Security-Enhanced Directional Modulation Based on Two-Dimensional M-WFRFT  

作　　者：Zhou Zhuang Luo Junshan Wang Shilian Xia Guojiang 

机构地区：[1]School of Electronic Science,National University of Defense Technology,Changsha 410073,China [2]Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China

出　　处：《China Communications》2024年第5期229-248,共20页中国通信（英文版）

基　　金：supported by National Natural Science Foundation of China(No.62171445)。

摘　　要：Directional modulation(DM)is one of the most promising secure communication techniques.However,when the eavesdropper is co-located with the legitimate receiver,the conventional DM has the disadvantages of weak anti-scanning capability,anti-deciphering capability,and low secrecy rate.In response to these problems,we propose a twodimensional multi-term weighted fractional Fourier transform aided DM scheme,in which the legitimate receiver and the transmitter use different transform terms and transform orders to encrypt and decrypt the confidential information.In order to further lower the probability of being deciphered by an eavesdropper,we use the subblock partition method to convert the one-dimensional modulated signal vector into a twodimensional signal matrix,increasing the confusion of the useful information.Numerical results demonstrate that the proposed DM scheme not only provides stronger anti-deciphering and anti-scanning capabilities but also improves the secrecy rate performance of the system.

关 键 词：bit error rate directional modulation phased array secrecy rate weighted fractional Fourier transform 

分 类 号：TN915.08[电子电信—通信与信息系统]