Equalizers for layered modulated and other signals
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Abstract
A method and apparatus for equalizing digital data signals is disclosed. The method comprises the steps of demodulating and decoding an input signal having input data to produce a data output, remodulating the data output to produce a training sequence including an idealized input signal, wherein the training sequence is comprised of adjacent symbols in the input data, and generating equalizer parameters from the training sequence. The apparatus comprises a demodulator (for demodulating an input signal to produce a data output), a modulator communicatively coupled to the demodulator (for remodulating the data output to produce a training sequence including an idealized input signal wherein the training sequence is comprised of adjacent symbols in the input data), and a parameter generation module communicatively coupled to the modulator (for generating equalizer parameters from the training sequence).
105 Citations
24 Claims
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1-21. -21. (canceled)
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22. A blanket equalizer for equalizing digital data signals, comprising:
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a transversal filter for receiving a reconstructed symbol sequence from another equalizer and for filtering the reconstructed symbol sequence; and
an adder for summing an input signal and the filtered reconstructed symbol sequence output from the transversal filter to create an estimated symbol sequence. - View Dependent Claims (23, 24)
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Specification