A fast frequency domain algorithm for decoding quadrature Doppler signals

Author

Aydin, Nizamettin ; Evans, David H.

Author_Institution

Fac. of Eng., Gebze Inst. of Adv. Technol., Turkey

Volume

3

fYear

1996

fDate

31 Oct-3 Nov 1996

Firstpage

993

Abstract

A fast frequency domain method for quadrature-to-directional format conversion of Doppler ultrasound signals is described. The algorithm requires only one complex FFT and one inverse FFT. Since the technique relies on the manipulation of phase information in the frequency domain after the complex FFT, it is named the Spectral Translocation Method (STM). The theoretical description is verified by simulation and practical implementations. The algorithm has been implemented in real-time using a commercially available digital signal processor board. Results show that more than 50 dB channel separation is achievable and widespread use of DSP chips makes this method attractive

Keywords

Doppler measurement; acoustic signal processing; biomedical ultrasonics; decoding; fast Fourier transforms; frequency-domain analysis; medical signal processing; 50 dB; Doppler ultrasound signals; commercially available digital signal processor board; complex FFT; fast frequency domain algorithm; inverse FFT; phase information manipulation; quadrature Doppler signals decoding; real-time implementation; spectral translocation method; Audio tapes; Biomedical engineering; Decoding; Digital signal processors; Fourier transforms; Frequency domain analysis; Physics; Signal processing; Signal processing algorithms; Ultrasonic imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE

Conference_Location

Amsterdam

Print_ISBN

0-7803-3811-1

Type

conf

DOI

10.1109/IEMBS.1996.652676

Filename

652676