Adaptive channel equalizer
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United States of America Patent
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-
Dec 3, 2002
Grant Date -
N/A
app pub date -
May 5, 2000
filing date -
Jul 14, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a receiver for processing a VSB modulated signal containing terrestrial broadcast high definition television information including data packets, the received signal is converted to a digital signal (19), demodulated (22) and equalized by an adaptive channel equalizer (34). An equalized signal is processed by decoding networks including a Reed-Solomon FEC error detecting and correcting network (44). The equalizer filter coefficient step size is dynamically adjusted during the adaption process as a function of the packet error rate. A local microcontroller (60) monitors the packet error rate at the Reed-Solomon error detector and instructs the equalizer to adjust the coefficient step size in a direction to reduce the packet error rate.
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