Aiming at the blind separation problem of two MPSK mixed signals received in a single channel, this paper proposes a new blind separation algorithm based on oversampling. Based on the optimal Bayesian estimation criterion, the algorithm uses particle filtering to sequentially estimate the transmitted symbols and some parameters, thereby achieving the separation of mixed signals. By oversampling the received signal, the algorithm utilizes more received waveform information and effectively suppresses the influence of noise. Simulation experiments show that the new algorithm has good bit error rate performance. This paper also analyzes the performance of the separation algorithm from the perspective of maximum likelihood and gives the bit error rate performance bound of the algorithm.
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