A Fast Demodulation Algorithm for Co-Frequency Mixed Signals Based on Pre-decision

Extracting component signals for co-frequency mixed signals with the same or similar modulation parameters remains a significant challenge. A pre-decision method is proposed to address this issue by utilizing the signal enhancement phenomenon of two MPSK aliasing signals, and a single-channel blind source separation (SCBSS) algorithm based on the pre-decision is put forward. The simulation results demonstrate that, compared with the competing algorithms, the proposed algorithm can significantly reduce the complexity and ensure the demodulation performance.