Constant modular complete blind detection equalizing method for phase modulation signal

TL;DR: In this paper, a phase modulation signal constant modulus full-blind detection equalization method is proposed to solve the phase ambiguity in the signal which is equalized by the receiver end through the CMA.

Abstract: Disclosed is a phase modulation signal constant modulus full-blind detection equalization method which is a solution in the MPSK (multiple phase shift keying) modulation system that the receiver end adopts the CMA (constant modulus algorithm) to process the full-blind equalization; the full-blind detection equalization method mainly solves the problem that in the MPSK modulation system, the phase ambiguity exists in the signal which is equalized by the receiver end through the CMA; in the full-blind environment, the CMA is adopted to trace and detect the modulation mode of the MPSK The full-blind detection equalization method extracts the difference phase information of the common constant modulus output signal and uses the trigonometric function relation to process self-adopting towards the detection phase modulation mode; meanwhile, the detected phase modulation mode is substituted in the improved constant modulus equalizer so that the common phase deviation problem in the blind equalization algorithm is further eliminated; with the aim of eliminating the error periodically caused by the trigonometric function, the full-blind detection equalization method adds restrictive conditions to the trigonometric function so that the uniqueness of the detection of the phase modulation mode is guaranteed