TY - JOUR

T1 - Joint Design of Optimal Precoding and Cooperative Jamming for Multiuser Secure Broadcast Systems

AU - Kang, Jae Mo

AU - Yang, Jun

AU - Ha, Jeongseok

AU - Kim, Il Min

N1 - Funding Information: Manuscript received March 9, 2017; revised June 7, 2017; accepted July 24, 2017. Date of publication August 3, 2017; date of current version November 10, 2017.This work was supported by the National Research Foundation of Korea under Grant NRF-2015R1A2A2A01007739 funded by the Korea Government (Minister of Science, ICT and Future Planning). The review of this paper was coordinated by Dr. M. Elkashlan. (Corresponding author: Il-Min Kim.) J-.M. Kang and I.-M. Kim are with the Department of Electrical and Computer Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada (e-mail: jaemo.kang@queensu.ca; ilmin.kim@queensu.ca). Publisher Copyright: © 1967-2012 IEEE.

PY - 2017/11

Y1 - 2017/11

N2 - A multiuser secure broadcast system is considered, where there are one multiantenna base station (BS), multiple single-antenna legitimate users, one multiantenna friendly jammer (FJ), and one multiantenna eavesdropper (Eve). We jointly design the optimal precoding matrix at the BS and the jamming covariance matrix at the FJ by minimizing the total transmit power of the BS and FJ under the signal-to-interference-plus-noise ratio constraints at the users and Eve. To solve this challenging problem, when the FJ has more antennas than the users and Eve, we first find the optimal structure of the jamming covariance matrix and, then, convert the problem into its equivalent convex form. Also, we propose an iterative algorithm to jointly design the precoding and jamming covariance matrices in all scenarios. The solution obtained by this algorithm is shown to be asymptotically optimal when the FJ has more antennas than the users and Eve. Numerical results show that the proposed schemes considerably outperform the existing schemes.

AB - A multiuser secure broadcast system is considered, where there are one multiantenna base station (BS), multiple single-antenna legitimate users, one multiantenna friendly jammer (FJ), and one multiantenna eavesdropper (Eve). We jointly design the optimal precoding matrix at the BS and the jamming covariance matrix at the FJ by minimizing the total transmit power of the BS and FJ under the signal-to-interference-plus-noise ratio constraints at the users and Eve. To solve this challenging problem, when the FJ has more antennas than the users and Eve, we first find the optimal structure of the jamming covariance matrix and, then, convert the problem into its equivalent convex form. Also, we propose an iterative algorithm to jointly design the precoding and jamming covariance matrices in all scenarios. The solution obtained by this algorithm is shown to be asymptotically optimal when the FJ has more antennas than the users and Eve. Numerical results show that the proposed schemes considerably outperform the existing schemes.

KW - Cooperative jamming

KW - multiuser system

KW - physical layer security

KW - power minimization

KW - precoding

UR - http://www.scopus.com/inward/record.url?scp=85028920208&partnerID=8YFLogxK

U2 - 10.1109/TVT.2017.2735414

DO - 10.1109/TVT.2017.2735414

M3 - Journal article

AN - SCOPUS:85028920208

VL - 66

SP - 10551

EP - 10556

JO - IEEE Transactions on Vehicular Technology

JF - IEEE Transactions on Vehicular Technology

SN - 0018-9545

IS - 11

M1 - 8000595

ER -