Title :
Bi-directional Doppler time-frequency representation based on a complex wavelet transform
Author :
Zhang, Yufeng ; Guo, Zhenyu ; Wang, Weilian
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., George Washington Univ., Washington, DC, USA
Abstract :
A complex continuous wavelet transform (CCWT) was introduced to derive the bi-directional Doppler time-frequency representation (TFR) from in-phase and quadrature Doppler signals. The mathematical theory of this method was presented. This method was applied in simulated and practical in-phase and quadrature Doppler signals of the femoral artery, together with the processing results. The CCWT is a straightforward technique for deriving bi-directional Doppler TFR
Keywords :
Doppler measurement; acoustic signal processing; biomedical ultrasonics; blood flow measurement; blood vessels; medical signal processing; time-frequency analysis; wavelet transforms; CCWT; Doppler blood flow signals; bi-directional Doppler time-frequency representation; complex continuous wavelet transform; femoral artery; in-phase signals; mathematical theory; quadrature Doppler signals; Arteries; Bidirectional control; Blood flow; Continuous wavelet transforms; Equations; Signal analysis; Signal processing; Time frequency analysis; Transducers; Wavelet transforms;
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.804099
