Patent ID: 7711058
Filing Date: 2010-05-04
Classification: H04L

Abstract:
1. A method of determining the time shift and/or power of a received signal incorporating a reference sequence and transmitted by multicarrier modulation on a set of carriers spaced from each other by a distance nΔf where n is a natural integer and Δf is a constant, wherein the method comprises: determining, for each of at least two consecutive values of an integer k, a phase variation value associated with k and representative of the phase variation between two components of the reference sequence of the received signal on two carriers separated by kΔf by differentially demodulating the signal conveyed by one of the two carriers and the signal conveyed by the other of the two carriers, applying an inverse Fourier transform to a series formed by the phase variation values ranked as a function of the associated k in order to obtain the impulse response of the signal, and determining the time shift