Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Patent
1997-06-30
1999-10-12
Ghebretinsae, Temesghen
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
375261, H04L 2706
Patent
active
059664126
ABSTRACT:
Apparatus and method for receiving a QAM signal using a backward compatible hierarchical coding scheme to increase data transmission using finer constellations, while maintaining compatibility with existing Direct Broadcasting Satellite (DBS) systems. The apparatus employs multiple stages of decoders such that the finer constellations of the QAM signal are unraveled at different stages.
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Ghebretinsae Temesghen
Herrmann Eric P.
Kurdyla Ronald H.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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