Time-frequency analysis of a complicated Doppler signal with two figure eight kernels

Author

Noguchi, Yamaki ; Matsumoto, Fujihiko ; Kashiwagi, Eiichi ; Watanabe, K. ; Sugimoto, Suguru

Author_Institution

Dept. of Appl. Phys., Nat. Defense Acad., Yokosuka, Japan

Volume

1

fYear

2002

fDate

2002

Firstpage

82

Abstract

A Cohen´s class time-frequency analysis has high resolution on the TF plane both in time and in frequency. A complicated (nonstationary and/or nonlinear) Doppler signal was obtained from synthesized data. In order to analyze this signal, two kinds of figure eight kernels were used:(1) a figure eight kernel, and (2) a 2nd figure eight kernel. As well known conventional kernels, we used a Wigner kernel, and a Choi-Williams kernel. Using our figure eight kernels, the original signal was demodulated with high resolution. Furthermore, a 2nd figure eight kernel improved the demodulation accuracy.

Keywords

Doppler measurement; biomedical ultrasonics; medical signal processing; time-frequency analysis; 2nd figure eight kernel; Choi-Williams kernel; Cohen´s class time-frequency analysis; Wigner kernel; complicated Doppler signal; demodulated signal; demodulation accuracy; medical diagnostic technique; nonlinear Doppler signal; signal analysis; Computer science; Design methodology; Doppler shift; Harmonic analysis; Iron; Kernel; Physics; Signal analysis; Signal resolution; Time frequency analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology, 2002. 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society EMBS/BMES Conference, 2002. Proceedings of the Second Joint

ISSN

1094-687X

Print_ISBN

0-7803-7612-9

Type

conf

DOI

10.1109/IEMBS.2002.1134398

Filename

1134398