US 2003/0210741 A1 · Channel estimator for an adaptive equalizer

Abstract

An impulse response of a channel is estimated by cross-correlating a known training signal with a received training signal to produce a cross-correlation vector. The cross-correlation vector is characterized by a known noise component resulting from the finiteness of the correlation. A correction vector is estimated based on the known training signal, where the correction vector is related to the noise component. Truncated representations of the correction vector are iteratively subtracted from the cross-correlation vector in order to produce a succession of cross-correlation outputs of increased accuracy. When the cross-correlation output is sufficiently accurate, it may be used to determine the weights to be given to the taps of an equalizer.

Claims37

Dependent claims

A method for estimating the impulse response of a channel comprising:

a-periodically cross-correlating a known training signal with a received training signal to produce a cross-correlation vector, the cross-correlation vector being characterized by a noise component resulting from the finiteness of the correlation;
estimating a correction vector based on the known training signal, the correction vector being related to the noise component;
and,
iteratively subtracting truncated representations of the correction vector from the cross-correlation vector to produce a succession of cross-correlation outputs of increased accuracy.

1 more element

Dependencies are inferred from the claim text.

Channel estimator for an adaptive equalizer

Life of this patent

Channel estimator for an adaptive equalizer

Life of this patent

Abstract

Claims37