Construction of a multicarrier signal

Details Construction of a multicarrier signal Construction of a multicarrier signal

H - Electricity

04

J

H04J 11/00 (2006.01) H04L 5/06 (2006.01) H04L 27/00 (2006.01) H04L 27/26 (2006.01) H04L 27/34 (2006.01)

Patent

CA 2220107

The invention concerns a multicarrier signal designed to be transmitted to digital receivers, especially in a non-stationary transmission channel, corresponding to the frequency multiplexing of several elementary carriers each corresponding to a series of symbols, two consecutive symbols being separated by a symbol time .tau.0, a signal in which, firstly, the spacing v0 between two neighboring carriers is equal to half of the reverse of the symbol time .tau.0 and, secondly, each carrier undergoes an operation of filtering for the shaping of its spectrum having a bandwidth strictly greater than twice said spacing between carriers vo and is spectrum is chosen so that each symbol element is highly concentrated in the temporal domain and in the frequency domain. The invention also concerns the methods for the transmission and reception of such a signal.

L'invention concerne un signal multiporteuse destiné à être transmis vers des récepteurs numériques, notamment dans un canal de transmission non-stationnaire, correspondant au multiplexage en fréquence de plusieurs porteuses élémentaires correspondant chacunes à une série de symboles, deux symboles consécutifs étant séparés d'un temps symbole tau 0, signal dans lequel, d'une part, l'espacement nu 0 entre deux porteuses voisines est égal à la moitié de l'inverse du temps symbole tau 0, et dans lequel, d'autre part, chaque porteuse subit un filtrage de mise en forme de son spectre présentant une largeur de bande strictement supérieure à deux fois ledit espacement entre porteuses nu 0, et choisi de façon que chaque symbole soit fortement concentré dans le domaine temporel et dans le domaine fréquentiel. L'invention concerne également les procédés d'émission et de réception d'un tel signal.

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