CPM-PSWFs Signal Demodulation Based on Multi-Symbol Detection

Abstract

Continuous phase modulation (CPM) based on Prolate Spheroidal Wave Functions (PSWFs) signal (CPM-PSWFs) is a novel continuous phase digital modulation method, this method uses the 0 order prolate spheroidal wave function signal as continuous phase modulated baseband Frequency Modulation (FM) pulse signal, which has excellent basic characteristics such as the best time-frequency energy accumulation, flexible and controllable time bandwidth product, etc. The CPM-PSWFs signal is obtained by carrier phase modulation. First, the CPM-PSWFs signal is described, secondly, using the Multi-Symbol Detection (MSD) method, taking the CPM-PSWFs full response signal as an example, the demodulation performance of the CPM-PSWFs signal and the Minimum Shift Keying (MSK) signal are compared and analyzed. The simulation results show that under the given parameter conditions, when the Bit Error Rate (BER) is 10-4, the CPM-PSWFs signal based on multi-symbol detection can obtain about 2dB demodulation gain compared with the MSK signal.