Detector for demodulating a received signal and producing an inf

Details Detector for demodulating a received signal and producing an inf Detector for demodulating a received signal and producing an inf

1995-05-01

1996-08-13

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375340, 375233, 375234, 375348, H04L 2706

Patent

active

055464300

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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