Patent Document ID: 6047025
Application ID: 09023061
Patent Flag: 1

Claim One:
1. An equalizer for removing errors in a complex signal which is subject to symmetric phase and amplitude distortion, comprising: a first complex multiplier having a first input for receiving the complex signal, a second input for receiving a complex coefficient, and an output for providing a corrected signal; a signal estimator having an input for receiving the complex signal, and an output for providing an estimated signal; an error estimator having an input for receiving said corrected signal, and an output for providing an error signal; a coefficient predictor comprising: a second multiplier having a first input for receiving a complex conjugate of said estimated signal, a second input for receiving said error signal, and an output; said output of said second multiplier having a real component equal to a selected one of: (a) a product of a real component of said complex conjugate of said estimated signal and a real component of said error signal, or (b) a product of an imaginary component of said complex conjugate of said estimated signal and an imaginary component of said error signal; said output of said second multiplier having an imaginary component equal to a selected one of: (c) a product of a real component of said complex conjugate of said estimated signal and an imaginary component of said error signal, or (d) a product of an imaginary component of said complex conjugate of said estimated signal and a real component of said error signal; a third scalar multiplier having an input coupled to said output of said second multiplier, and an output, said third scalar multiplier multiplying said input thereof by a predetermined scalar to provide said output thereof; and a summing device having a first input coupled to said output of said third scalar multiplier, a second input for receiving a prior coefficient, and an output for providing a new coefficient as a sum thereof.