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http://dx.doi.org/10.5370/KIEE.2012.61.8.1193

Instantaneous Amplitude and Frequency Estimator Using the Symmetric Higher Order Differential Energy Operator  

Iem, Byeong-Gwan (강릉대학교 전자공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.61, no.8, 2012 , pp. 1193-1198 More about this Journal
Abstract
An instantaneous amplitude (IA) estimator using the symmetric higher order differential energy operator is proposed. The amplitude estimator and the instantaneous frequency (IF) estimator based on the symmetric higher order differential energy operator coincide with the analyzed signal in time, and they show better estimation results than the IA and IF based on the higher order differential energy operator. Various IF and IA estimators are applied to AM-FM signals for the performance comparison. Among the IF and IA estimators, the IF and IA estimators based on the symmetric higher order energy operator show the best estimation accuracy. Then, the IA and IF estimators are applied to the distorted power line signal to show their usefulness as power disturbance detectors.
Keywords
AM-FM signal; Higher order differential energy operator; Instantaneous amplitude; Frequency; Instantaneous frequency; Symmetric energy operator;
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