H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 5/00 (2006.01) H04B 14/08 (2006.01) H04L 27/00 (2006.01) H04L 27/26 (2006.01)
Patent
CA 2265779
Digital communication equipment which is increased in communication capacity and data transmission quantity and improved in such radio communication performances as the fading resistance, interference resistance, etc. Multi- carrier modulation and spread spectrum are coupled with each other so as to obtain their merits by performing the multi-carrier modulation by means of a DMT modulating section (90) and, thereafter, diffusion modulation by means of a diffusion modulating section (14). In addition, the performance of the communication equipment is further improved by using discrete orthogonal wavelet inversion by means of an M-band wavelet inverting section (29) for the multi-carrier modulation.
L'invention concerne un équipement de communication numérique dont on a augmenté la capacité de communication ainsi que la quantité de données de transmission, et dont on a amélioré la qualité de fonctionnement de radiocommunication telle que la résistance à l'évanouissement, la résistance aux interférences, etc. On a associé la modulation à porteuses multiples et le spectre étalé afin d'obtenir leurs avantages en procédant à une modulation à porteuses multiples au moyen d'une partie de démodulation (90) DMT, et, ensuite, à une modulation de diffusion à l'aide d'une partie (14) de modulation de diffusion. De plus, on a amélioré davantage la qualité de fonctionnement de l'équipement de communication en utilisant une inversion d'ondelette orthogonale discrète au moyen d'une partie (29) d'inversion d'ondelette à bande M pour la modulation à porteuses multiples.
Kirby Eades Gale Baker
Mitsubishi Denki Kabushiki Kaisha
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