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Secure transmission via joint precoding optimization for downlink MISO NOMA
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Zhao, Nan, Li, Dongdong, Liu, Mingqian, Cao, Yang, Chen, Yunfei, Ding, Zhiguo and Wang, Xianbin (2019) Secure transmission via joint precoding optimization for downlink MISO NOMA. IEEE Transactions on Vehicular Technology . (In Press)
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WRAP-secure-transmission-joint-precoding-Chen-2019.pdf - Accepted Version - Requires a PDF viewer. Download (2340Kb) | Preview |
Abstract
Non-orthogonal multiple access (NOMA) is a prospective technology for radio resource constrained future mobile networks. However, NOMA users far from base station (BS) tend to be more susceptible to eavesdropping because they are allocated more transmit power. In this paper, we aim to jointly optimize the precoding vectors at BS to ensure the legitimate security in a downlink multiple-input single-output (MISO) NOMA network. When the eavesdropping channel state information (CSI) is available at BS, we can maximize the sum secrecy rate by joint precoding optimization. Owing to its non-convexity, the problem is converted into a convex one, which is solved by a second-order cone programming based iterative algorithm. When the CSI of the eavesdropping channel is not available, we first consider the case that the secure user is not the farthest from BS, and the transmit power of the farther users is maximized via joint precoding optimization to guarantee its security. Then, we consider the case when the farthest user from BS requires secure transmission, and the modified successive interference cancellation order and joint precoding optimization can be adopted to ensure its security. Similar method can be exploited to solve the two non-convex problems when the CSI is unknown. Simulation results demonstrate that the proposed schemes can improve the security performance for MISO NOMA systems effectively, with and without eavesdropping CSI.
| Item Type: | Journal Article | ||||||||||||||||||
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| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||||||||||||||
| Divisions: | Faculty of Science > Engineering | ||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Wireless communication systems -- Security measures | ||||||||||||||||||
| Journal or Publication Title: | IEEE Transactions on Vehicular Technology | ||||||||||||||||||
| Publisher: | IEEE | ||||||||||||||||||
| ISSN: | 0018-9545 | ||||||||||||||||||
| Official Date: | 27 May 2019 | ||||||||||||||||||
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| Date of first compliant deposit: | 28 May 2019 | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | In Press | ||||||||||||||||||
| Publisher Statement: | © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. | ||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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