MPWFRFT Secure Communication Scheme Based on Chaotic CP Insertion

Security is one of the key issues in the development of wireless communication systems, and wireless communication is highly susceptible to security threats, such as eavesdropping and interference due to its openness and broadcast nature. Traditional security is achieved by cryptography above the physical layer, which lacks effective security measures. In this paper, we propose a dynamic cyclic prefix (CP) insertion scheme by using one-dimensional chaotic mapping and multiple-parameter weighted fractional Fourier transform (MPWFRFT) communication method, chaotic mapping is used to control the length of the inserted CP, as CP length changes at each block, and eavesdroppers can not fully get information about the chaotic mapping, physical layer security can be achieved. Simulation analysis shows that the proposed method can maintain good BER performance, and the generated signal has a low interception property.