Patent ID: 6850557
Filing Date: 2005-02-01
Classification: G01S,H04B,H04L

Abstract:
1. A system comprising: a receiver configured to receive a first segment of a signal and a second segment of the signal, the first and second segments acquired during separate periods of time, the first and second segments having non-uniform lengths, the signal comprising a signal of interest perturbed by noise or pseudo-noise; a correlator coupled to the receiver, the correlator configured to derive first correlation data representative of a first correlation between the first segment and a hypothesis, the correlator configured to impose a carrier offset upon the second segment so that a carrier phase of the second segment corresponds to that of the first segment, the correlator configured to derive second correlation data representative of a second correlation between the phase shifted second segment and the hypothesis; and a combiner coupled to the correlator, the combiner configured to coherently combine the first and second correlation data to obtain cumulative correlation data useful for detecting the signal of interest or a parameter of the signal of interest.