Patent attributes
An apparatus and method are provided for equalizing a dispersive channel based on in-phase and quadrature samples corresponding to an input signal. An equalizer according to the present invention uses a novel adaptation algorithm to adjust filtering characteristics based on previous in-phase samples and a current quadrature sample. The adaptation algorithm is configured to update filter coefficients in response to detecting a transition in the in-phase samples. The equalizer provides equalization for quadrature post-cursor intersymbol interference (ISI) components of the input signal. In an embodiment, the equalizer also provides equalization for in-phase post-cursor ISI components, quadrature precursor ISI components, in-phase precursor ISI components, or a combination of the forgoing.
