Satellite payload processing system using polyphase demultiplexing, quadrature phase shift keying demodulation and rate alignment
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United States of America Patent
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Apr 1, 2003
Issued Date -
N/A
app pub date -
Mar 9, 1999
filing date -
Nov 5, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A satellite payload processing system for processing an uplink signal consisting of a plurality of single-channel-per-carrier, frequency division multiple access carriers comprises a polyphase demultiplexer processor for separating the uplink signal into a time division multiplexed data stream of symbols. The polyphase demultiplexer processor presents the symbols corresponding to each of a plurality of carriers at respective ones of the frequencies in the uplink signal sequentially to an output of the polyphase demultiplexer processor. A phase shift keying demodulator and differential decoder demodulates the stream of symbols into corresponding time division multiplexed stream of digital baseband bits, which are then rate-aligned with respect to an on-board clock.
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