Patent ID: 7027500

Claim:
Apparatus for applying equalization to a complex-valued received signal, the received signal being single-axis (SA) modulated data, the apparatus comprising: a linear predictive (LPR) filter characterized by a set of real-valued LPR parameters applied to the received signal, wherein the set of LPR parameters are recursively updated based on one or more error terms to minimize output power of the LPR-filtered signal; an equalizer configurable as either a linear equalizer (LE) or a decision feedback equalizer (DFE) and applying an estimate of the inverse channel characteristics to the received signal to generate an equalized signal, wherein: i) the equalizer comprises a forward (FW) filter characterized by a set of FW parameters, a feedback (FB) filter characterized by a set of real-valued FB parameters, and a decision circuit generating hard decisions for the data of the equalized signal, and ii) the set of real-valued FB parameters are initialized by the set of real-valued LPR parameters, the set of FW parameters are initialized with either values of a predetermined impulse response or values based on a function of a channel response, and the set of FW parameters and the set of FB parameters are recursively updated based on one or more error terms; and an error term calculator configured to generate the one or more error terms from one or more blind cost criteria based on real-part extraction.