NDLI: Insertion of diagonal loading into the multistage Wiener filter

Content Provider	IEEE Xplore Digital Library
Author	Hiemstra, J.D. Weippert, M.E. Nguyen, H.N. Goldstein, J.S.
Copyright Year	2002
Description	Author affiliation: SAIC, Chantilly, VA, USA (Hiemstra, J.D.; Weippert, M.E.; Nguyen, H.N.; Goldstein, J.S.)
Abstract	Diagonal loading is a well-known technique for adding robustness to beamformer solutions. Diagonal loading will add robustness to steering vector direction-of-arrival mismatch; element position, gain, and/or phase perturbations; "statistical" mismatch due to finite sample support; etc. In a traditional sample matrix inversion implementation of the minimum variance distortionless response beamformer diagonal loading can be inserted by adding a scaled version of the identity matrix to the sample covariance matrix. Other adaptive beamformers (e.g. LMS) have their own approaches for adding diagonal loading. In this paper we describe how diagonal loading can be added to the multistage Wiener filter (MWF). Previous published results have developed one form of loading for the MWF called "error loading". In this paper we introduce two new forms of loading and show that each of these is equivalent to diagonal loading, whereas, error loading is distinct.
Sponsorship	IEEE Signal Process. Soc
Starting Page	379
Ending Page	382
File Size	279358
Page Count	4
File Format	PDF
ISBN	0780375513
DOI	10.1109/SAM.2002.1191065
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-08-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wiener filter Covariance matrix Equations Robustness Least squares approximation Array signal processing Bismuth
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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