Packet data transmission with clash subtraction

H - Electricity – 04 – L

Patent

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Details

H04L 12/56 (2006.01) H04L 1/16 (2006.01) H04L 25/03 (2006.01)

Patent

CA 2250520

A system for transmitting digital data messages between a plurality of stations using a common communications channel is disclosed. The data messages are assembled into data packets which include address and control information. The data packets are then transmitted from the stations over the common channel using appropriate data representative waveforms or modulation. A composite waveform representative of the data packets including potentially time overlapping data packets are received and processed to decode at least one packet. The waveform representative of the at least one decoded packet is reconstructed and subtracted form the received composite waveform to obtain a residual waveform. The residual waveform is then further processed to attempt to decode at least one further packet.

Cette invention se rapporte à un système de transmission de messages constitués de données numériques, entre une pluralité de stations, au moyen d'une voie de communications commune. Les messages de données sont assemblés en paquets de données comportant des informations de commande et d'adresse. Ces paquets de données sont ensuite émis à partir des stations sur une voie commune au moyen d'une modulation ou d'ondes appropriées représentatives des données. Une onde composite représentative des paquets de données, y compris de paquets de données à recouvrement possible dans le temps, est reçue et traitée en vue du décodage d'au moins un paquet. L'onde représentative de ce paquet décodé est reconstruite et soustraite de l'onde composite reçue pour produire une onde résiduelle. Puis cette onde résiduelle subit un traitement visant à décoder, si possible, au moins un autre paquet.

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