Power allocation strategies with per-antenna for secure directional modulation

Mingyuan Jiao; Zhihui Ye; Haidong Xu

doi:10.1117/12.2628048

18 February 2022 Power allocation strategies with per-antenna for secure directional modulation

Mingyuan Jiao, Zhihui Ye, Haidong Xu

Proceedings Volume 12162, International Conference on High Performance Computing and Communication (HPCCE 2021); 121620A (2022) https://doi.org/10.1117/12.2628048
Event: 2021 International Conference on High Performance Computing and Communication, 2021, Guangzhou, China

Abstract

In directional modulation (DM) networks, conventional power allocation strategy is actually an equal-power allocation method. However, in practice, each antenna is equipped with its own power amplifier and is restricted. This paper considers a more practical situation that the power of each antenna sent to the receiver is different. Here, we study the optimal power allocation (OPA) strategy with multiple-input single-output (MISO) in DM communication system. Explicitly, we first formulate a secrecy rate (SR) maximization problem subject to the total power constraint, with designing the useful information power vector and artificial noise covariance matrix. For the non-convex problem, we propose the maximizing secrecy rate based on successive convex approximation (Max-SR-SCA) method to solve it. Subsequently, in order to reduce the computational complexity, we propose the maximizing product of signal-to-leakage-plus-noise-ratio (SLNR) and artificial-noise-to-leakage-plus-noise-ratio (ANLNR) (Max-SLNR-ANLNR) method to obtain a suboptimal solution. Simulation results show that the proposed two methods have better SR performance than the conventional PA factor scheme. In addition, the proposed Max-SLNR-ANLNR method forms a single energy main peak at Eve position, which indicates it realizes precise jamming.

Citation Download Citation

Mingyuan Jiao, Zhihui Ye, and Haidong Xu "Power allocation strategies with per-antenna for secure directional modulation", Proc. SPIE 12162, International Conference on High Performance Computing and Communication (HPCCE 2021), 121620A (18 February 2022); https://doi.org/10.1117/12.2628048

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KEYWORDS

Antennas

Modulation

Signal to noise ratio

Amplifiers

Convex optimization

Orthogonal frequency division multiplexing

Phase shifts

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