Patent ID: 7688918
Filing Date: 2010-03-30
Classification: H04L

Abstract:
1. A receiver for a phase-shift-keying (PSK) signal, comprising: a detector adapted to mix said PSK signal with a local oscillator (LO) signal to produce a digital measure of the PSK signal; and a digital processor being coupled to receive the digital measure from the detector and being adapted to process the digital measure to recover data encoded in the PSK signal by measuring time-varying phase offset between a carrier frequency of the PSK signal and the LO signal, wherein: for each time slot of the PSK signal, the digital processor is adapted to estimate the phase of a respective PSK constellation symbol based on (i) an angular component of the digital measure and (ii) an angular component of a recursive function, said recursive function having a first component calculated based on the digital measure for the current time slot and a second component calculated based on the digital measure for a preceding time slot and weighted by a recursive memory factor.