SYSTEM FOR BROADCASTING DIGITAL INFORMATION FROM A PLURALITY OF GROUND STATIONS VIA COMMUNICATION SATELLITE

摘要

PROBLEM TO BE SOLVED: To eliminate the need for mounting a Reed Solomon decoding process by creating a scramble function (EDS) mounted on a communication satellite while keeping Reed Solomon coding in a ground broadcast station. SOLUTION: The system includes at least one set of links that send digital information of a packet format with at least two different frequencies to a communication satellite, at least a 2nd set of links that is mounted on the communication satellite to receiver a packet of the digital information, at least one packet time multiplexing module 10 that is connected to both inputs of a digital information format module including a scrambler 13 connecting to part of inputs of a broadcast DVB-S chain in which start from an output of the 2nd set of the links and a convolution interleave block and end in the QPSK modulator, and at least one clock 11 that is mounted on the communication satellite, operated asynchronously with all ground clocks and drives assemblies mounted on the communication satellite.