Secure Beamforming in Downlink MISO Nonorthogonal Multiple Access Systems
Secure Beamforming in Downlink MISO Nonorthogonal Multiple Access Systems
复制标题
下行链路 MISO 非正交多址系统中的安全波束成形
DOI:
10.1109/tvt.2017.2658563
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发表时间:
2017-01
影响因子:
6.8
通讯作者:
Qin Jiayin
中科院分区:
文献类型:
--
作者:
Li Yiqing;Jiang Miao;Zhang Qi;Li Quanzhong;Qin Jiayin
In this paper, we consider a cellular downlink multiple-input-single-output (MISO) nonorthogonal multiple access (NOMA) secure transmission system, where users are grouped as multiple clusters. Each cluster consists of a central user and a cell-edge user. The central user is an entrusted user, and the cell-edge user is a potential eavesdropper. We focus on the secure beamforming and power allocation design optimization problem which maximizes the sum achievable secrecy rate of central users subject to the transmit power constraint at the base station and transmission rate requirements at cell-edge users. The problem is nonconvex because of coupling optimization variables in the considered fractional quadratically constrained quadratic programming. We propose an alternating optimization-based solution and a constrained concave–convex procedure-based solution to the considered problem. Simulation results demonstrate that our proposed NOMA schemes outperform the conventional orthogonal multiple access scheme.
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影响因子:
2.5
作者:
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通讯作者:
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影响因子:
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作者:
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发表时间:
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期刊:
IEEE COMMUNICATIONS LETTERS
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