Secure Communication Using Scramble Phase Assisting WFRFT

Yuan LIANG  Xinyu DA  Ruiyang XU  Lei NI  Dong ZHAI  Yu PAN  

IEICE TRANSACTIONS on Communications   Vol.E102-B   No.4   pp.779-789
Publication Date: 2019/04/01
Publicized: 2018/10/03
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2018EBP3148
Type of Manuscript: PAPER
Category: Fundamental Theories for Communications
physical layer (PHY) security,  weighted-type fractional Fourier transform (WFRFT),  dynamic scramble phase,  constellation beguiling,  anti-intercepting,  

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In this paper, a scramble phase assisting weighted-type fractional Fourier transform (SPA-WFRFT) based system is proposed to guarantee the communication's security. The original transmitting signal is divided into two parts. The first part is modulated by WFRFT and subsequently makes up the constellation beguiling. The other part is used to generate the scramble phase and also to assist in the encryption of the WFRFT modulated signal dynamically. The novel constellation optimal model is built and solved through the genetic algorithm (GA) for the constellation beguiling. And the double pseudo scheme is implemented for the scramble phase generation. Theoretical analyses show that excellent security performances and high spectral efficiency can be attained. Final simulations are carried out to evaluate the performances of the SPA-WFRFT based system, and demonstrate that the proposed system can effectively degrade the unauthorized receivers' bit error rate (BER) performance while maintaining its own communication quality.