Implementation of the CPFSK Signal Non-coherent Multi-symbol Detection Algorithm with Reduced Complexity

The traditional non-coherent Multi-Symbol Detection (MSD) method for Continuous Phase Frequency Shift Keying (CPFSK) signals suffers from the problems of a large number of associated operations and high complexity. In this paper, we propose a non-coherent multi-symbol detection algorithm with reduced complexity. The improved algorithm selects only the local reference signal whose first symbol is the same as the already detected symbol for the correlation operation, which reduces the correlation operation by nearly 50% compared with the traditional algorithm and reduces the complexity of the algorithm. A graphical system modeling and simulation of the non-coherent multi-symbol detection algorithm with reduced complexity are performed in the DSP Builder platform. The model is simulated by using ModelSim software for engineering validation, and the simulation result shows that the model can implement the improved algorithm for CPFSK signal detection.