Decision feedback equalizer and a method of operating a decision feedback equalizer
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United States of America Patent
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Jan 15, 1991
Grant Date -
N/A
app pub date -
Jan 4, 1989
filing date -
Jun 2, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A decision feedback equalizer includes a transversal feedforward digital filter section (16) and a recursive feedback digital filter section (18) including a decision stage (20). In order to optimize the performance of the equalizer, the reference tap position is preferably aligned with a storage location of the feedforward filter section (16) containing the first sample of a current symbol and any contemporaneous samples of preceding symbols, the second and subsequent samples of the current symbol being contained in other storage locations of the feedforward filter section (16). In the case of data being in bursts a better performance may be obtained by time reversing the data applied to the feedforward filter section (16).
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