1. A method for processing, in an ultra-wide band receiver, a rectified received signal sampled at a frequency f E , including at least one sliding correlation between a selection of the sampled rectified received signal and a correlation sequence, the correlation sequence including at least one elementary correlation sequence of duration T S equal to the duration of a sequence S of a transmitted signal which corresponds to the received signal and data which follow each other at a frequency f C such that f C =f E /k, k being an integer larger than or equal to 1, an elementary correlation sequence datum corresponding on a one-to-one basis to a datum of a transmission code used for forming the sequence S and having a spreading duration comprised between 1/f E and 1/f c , the sliding correlation carrying out a succession of n elementary correlation steps, n being an integer larger than or equal to 2, at a frequency f less than or equal to f E and greater than or equal to f c , the method comprising, for each selection of the received signal: an elementary correlation carrying out a correlation operation between the relevant selection of the sampled rectified ultra-wide band received signal and the correlation sequence to provide a series of intermediate correlation samples; and summation of the intermediate correlation samples provided to obtain a single elementary correlation sample; and the n elementary correlation samples obtained forming a first correlation vector.