Detector for demodulating a received signal and producing an information data signal with reduced intersymbol interference
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United States of America Patent
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Aug 13, 1996
Grant Date -
N/A
app pub date -
May 1, 1995
filing date -
May 1, 1995
priority date (Note) -
Expired
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Abstract
This detector is for demodulating a received signal having been previously encoded by a trellis coded modulator and for producing an information data signal with reduced intersymbol interference. The detector comprises a predictor, a delay line, a feedforward filter, an adder, a subtracter, an updater and a trellis coded modulation estimator. The trellis coded modulation estimator has a feedback filter which is adjusted with respect to the feedforward filter to form a decision-feedback equalizer. Moreover, the delay line has a predetermined length which is adjusted according to an order of the feedforward filter and a depth of the trellis coded modulation estimator to achieve a zero relative delay between an output of the feedforward filter and outputs of the trellis coded modulation estimator.
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