Patent ID: 7260160

Claim:
A method of decoding a phase modulated carrier signal comprising the steps of: (A) receiving said phase modulated carrier signal; (B) performing a frequency loop lock (FLL) tracking of said received phase modulated signal having a carrier frequency; (C) locking on to said carrier frequency of said received phase modulated signal by using said FLL; (D1) computing inphase and quadrature correlation data corresponding to said phase modulated carrier signal at a plurality of time epochs; (D2) computing a first partial probability of a current data bit at a current time epoch by using said computed in said step (D1) inphase and quadrature correlation data corresponding to at least two consecutive time epochs, each said consecutive time epoch preceding said current time epoch; (D3) repeating said step (D2) for a plurality of time epochs preceding said current time epoch to obtain a plurality of partial probabilities of said current data bit; (D4) computing said total probability of said current data bit by using said computed in said step (D3) plurality of partial probabilities of said current data bit; and (E) outputting said current data bit as being “one” or “zero” at said time epoch based on said computed in said step (D4) total probability.