transmit powers at the sources.Since the formulated joint optimization problem was nonconvex,it was difficult or even intractable to obtain the global optimal solution.To overcome this issue,the objective problem into three subproblems was decoupled which could be solved by the proposed semidefinite relaxation technique and the derived constraints activation solution,respectively.The solution was finally obtained with the proposed convergent iterative algorithm.Simulation results show that the proposed joint optimization scheme achieves the optimal performance.Compared with the traditional half-duplex (HD) algorithm,the proposed algorithm can obtain 2~3 times energy harvesting (EH) efficiency improvement,while the computational complexity increases slightly.

CLC Number:

TN925

Wei WANG,Liyuan AN,Guoan ZHANG,Shibing ZHANG. Beamforming design for energy-constrained full-duplex two-way relaying system[J]. Journal on Communications, 2018, 39(2): 43-52.

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References 29

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操作	全双工算法	两时隙半双工算法
求解W	40M²N²+40MN²+12M²+54N²+C_CVX+C_EVD	14N⁴+46N²+16N?4+C_CVX+C_EVD
求解{P₁,P₂}	8 M² N+20 MN²+8 M³+112 MN+4 M²+41 M+48 N?8 N²?24	32N³+44N²+66N?26
求解ρ	20 M² N+44 MN²+28M³+128 MN+55 M+54 N?12 M²?10 N²?38	34N³+46N²+65N?24

Beamforming design for energy-constrained full-duplex two-way relaying system

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