Satellite broadcasting system

H - Electricity – 04 – B

Patent

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Details

H04B 7/185 (2006.01) B60R 99/00 (2009.01) G08B 21/00 (2006.01) H01Q 1/18 (2006.01) H01Q 15/24 (2006.01) H01Q 21/24 (2006.01) H04B 1/06 (2006.01) H04B 7/19 (2006.01) H04B 7/216 (2006.01)

Patent

CA 2260227

In a broadcasting receiver, to quickly switch channels of the received multiplexed broadcasting signals at a high response speed to improve the convenience for a viewer, when broadcasting signals of a plurality of channels are to be code-division-multiplexed and broadcasted from a ground broadcasting station (BC1, BC2) to a broadcasting receiver (MS) in a service area via a geostationary satellite (SAT), the broadcasting signals are multiplexed and transmitted after matching the spreading code phase between the channels in the ground broadcasting station (BC1, BC2). Alternatively, the spreading code phase difference between the channels of a CDM broadcasting signal arriving from the ground broadcasting station (BC1, BC2) is detected in the geostationary satellite (SAT), and the broadcasting signal is transmitted to the broadcasting receiver (MS) after matching the spreading code phase between the channels on the basis of the detection result.

Cette invention se rapporte à la sélection de canaux au niveau d'un récepteur de radiodiffusion conçu pour recevoir des signaux de radiodiffusion multiplexés, sélection qu'il est possible d'effectuer aisément et rapidement, avec un bon temps de réponse, ce qui accroît la commodité de sélection par l'utilisateur. Au niveau de stations terrestres de radiodiffusion (BC1, BC2), les codes d'étalement du spectre associés aux canaux sont mis en phase, puis les signaux de radiodiffusion des canaux sont multiplexés par répartition de code (MRC) et les signaux de radiodiffusion sont émis par un satellite géostationnaire (SAT) à destination de récepteurs de radiodiffusion (MS) dans la zone desservie. Une autre solution consiste à déterminer les différences entre les codes d'étalement de spectre associés aux canaux des signaux de radiodiffusion en MRC émis à partir des stations terrestres de radiodiffusion (BC1, BC2), à mettre en phase les codes d'étalement du spectre en fonction de ces différences, et à émettre les signaux de radiodiffusion à destination des receveurs (MS).

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