Method and apparatus for minimizing co-channel interference

Details Method and apparatus for minimizing co-channel interference Method and apparatus for minimizing co-channel interference

H - Electricity

04

B

H04B 1/707 (2011.01) H04H 20/51 (2009.01) H04L 27/32 (2006.01)

Patent

CA 2562551

An approach is provided for minimizing co-channel interference in a communication system (100) is disclosed. A header (401) of a first frame is scrambled based on a first unique word (411, 413). A header (401) of a second frame is scrambled based on a second unique word (411, 413). The first frame including the corresponding scrambled header (401) and the second frame including the corresponding scrambled header (401) are transmitted, respectively, over adjacent co-channels of the communication system (100). Each of the frames further includes a payload (403) and a pilot block (405). The payload (403) and the pilot black (405) of the first frame are scrambled based on a first scrambling sequence. The payload (403) and the pilot black (405) of the second frame are scrambled based on a second scrambling sequence. The above arrangement is particularly suited to a digital satellite broadcast and interactive system (100).

L'invention vise à réduire au minimum le brouillage dans la même voie dans un système de communication (100). Un en-tête (401) d'une première trame est brouillé sur la base d'un premier mot unique (411, 413). Un en-tête (401) d'une deuxième trame est brouillée sur la base d'un deuxième mot unique (411, 413). La première trame contenant l'en-tête brouillé (401) correspondant et la deuxième trame contenant l'en-tête brouillé (401) correspondant sont transmis respectivement par des mêmes voies adjacentes du système de communication (100). Chaque trame comprend également une charge utile (403) et un bloc pilote (405). La charge utile (403) et le bloc pilote (405) de la première trame sont brouillés sur la base d'une première séquence de brouillage. La charge utile (403) et le bloc pilote (405) de la deuxième trame sont brouillés sur la base d'une deuxième séquence de brouillage. Le système susmentionné est particulièrement adapté à un système interactif et numérique de diffusion par satellite (100).

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