The paper focuses on blind separation of the single-channel mixed signal which is an important and touchy issue in uncooperative communications. An algorithm based on bit-interleaved code modulation iterative decoder (BICM-ID) scheme is proposed in the paper which joints demapping and decoding and can recover multi-path source signals from a single-channel mixed signal. The new algorithm for demapping of mixed signals is provided based on theoretical analysis and mathematical derivation. Theoretical analysis and simulation results show that the local algorithm can directly recover all the source signals from a single-channel mixed signal without separating the mixed signals. The advantages of the algorithm are low computational complexity, lower BER for both non-ISI, ISI AWGN channels, and suitable for the situations of equivalent as well as non-equivalent power mixed signals.
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