Abstract: The invention relates to a method of determining the time shift and/or the power of a received signal incorporating a reference sequence (3) and transmitted by multicarrier modulation on a set (M) of carriers spaced from each other by a distance n?f where n is a natural integer and ?f is a constant. An inverse Fourier transform is applied to the phase variations between components of the signal carried by carriers separated by k?f for consecutive values of k in order to obtain the impulse response (RI) of the signal and the time shift ?0 and/or the power of the received signal is/are determined from the impulse response by observation of the highest level amplitude peak.

Abstract: The invention relates to a method of determining the time shift and/or the power of a received signal incorporating a reference sequence (3) and transmitted by multicarrier modulation on a set (M) of carriers spaced from each other by a distance n?f where n is a natural integer and ?f is a constant. An inverse Fourier transform is applied to the phase variations between components of the signal carried by carriers separated by k?f for consecutive values of k in order to obtain the impulse response (RI) of the signal and the time shift ?0 and/or the power of the received signal is/are determined from the impulse response by observation of the highest level amplitude peak.

Abstract: To interleave or deinterleave data elements in first and second blocks transmitted alternately and each having N data elements with rank n lying between 0 and N−1, N being an integer, the data elements with ranks 0, . . . n, . . . N−1 in the first blocks are ordered in accordance with the successive ranks A(0), . . . A(n), . . . A(N−1) and the data elements with ranks 0, . . . n, . . . N−1 in the second block are ordered in accordance with the successive ranks A−1(0), . . . A−1(n), . . . A−1(N−1). A and A−1 are different functions such that A−1(A(n))=n.