Dual-mode equalizer in an ATSC-DTV receiver
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United States of America Patent
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Mar 15, 2011
Grant Date -
Nov 27, 2008
app pub date -
May 11, 2005
filing date -
May 12, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A decision feedback equalizer for processing a data signal provides concurrent equalizer outputs (Z.sub.ok, Z.sub.1k) for hard decision directed and soft decision directed modes. The joint architecture in accordance with the present invention takes advantage of the fact, herein recognized, that for each equalizer output symbol soft decision bit representation, a subset of these bits corresponds to the hard decision representation. As a result, the invention permits the concurrent output of two distinct modes with essentially the same hardware as a one output equalizer.
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