AN IMPROVED KALMAN FILTER EXCISOR FOR SUPPRESSING NARROWBAND GAUSSIAN NOISE INTERFERENCE

Authors
  1. Kozminchuk, B.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
Presents an improved Kalman filter excisor for dealing with narrowband Gaussian noise. For this type of interference, both envelope and phase vary with time. Since the Kalman filter approach is close to optimum for interferers with constant or very slowly varying envelopes, performance for the narrowband Gaussian noise case will be significantly less than optimum. Ways and means of improving the performance by up to 5 dB are presented. These include the use of an alternate filtering approach to estimate the envelope to counter group delay effects, and phase-smoothing to suppress some of additional noise caused by temporary loss of lock by the Kalman filter during those instants when the envelope changes sign.
Report Number
DREO-TN-92-28 — Technical Note
Date of publication
01 Nov 1992
Number of Pages
36
DSTKIM No
93-02737
CANDIS No
129004
Format(s):
Hardcopy;Originator's fiche received by DSIS

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