Method and apparatus for ghost cancelling and/or equalizing

摘要

PCT No. PCT/EP93/00311 Sec. 371 Date Dec. 19, 1994 Sec. 102(e) Date Dec. 19, 1994 PCT Filed Feb. 9, 1993 PCT Pub. No. WO93/16527 PCT Pub. Date Aug. 19, 1993A method for signal equalization/ghost cancellation with an equalizing filter includes synthesizing a first equalizing filter function (LMS 1) with N (an integer) taps and associated coefficients. The respective coefficients are adjusted to minimize the error between a received reference signal output by the synthesized equalizing filter function and a non-distorted reference signal. The adjusted coefficients are evaluated to determine P (an integer) groups of M (an integer) taps and associated coefficients which contribute to said synthesized equalizing filter function according to a predetermined criterion and wherein P times M is less than N. A second equalizing filter function is synthesized corresponding to the first equalizing filter function with coefficients other than the P groups of M coefficients set to zero, and the P groups to M coefficients are adjusted to minimize the error. The adjusted P groups of M coefficients are applied to a programmable filter to configure the programmable filter to execute an equalizing filter function on received signal.