标题：Robust MISO Beamforming With Cooperative Jamming for Secure Transmission From Perspectives of QoS and Secrecy Rate
作者：Ma, Hui; Cheng, Julian; Wang, Xianfu; Ma, Piming
作者机构：[Ma, Hui; Cheng, Julian] Univ British Columbia, Sch Engn, Kelowna, BC V1V 1V7, Canada.; [Wang, Xianfu] Univ British Columbia, Dept Math, Irving K Ba 更多
来源：IEEE TRANSACTIONS ON COMMUNICATIONS
关键词：Cooperative jamming; multiple-input single-output; quality of service;; secrecy rate; secure transmit beam-forming; semidefinite programming
摘要：Robust quality-of-service (QoS)-based and secrecy rate-based secure transmission designs are investigated for a multiple-input single-output system with multiple eavesdroppers and a cooperative jammer. Two scenarios are considered: (a) eavesdroppers' channel state information (ECSI) is available and (b) ECSI is unavailable. In scenario (a), a QoS-based design is considered to minimize the worst case signal-to-interference-andnoise ratio at the eavesdroppers and to guarantee the QoS of the legitimate receiver. A secrecy rate-based design is also studied where the worst case secrecy rate is maximized. In scenario (b), a QoS-based design is considered to maximize the power of jamming signals under the QoS constraint of the legitimate receiver, and the secrecy rate-based design is not applicable. In all these designs, we jointly optimize the transmit beamforming vector and the covariance matrix of jamming signals under individual power constraints. As the optimization problems are non-convex, we propose an algorithm for each problem through semidefinite relaxation. Our analysis and simulation results show that, even though the linear precoding scheme in our designs is transmit beamforming rather than the general rank transmit covariance, this does not cause any loss of optimality.