Comments on "On amplitude and frequency demodulation using energy operators"

Author

Stokes, Virgil P. ; Händel, Peter

Author_Institution

Dept. of Neurosci., Karolinska Inst., Stockholm, Sweden

Volume

46

Issue

2

fYear

1998

Firstpage

506

Lastpage

507

Abstract

The authors comment that while testing some of the results obtained by Maragos, Kaiser and Quatieri (see ibid., vol.41, no.4, p.1532-50, 1993) with a discrete FM signal of the form x(n)=Acos(/spl phi/(n)) where /spl phi/(n)=/spl Omega//sub c/n+/spl Omega//sub m///spl Omega//sub f/sin(/spl Omega//sub f/n)+/spl theta/ they noticed that the error in the instantaneous frequency increased as /spl Omega//sub f/ increased. One would hope that frequency tracking of a constant frequency sinusoidal signal would be very accurate. However, this does not agree with one of their proposition as there is an error in its proof.

Keywords

amplitude modulation; demodulation; frequency modulation; mathematical operators; tracking; amplitude demodulation; constant frequency sinusoidal signal; discrete FM signal; energy operators; error; frequency demodulation; frequency tracking; instantaneous frequency; Band pass filters; Biomedical signal processing; Continuous wavelet transforms; Demodulation; Discrete wavelet transforms; Multiresolution analysis; Signal processing algorithms; Signal resolution; Time frequency analysis; Wavelet analysis;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.655435

Filename

655435