A Demodulation Algorithm for Time-Phase Modulation Based on Non-Stationary Signal Analyzing

Abstract

In this paper,the property of time-frequency distribution for time-phase modulation(TPM) signal was analyzed based on non-stationary signal analyzing method.The mapping model between phase mutation and amplitude of time-frequency distribution for TPM signal was proposed,and by using this model,a demodulation algorithm for TPM based on non-stationary signal analyzing was presented.Furthermore,the performance of the demodulation algorithm was analyzed and the problem about the choice of optimum decision limens was discussed.The validity of the theoretical analysis was proved by simulation result.The results of theory and simulation showed that the demodulation algorithm provided by this paper not only could offer good error performance for TPM system,but also could bring a new valuable method for communication signal processing based on non-stationary theory.