Patent ID: 6138261
Filing Date: 2000-10-24
Classification: H03M

Abstract:
A method for custom coding uplink signals at a ground station and downlink beams at a satellite, the method comprising the following steps:applying, at an originating ground station, an outer code to a first uplink signal to produce an outer coded uplink signal;applying a reduced complexity inner code to said outer coded uplink signal to produce a concatenated coded uplink signal;transmitting said concatenated coded uplink signal to a satellite;decoding, at said satellite, said reduced complexity inner code on said concatenated coded uplink signal to produce an outer coded satellite data stream;applying at least one selected inner code, at said satellite, to said outer coded satellite data stream, without decoding said outer code at said satellite, to produce a concatenated coded satellite data stream; andtransmitting said concatenated coded satellite data stream in a downlink beam to a destination ground station, wherein said first uplink signal remains encoded with said outer code from transmission to the satellite until received by the destination ground station.