A Hybrid Carrier Communication System Based on Weighted Affine Fourier Transform

Inspired by classical hybrid carrier (HC) systems for enhanced signal flexibility and compatibility, we propose a novel unitary transform called weighted affine fourier transform (WAFT) to construct a HC system. The proposed system combines Single-Carrier (SC) and Chirp Multi-Carrier (CMC) modulation, allowing for the adjustment of the composition ratio between SC and CMC system through weighted parameters in WAFT. Consequently, this system has the capability to fine-tune parameters for better alignment with channel transmission, increase the proportion of the single-carrier component to reduce Peak-to-Average Power Ratio (PAPR), and employ multiple parameters for encryption, thereby enhancing transmission security. The simulation demonstrates the Bit Error Rate (BER), PAPR, and security of the proposed system, showcasing its advantages over the conventional systems mentioned above.