Group delay based magnitude square coherence estimation13; by an ARMA model

Narasimhan, SV and Reddy, GR and Plotkin, EI and Swamy, MNS (1995) Group delay based magnitude square coherence estimation13; by an ARMA model. Signal Processing, 46 (3). pp. 285-296. ISSN 0165- 1684

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Abstract

In this paper, a new method of estimation of the magnitude square coherence function (MSC) by an ARMA model is13; proposed. The estimation is achieved by modeling the periodogram estimate of the MSC and the ARMA model has been13; realized by the pole-zero decomposition property of the group delay function (GDF). Its performance has been found to be superior to that of the periodogram MSC estimate in terms of normalized sum of the sample mean square error13; (NSSMSE) and maximum sample root mean square error (RMSE). Further, its performance is comparable with those of13; the existing ARMA based estimation methods and requires less computations. The proposed ARMA-MSC estimation is13; simple and does not involve any explicit solution of a system of equations.

Item Type:	Journal Article
Additional Information:	copyright 1995 Elsevier Science all right reserved
Uncontrolled Keywords:	Coherence function;Rational modeling;ARMA;Group delay function
Subjects:	ENGINEERING > Electronics and Electrical Engineering
Division/Department:	Aerospace Electronics and Controls Division, Other, Other, Other
Depositing User:	Ms Indrani V
Date Deposited:	04 May 2005
Last Modified:	30 Apr 2012 11:23
URI:	http://nal-ir.nal.res.in/id/eprint/758

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