Patent ID: 7804915
Filing Date: 2010-09-28
Classification: H04L

Abstract:
1. A distortion compensation circuit for compensating linear in-band distortion experienced by a modulated signal in a communication path, comprising: an input port for providing the modulated signal; a linear filter disposed to receive the modulated signal from the input port for adaptively modifying a spectrum of the modulated signal, the linear filter having a control port for receiving a set of filter coefficients defining a frequency response of the linear filter; an output port for providing an output signal comprising at least a portion of the modulated signal after the propagation thereof through the communication path and the linear filter; a reference circuit for providing a reference envelope statistical function (ESF) for the modulated signal prior to the propagation thereof through the communication path; and, a filter control circuit coupled between the output port and the control port of the linear filter for adjusting the frequency response thereof in dependence upon the output signal, said filter control circuit comprising: