Pulse shaping for multicarrier modulation

H - Electricity – 04 – L

Patent

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Details

H04L 27/18 (2006.01) H04L 23/00 (2006.01) H04L 27/26 (2006.01)

Patent

CA 2226723

A method and system for data transmission in an orthogonal frequency division multiplexed (OFDM) system is provided. In the invention each of a plurality of data symbols C k, having a symbol period T, are modulated (404) onto one of a plurality of subcarriers comprising a first data signal. The first data signal is then multiplied (406) by a pulse-shaping function over the period T to generate a second data signal. The second data signal is then modulated (412) and transmit-ted on a system carrier over a communications channel (414) of the OFDM system.

La présente invention concerne un procédé et un système de transmission de données dans un système multiplexé à répartition orthogonale des fréquences (MROF). Selon l'invention, chaque symbole de données Ck parmi plusieurs, ayant une période de symbole T, module (404) une sous-porteuse parmi plusieurs qui comprennent un premier signal de données, qui est alors multiplié (406) par une fonction de mise en forme d'impulsions, pendant la période T, pour produire un deuxième signal de données. Le deuxième signal de données est ensuite modulé (412) et transmis sur une porteuse du système en passant par un canal de communications (414) du système MROF.

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