METHOD AND APPARATUS FOR FILTERED MULTITONE MODULATION USING CIRCULAR CONVOLUTION

摘要

Modulation/demodulation method for multichannel broad band transmission of a signal, represented by a plurality of sequences of data blocks, through a channel (14) from one or more modulators (12) to one or more demodulators (18). The channel (14) comprises K sub-channels (13), each associated both to a predeterminate subsequence of data of the sequence of data, and also to a predeterminate sub-carrier (15) able to modulate the subsequence of data transmitted and to demodulate the subsequence of data received, each subsequence of data being subjected to a modulation filtration at transmission and a demodulation filtration at reception. The modulation filtration comprises a cyclic convolution of each subsequence of data, of the sequence of data, with predeterminate reference transmission signals. The main embodiment concerns Filtereed Multitone Modulation (FMT).