Patent ID: 8107572

Claim:
A communications system for receiving a modulated signal that carries encoded communications data, comprising: an adaptive filter circuit having a plurality of parallel adaptive filters, wherein each adaptive filter comprises a plurality of non-adaptive and adaptive filter taps with weighted coefficients and an interference reduction circuit that is selected as responsive to one of at least the receive state of a demodulator and the type of modulation used by the communication system; a first power detector, coupled to the input of each of the adaptive filters, for detecting an input power; a second power detector, coupled to the output of each of the adaptive filters, for detecting an output power; an updating unit for updating a gain of the adaptive filter based on the input power and the output power; a selecting unit for selecting the number and order of adaptive filter taps; a separating unit for separating the spacing of multipath introduced by adaptive filter circuit; a first control unit for controlling a normalizing block at an input to each adaptive filter; a second control unit for controlling a normalizing block at output of filter and a switch for bypassing the adaptive filter to an output; a demodulator for demodulating the signal; and a decoder that receives the filtered output signal from the demodulator and decodes the signal to obtain the communications data.