Patent ID: 7142616
Filing Date: 2006-11-28
Classification: H04L

Abstract:
1. A front end processor for a data receiver which receives a digital modulation signal that has been amplified in a saturated region during either the process of transmission or of reception, comprising: a quadrature detector which receives data of a modulated digital signal, and converts said data into a complex baseband signal x(n) with quadrature detecting; a complex signal converter for nonlinear distortion equalization which deletes m-th order distortion components of said complex baseband signal x(n), based on a coefficient a a demodulation circuit which outputs a demodulation signal after performing a demodulation process for an output signal of said complex signal converter for the nonlinear distortion equalization, and then outputs a control signal of a phase correction performed in said demodulation process; and an error estimator which calculates an error between said demodulation signal and an ideal reception point; and a coefficient estimator for the nonlinear distortion equalization generates said coefficient a wherein said front end processor for a data receiver updates the value of said coefficient a