Apparatus and method for reducing message collision between...

Details Apparatus and method for reducing message collision between... Apparatus and method for reducing message collision between...

H - Electricity

04

L

H04L 12/28 (2006.01) H04B 7/26 (2006.01) H04B 1/707 (2006.01) H04Q 7/22 (2006.01) H04Q 7/38 (2006.01) H04J 13/00 (2006.01)

Patent

CA 2130667

Collisions between messages simultaneously transmitted by multiple, spread spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station uses one or more randomization methods to distribute its transmissions. Each mobile station includes a microprocessor (100); an encoder (140); a timing generator (136); a PN long code sequence generator (146); and XOR gate (152). The system is used in a CDMA mobile telephone system.

On réduit les collisions entre messages transmis simultanément par des émetteurs à étalement du spectre multiple en répartissant les transmissions sur les ressources disponibles du récepteur. Chaque station mobile utilise un ou plusieurs procédés de mise en forme aléatoire pour répartir ses transmissions. Chaque station mobile comprend un microprocesseur (100), un codeur (140), un générateur de synchronisation (136), un générateur (146) de séquences de codes longs de pseudo-bruit (PN), ainsi qu'une porte OU exclusif (152). On utilise ce système dans un système téléphonique mobile AMDC.

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