Patent ID: 6700936
Filing Date: 2004-03-02
Classification: H04B,H04L

Abstract:
A many-carrier transmission system, comprising a transmitter which includes inverse transform means for generating from an input signal a many-carrier transmission signal having A active carriers out of a possible P carriers, where A is an integer and P is an integer which is the minimum power of 2 which is greater than A, by use of a transform having at least P points, the transmission signal consisting of a sequence of active symbol periods, and a receiver for receiving the many-carrier signal transmitted by the transmitter, the receiver including:means for band-pass filtering and for sampling the received many-carrier signal at a predetermined sample frequency chosen to gather a multiple of P points during one active symbol period, the band-pass filtering and sampling means processing demodulated complex quadrature signals separately; and transform means for receiving the filtered and sampled many-carrier signal and for generating a time-based signal therefrom; in which the transform means at the receiver operates with a Q-point transform, where Q is an integer greater than P.