Decision feedback filter device in the frequency domain
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United States of America Patent
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Apr 18, 2000
Grant Date -
N/A
app pub date -
Jul 13, 1998
filing date -
Sep 8, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A decision feedback filter device which has a forward filter (FF) and a feedback filter (FB) for the production, from input symbols (x(n)), of the corresponding decisions (d(n)), the forward filter (FF) receiving the input symbols at input, and the feedback filter (FB) receiving the decisions (d(n)) at input. The forward filter (FF) carries out a frequency domain filtering of blocks of M input symbols, and the feedback filter (FB) carries out a frequency domain filtering of blocks of L decisions, with L being lower than M. The feedback filter permits the intersymbol interference caused by the reception of echoes to be rectified.
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