Double-Layer Generalized Multi-Parameter Weighted Fractional Fourier Transform Secure Communication Method with Hénon-Sine Chaos

In order to improve the security of physical layer information transmission, a double-layer generalized multi-parameter weighted fractional Fourier transform(MP-WFRFT) secure communication method based on Hénon-Sine chaotic encryption is proposed in this paper. Firstly, in view of the traditional MP-WFRFT single-layer structure is easy to be eavesdropped by exhaustive scanning, a double-layer generalized multi-parameter weighted fractional Fourier transform (DL-GMP-WFRFT) with more abundant types is constructed by making full use of the type diversity of the generalized weighted fractional Fourier transform(GWFRFT), which improves the parameter anti-scanning performance of MP-WFRFT. Then, Hénon-Sine chaotic sequence was used to encrypt the amplitude and phase of the constellation, and DL-GMP-WFRFT was used to encrypt the constellation to further conceal the modulated signal style. Computer simulation results show that the constellation map after encryption by the proposed method presents a Gaussian-like distribution, with a large key space and good key sensitivity.