Adaptive equalizing apparatus and method

Details Adaptive equalizing apparatus and method Adaptive equalizing apparatus and method

2005-03-21

2009-06-23

Torres, Juan A (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S230000, C375S233000

Reexamination Certificate

active

07551668

ABSTRACT:
An adaptive equalizing apparatus that can positively remove the leading Inter Symbol Interference (ISI), make a maximum-likelihood decoding and an optimum equalization on the basis of the result of the maximum-likelihood decoding with consideration being given to the asymmetry of an input waveform. The adaptive equalizing apparatus includes a feedforward filter, a maximum-likelihood decoder, a feedback filter, a delay unit, and a subtracter. In the feedback filter, the tap factor is controlled on the basis of the binary signal generated by the maximum-likelihood decoding to generate a distortion of a partial response after the leading edge of the binary signal and an ISI response after the trailing edge. In the feedforward filter, the tap factor for the signal supplied from the subtracter is controlled to be a partial response.

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