Patent Document ID: 5568411
Application ID: 08279545
Patent Flag: 1

Claim One:
1. A processing system for iteratively updating the coefficients of an adaptive filter which uses a polarity-coincidence correlator, in order to remove a distortion inherent in the correlator, the system comprising: storage means for storing a first set of coefficients of an adaptive filter; processing means for determining a second set of coefficients for the adaptive filter, wherein the second set of coefficients is dependent upon the first set of coefficients and is related to the first set by a coefficient update equation which includes a term representing a change in a value of each coefficient in the first set of coefficients, the update equation being a friction of a polarity-coincidence correlator and being modified to remove a distortion term which affects a convergence of the update equation; and control means for storing the second set of adaptive filter coefficients in the storage means.