Low Complexity Algorithm on Blind Separation of Paired Carrier Multiple Access Signals Based on Single Way Timing Accuracy

The traditional algorithm of the Per-Survivor Processing (PSP) model is analyzed, and the improved algorithm of nonbinary Soft-Output Viterbi Algorithm and PSP (SOVA-PSP) with soft output for feedforward are given. For the condition of the single way timing accurate, the SOVA-PSP algorithm on blind separation of Paired Carrier Multiple Access (PCMA) signals is presented. Relative to the traditional PSP algorithm, the state of the proposed algorithm is reduced from M2(L-1) to M(L-1) (M is the order of the modulator, L is the length of equivalent channel response), so as to greatly reduce the algorithm complexity. Simulation results demonstrate that, compared with the traditional algorithm of PSP, the improved algorithm can reduce the complexity with almost no performance loss.