Satellite broadcasting system

A technology of satellite broadcasting and satellite, which is applied in the field of satellite broadcasting system and can solve problems such as drivers falling asleep

Inactive Publication Date: 2006-12-20
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, depending on how tired the driver is, monotonous mu

Method used

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Effect test

no. 1 approach

[0100] figure 1 is a schematic diagram illustrating the satellite broadcasting system according to the first embodiment of the present invention.

[0101] This satellite broadcasting system consists of terrestrial broadcasting stations (VSAT) BC1 and BC2 or feeder link stations used as transmitters for ground stations, a geostationary satellite SAT used as satellite repeater, and a satellite tracking console STCC.

[0102] Terrestrial broadcast stations (VSAT) BC1 and BC2 or feeder-link stations, each transmitting broadcast stations in the Ka-band (26.5 to 40GHz) or Ku-band (12.5 to 18GHz) via uplink transmission channels to this geostationary satellite SAT Program information produced and edited by (broadcaster).

[0103] The geosynchronous satellite SAT is equipped with a Ka-band or Ku-band antenna with a diameter of 2.5m and a S-band (eg 2.6GHz) antenna with a diameter of 15m. The broadcast signal multiplexed and transmitted by one of these broadcast stations (VSAT) BC1 ...

no. 2 approach

[0112] In the second embodiment of the present invention, the geostationary satellite SAT detects the spread code phase difference between the channels of a CDM broadcast signal from each terrestrial broadcast station BC1 or BC2, and according to the detection result, the spread between the channels The code phases are matched and a signal is then sent to the broadcast receiver MS.

[0113] image 3 is a block diagram illustrating the configuration of the geostationary satellite SAT according to the second embodiment. refer to image 3 , a CDM broadcast signal sent by the terrestrial broadcast station BC1 or BC2 is received by the Ku-band receiving antenna 151 and then input to the receiving circuit 152 . The CDM broadcast signal is amplified with low noise, down-converted to an IF signal, and then distributed to k correlators 161 to 16k. The number of correlators 161 to 16k is set according to the total number k of channels multiplexed / transmitted by the terrestrial broadc...

no. 3 approach

[0120] In the third embodiment of the present invention, when the terrestrial broadcast station BC1 or BC2 generates a CDM broadcast signal and transmits the CDM broadcast signal, it detects the spread code phase difference between channels, and the phase difference information is multiplexed into The CDM broadcast signal is then transmitted. When selectively receiving one of the channels of the CDM broadcast signal arriving through the geostationary satellite SAT, the broadcast receiver MS adjusts the chip phase (chip phase) of the spreading code based on the phase difference information received together with the CDM broadcast signal. phase), and selectively despread the frequency spectrum of the broadcast signal of each channel using the spreading code, thereby reproducing the broadcast signal.

[0121] Figure 4 is a block diagram illustrating the configuration of the transmission section of each of the terrestrial broadcasting stations BC1 and BC2 according to this embod...

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Abstract

A satellite broadcasting system is provided. 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).

Description

[0001] This application is a divisional application of the application dated July 3, 1998, application number 200410028285.6, and invention name "Satellite Broadcasting System". technical field [0002] The present invention relates to a kind of satellite broadcasting system, and this system utilizes broadcasting satellite or communication satellite on geosynchronous orbit to broadcast information such as video, audio frequency and data etc. CDM: Code Division Multiplexing) A system that multiplexes and broadcasts multiple channels. Background technique [0003] In recent years, with the increase of communication demands and the advancement of communication technology, various communication systems have been continuously developed. One of the communication systems is a satellite broadcasting system using a broadcasting satellite or a communication satellite in a geosynchronous orbit. This satellite broadcasting system has an advantage that it can provide information broadca...

Claims

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Application Information

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IPC IPC(8): H04J13/00H04B7/15H04H1/00
Inventor 末永雅士冈优小石洋一藤森之美菊池英男
Owner KK TOSHIBA
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