Robust beamforming for multiuser MISO interference channel with energy harvesting constraint

• Published in: 2015 10th International Conference on Communications and Networking in China (ChinaCom) pp. 126 - 131
• Main Authors: Zhengyu Zhu, Yuanyuan Zhang, Zhongyong Wang, Yanbin Zhang, Xiangchuan Gao, Zheng Chu
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.08.2015
• Subjects: Array signal processing; Covariance matrices; energy harvesting (EH); Interference; MISO-IFC; power splitting; Receivers; robust beamforming; Robustness; Signal to noise ratio; Simultaneous wireless information and power transfer (SWIPT); Uncertainty
• DOI: 10.1109/CHINACOM.2015.7497923

In this paper, we study the robust transmit beamforming and receive power splitting design for simultaneous wireless information and power transfer in multiuser multiple-input single-output interference channel with imperfect channel-state information at the transmitter. We consider two types of receivers, namely Type I and Type II receivers according to the ability of eliminating the interference from received signals. Following the worst-case model, we minimize the average total transmit power subject to a set of energy harvesting constraint and SINR constraint for Type I receiver or SNR constraint for Type II receiver, respectively. Based on the Lagrangian multiplier method, we propose a lower and upper bounds algorithm that is able to achieve a global optimum for Type I receiver. For Type II receiver, we transform this problem into a relaxed semidefinite programming problem, which can be solved efficiently. It is shown from simulation results that our proposed method outperform the non-robust scheme.