KALMAN FILTER-BASED ARCHITECTURES FOR INTERFERENCE EXCISION

Authors
  1. Kozminchuk, B.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
Presents a novel Kalman filtering approach to the suppression of narrowband interference from direct sequence spread spectrum communications systems. The algorithm is based on the digital phase-locked loopKalman filter. Because the interference is assumed to be much stronger than either the signal or noise, the Kalman filter locks onto a function related to the interference. The net result is an estimate of thephase of the interference and its amplitude. The algorithm is characterized through computer simulation for the case of narrowband Gaussiannoise interference. Examples of the phase- and envelope-tracking capabilities of the algorithm are presented, followed by bit error rate curves for interference bandwidths ranging from 0.5% to 5.0% of the chiprate of the spread spectrum signal. The report concludes with three adaptive architectures. TRUNCATED
Report Number
DREO-1118 — Technical Report
Date of publication
15 Dec 1991
Number of Pages
37
DSTKIM No
93-00034
CANDIS No
127298
Format(s):
Hardcopy;Originator's fiche received by DSIS

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