System and method for using circular constellations with...

H - Electricity – 04 – L

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H04L 5/12 (2006.01) H04L 25/03 (2006.01) H04L 25/06 (2006.01) H04L 27/34 (2006.01)

Patent

CA 2283411

A system (Fig. 3) and method for communicating information using circular multidimensional signal space constellations (Fig. 1b) using uncoded modulation allows increased data rate and bandwidth by eliminating trellis encoding, thus reducing the number of computational cycles required for coding. Furthermore, the use of circular signal space constellations (Fig. 1b) lowers the transmit peak factor, thus consuming less power. Using uncoded modulations with circular constellations allows an approximate 10-20 % performance improvement for a given central processor unit. Additionally, circular constellations (Fig. 1b) allow the easy and reliable transmission of special marker symbols such as "End of File", "Start of Message", "End of Transmission" or "Increase or Decrease Data Rate".

Un système et un procédé permettant de communiquer des informations à l'aide de constellations spatiales circulaires de signaux mutidimensionnels par modulation non codée permettent d'augmenter le débit binaire et la largeur de bande puisqu'on élimine le codage treillis, ceci réduisant le nombre de cycles de calculs nécessaires au codage. En outre l'utilisation de constellation spatiales circulaires de signaux réduit le facteur de crête de transmission et par conséquent la puissance consommée est moindre. Le fait d'utiliser la modulation non codée avec des constellations circulaires permet d'augmenter les performances d'environ 10 à 20 % pour une unité centrale de traitement donnée. De plus ces constellations circulaires permettent de transmettre avec facilité et fiabilité des symboles de marquage spéciaux tels que "fin de fichier", "début du message", "fin de la transmission" ou "augmenter ou réduire le débit binaire".

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