AN ITERATIVE TECHNIQUE FOR DESIGNING FINITE IMPULSE RESPONSE CHEBYSHEV MTI FILTERS WITH NONLINEAR PHASE DELAY

Authors
  1. Herring, R.W.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
A technique for designing finite-impulse-response (FIR) equiripple high-pass digital filters with nonlinear phase, suitable for use in radar moving-target-indication (MTI) systems, is described. The optimization of such filters in both the time and frequency domains is discussed, and comparisons are made between the spectral performance of nonlinear-phase filters and that of linear-phase filters designed to meet the same stopband bandwidth and attenuation specifications. In 92 out of the 94 cases examined, the transition bandwidth between the stopband is narrower for the nonlinear-phase filter. In the MTI application, this characteristic makes it possible to detect targets of lower radial velocity. Listings of Fortran programs for designing these nonlinear-phase filters are included.
Report Number
TN-691 —
Date of publication
15 Mar 1978
Number of Pages
57
DSTKIM No
78-02246
CANDIS No
82935
Format(s):
Hardcopy;Originator's fiche received by DSIS

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