Arbitrarily high sampling rate adaptive filters
Abstract
A realization of adaptive filters for which there is no theoretical limit on sampling rate in a given speed of hardware, at the expense of additional hardware and latency is demonstrated. The realization does not change the inputoutput characteristics aside from finite precision effects, and hence does not degrade the filter tracking capability. The basis for the realization is the adaptive lattice filter, which uses only local feedback in adapting reflection coefficients at each stage, and for which the recursive portion of the adaptation algorithms in each stage is linear. The realization is based on these two properties and the basic technique of lookahead computation. Several forms of the realization applying to different recursive leastsquares and stochasticgradient adaptation algorithms are described.
 Publication:

IEEE Transactions on Acoustics Speech and Signal Processing
 Pub Date:
 April 1987
 Bibcode:
 1987ITASS..35..455M
 Keywords:

 Adaptive Filters;
 Data Sampling;
 Lattices (Mathematics);
 Vectors (Mathematics);
 Feedback Control;
 Least Squares Method;
 Recursive Functions;
 Tracking Filters;
 Electronics and Electrical Engineering