Joint Beamforming and User Selection in Multicast Downlink Channel under Secrecy-Outage Constraint
Joint Beamforming and User Selection in Multicast Downlink Channel under Secrecy-Outage Constraint
复制标题
保密中断约束下多播下行信道的联合波束成形和用户选择
DOI：
10.1109/lcomm.2013.111213.132253
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发表时间：
2014-01-01
期刊：
影响因子：
--
通讯作者：
Wang, Xiyuan
中科院分区：
文献类型：
--
作者：
Liu, Xin;Gao, Feifei;Wang, Xiyuan
本文研究了多播MISO窃听信道中的波束形成和用户选择问题，其中具有N-t个天线的基站(BS)向M个合法用户(BOB)广播一条共同的机密消息，而N个非授权用户(EVE)试图窃听该消息。我们以最大化Bobs的最小保密性-中断率为目标，提出了一种迭代逐次凸逼近(SCA)算法来解决原始的非凸问题。我们进一步发展了联合半定规划(SDP)和SCA算法来寻找合法用户满足其需求的可行子集。最后给出了仿真结果，对所提出的方法进行了评估。
In this letter, we study the beamforming and user selection problem in multicast MISO wiretap-channel, where a base station (BS) with N-t antennas broadcasts a common confidential message to M legitimate users (Bobs) and N unauthorized users (Eves) attempt to eavesdrop the message. We target at maximizing the minimum secrecy-outage rate of Bobs and propose an iterative successive convex approximation (SCA) algorithm to tackle the original nonconvex problem. We further develop joint semidefinite programming (SDP) and SCA algorithm to find a feasible subset where legitimate users are guaranteed to their requirements. Simulation results are provided to evaluate the proposed approaches.