One-Symbol Differential Trellis Detector for Multi-h CPM Signal

Multi-h continuous-phase modulation (CPM) has been used in telecommunication and aeronautical telemetry system due to its high power and spectral efficiency. Nonetheless, the optimum MLSE receiver suffers from high implementation complexity. One-symbol differential trellis detector with Viterbi algorithm for multi-h CPM signal is proposed in this article, we derives a simple trellis to reduce the number of trellis states efficiently. Compared to MLSE, the number of trellis states is reduced from 512 to 16 given the partial response length L=3. Simulation results show that the one-symbol differential trellis detector we proposed outperforms the multi-symbol noncoherent detector.