Oversampled digital signal i.e. split phase-level/phase modulation signal, demodulating method, involves calculating frequency estimation from channel estimation, extracting data, and compensating carrier phase with channel estimation

摘要

The method involves multiplying an oversampled digital signal with a carrier replica whose frequency is an estimation of instantaneous frequency of a carrier of the signal, by a mixer (12). The carrier is extracted from a carrier leak by a non-return-to-zero filter (14) synchronized on optimal sample. A channel is estimated by an averager (SIGMA) downstream of the filter. The instantaneous frequency estimation is calculated from the channel estimation by an estimator (24). Data are extracted by a biphase filter (16), and carrier phase is compensated with the channel estimation. Independent claims are also included for the following: (1) a demodulator for demodulating a signal (2) a computer program comprising a set of instructions for implementing a signal demodulating method.