SPREAD SPECTRUM METHOD WITH ELIMINATION OF SUB-BANDS

摘要

The invention relates to a spread spectrum method for a digital input signal (x(n)), said method comprising the following steps: coefficients of a reversible digital periodical linear filter (1) are selected in such a way that the spectrum of the input signal (x(n)) is spread in order to occupy a spread frequency band (B) with the exception of at least one eliminated frequency sub-band (B'), included in the spread frequency band, and the input signal is processed by means of the digital periodical linear filter in such a way as to obtain a spread spectrum output signal (y(n)).