WFRFT-aided Power-efficient Multi-beam Directional Modulation Schemes Based on Frequency Diverse Array
Abstract
The artificial noise (AN) aided multi-beam directional modulation (DM) technology is capable of wireless physical layer secure (PLS) transmissions for multiple desired receivers in free space. The application of AN, however, makes it less power-efficient for such a DM system. To address this problem, the weighted fractional Fourier transform (WFRFT) technology is employed in this paper to achieve power-efficient multi-beam DM transmissions. Specifically, a power-efficient multi-beam WFRFT-DM scheme with cooperative receivers and a power-efficient multi-beam WFRFT-DM scheme with independent receivers are proposed based on frequency diverse array (FDA), respectively. The bit error rate (BER), secrecy rate, and robustness of the proposed multi-beam WFRFT-DM schemes are analyzed. Simulations demonstrate that 1) the proposed multi-beam WFRFT-DM schemes are more power-efficient than the conventional multi-beam AN-DM scheme; 2) the transmission security can also be guaranteed even if the eavesdroppers are located close to or the same as the desired receivers; and 3) the proposed multi-beam WFRFT-DM schemes are capable of independent transmissions for different desired receivers with different modulations.
Cite
@article{arxiv.1908.04633,
title = {WFRFT-aided Power-efficient Multi-beam Directional Modulation Schemes Based on Frequency Diverse Array},
author = {Qian Cheng and Vincent Fusco and Jiang Zhu and Shilian Wang and Fanggang Wang},
journal= {arXiv preprint arXiv:1908.04633},
year = {2019}
}
Comments
accepted by IEEE Transactions on Wireless Communications, 16 pages, 12 figures