Data detection for partial response channels
AssigneeDavid Sarnoff Research Center, Inc.
InventorsChristopher Hugh Strolle, Tianmin Liu, Steven Todd Jaffe
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Abstract
A data detector is disclosed which includes a source of a data signal representing a sequence of symbols. A maximum likelihood sequence detector, is coupled to the data signal source, and produces a most likely survivor sequence, which includes a plurality of symbols. A decision feedback equalizer and a phase detector, controlling the timing of the sampling of the data signal, are made responsive to the most likely survivor sequence.
Claims22
A data detector for processing a data signal representing a sequence of symbols, comprising:
- a Viterbi decoder for producing a plurality of survivor sequences including a plurality of symbol decisions and a plurality of error metrics respectively corresponding to the plurality of survivor sequences;
- a multiplexer, connected to said Viterbi decoder, having a plurality of input terminals responsive to the plurality of survivor sequences, and an output terminal producing a most likely survivor sequence, said Viterbi decoder conditioning the multiplexer to produce at its output terminal the survivor sequence having the smallest corresponding error metric as the most likely survivor sequence;
- and
- a decision feedback equalizer, connected to said multiplexer, responsive to the most likely survivor sequence.
A data detector for processing a data signal representing a sequence of symbols, comprising:
- a maximum likelihood sequence decoder for producing a most likely survivor sequence including a plurality of symbol decisions:
- a decision feedback equalizer, connected to said maximum likelihood sequence decoder, responsive to the most likely survivor sequence;
- the maximum likelihood sequence decoder comprises circuitry for varying the size of the most likely survivor sequence in response to a size control signal;
- and
- a monitor and control unit for generating the size control signal.
Dependencies are inferred from the claim text.