Adaptive noise suppression for digital modems
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United States of America Patent
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Dec 30, 1986
Grant Date -
N/A
app pub date -
Mar 8, 1985
filing date -
Mar 8, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention provides a receiver for a QAM modem with a phase tracking loop for eliminating phase errors due to phase jitter and frequency offset. The instantaneous phase error of the received signal is monitored and if it is below a certain preselected value, indicating the presence of white noise, the gain of the phase tracking loop is reduced.
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