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Front. Inform. Technol. Electron. Eng.  2018, Vol. 19 Issue (11): 1432-1443    
    
Optimization of a robust collaborative-relay beamforming design for simultaneous wireless information and power transfer
Lu-lu ZHAO, Xing-long JIANG, Li-min LI, Guo-qiang ZENG, Hui-jie LIU
Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
Shanghai Engineering Center for Microsatellites, Shanghai 201210, China
College of Mathematics, Physics and Electronic Information Engineering, Wenzhou University, Wenzhou 325035, China
Optimization of a robust collaborative-relay beamforming design for simultaneous wireless information and power transfer
Lu-lu ZHAO, Xing-long JIANG, Li-min LI, Guo-qiang ZENG, Hui-jie LIU
Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
Shanghai Engineering Center for Microsatellites, Shanghai 201210, China
College of Mathematics, Physics and Electronic Information Engineering, Wenzhou University, Wenzhou 325035, China
 全文: PDF 
摘要： We investigate a collaborative-relay beamforming design for simultaneous wireless information and power
transfer. A non-robust beamforming design that assumes availability of perfect channel state information (CSI) in the
relay nodes is addressed.  In practical scenarios, CSI errors are usually inevitable; therefore, a robust collaborative-
relay beamforming design is proposed.  By applying the bisection method and the semidefinite relaxation (SDR)
technique, the non-convex optimization problems of both non-robust and robust beamforming designs can be solved.
Moreover, the solution returned by the SDR technique may not always be rank-one; thus, an iterative sub-gradient
method is presented to acquire the rank-one solution. Simulation results show that under an imperfect CSI case, the
proposed robust beamforming design can obtain a better performance than the non-robust one.
关键词： Simultaneous wireless information and power transfer;  Channel state information;  Robust beamforming;  Semidefinite relaxation;  Iterative sub-gradient    
Abstract: We investigate a collaborative-relay beamforming design for simultaneous wireless information and power
transfer. A non-robust beamforming design that assumes availability of perfect channel state information (CSI) in the
relay nodes is addressed.  In practical scenarios, CSI errors are usually inevitable; therefore, a robust collaborative-
relay beamforming design is proposed.  By applying the bisection method and the semidefinite relaxation (SDR)
technique, the non-convex optimization problems of both non-robust and robust beamforming designs can be solved.
Moreover, the solution returned by the SDR technique may not always be rank-one; thus, an iterative sub-gradient
method is presented to acquire the rank-one solution. Simulation results show that under an imperfect CSI case, the
proposed robust beamforming design can obtain a better performance than the non-robust one.
Key words: Simultaneous wireless information and power transfer    Channel state information    Robust beamforming    Semidefinite relaxation    Iterative sub-gradient
收稿日期: 2016-05-19 出版日期: 2019-06-13
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Lu-lu ZHAO
Xing-long JIANG
Li-min LI
Guo-qiang ZENG
Hui-jie LIU

引用本文:

Lu-lu ZHAO, Xing-long JIANG, Li-min LI, Guo-qiang ZENG, Hui-jie LIU. Optimization of a robust collaborative-relay beamforming design for simultaneous wireless information and power transfer. Front. Inform. Technol. Electron. Eng., 2018, 19(11): 1432-1443.

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http://www.zjujournals.com/xueshu/fitee/CN/    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2018/V19/I11/1432

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