Frequency reuse technique for a high data rate satellite communication system

摘要: 14 FREQUENCY REUSE TECHNIQUE FOR A HIGH DATA RATE SATELLITE COMMUNICATION SYSTEM ABSTRACT Frequency reuse (70) and data coding methods (80, 90) for use in a high rate satellite communication system (10). The frequency method provides dual polarization spatial of transmit receive beams to provide twelve-fold increase the effective bandwidth number users that may be supported by Transmit antennas multiple, inter- leaved antenna beams. Digital input at source user terminal is coded transmitted from on one plurality demodulated. received demodulated routed so it destination terminal. then remodulat- ed, multiplexed, decoded produce output data. processed digital, (concatenated forward error correction processing) employed reduce sensitivity communicated interference. presently preferred encoding comprises Reed-Solomon (42) data, interleaving (43) encoded convolutionally (44) interleaved time division multiplexing (45) modulating (46) preferreddecoding demodulating (56) demu ltiplexing (57) multiplexed Viterbi decoding (58) demultiplexed deinterleaving (59) (60) deinterleaved Other schemes alternatively employed. steps regenerates quality digital stream effects uplink interference upon downlink stream.