Please use this identifier to cite or link to this item:
Title: Improving performance of pulse compression in a Doppler ultrasound system using amplitude modulated chirps and Wiener filtering.
Authors: Cowe, J
Gittins, J
Evans, DH
First Published: Feb-2008
Citation: ULTRASOUND MED BIOL, 2008, 34 (2), pp. 326-333
Abstract: The use of coded excitation and pulse compression in transcranial Doppler (TCD) ultrasound systems is in the very early stages; the optimal processing scheme has yet to be determined. This study uses linear frequency-modulated (FM) chirps with 0.8-MHz bandwidth and compares the use of pulses with and without amplitude modulation and also matched filtering vs. Wiener filtering. The results demonstrate that using amplitude-modulated pulses vastly improves the axial resolution and provides a more predictable mainlobe-to-sidelobe distance in the radiofrequency (RF) signal. It is also shown that a Wiener filter can provide better performance than a matched filter, in terms of axial resolution and sidelobe level in the RF signal and signal-to-noise ratio in conventional sonograms. Although this study uses a TCD system, the techniques described are equally as applicable in other Doppler ultrasound devices.
DOI Link: 10.1016/j.ultrasmedbio.2007.08.001
ISSN: 0301-5629
Type: Journal Article
Appears in Collections:Published Articles, Dept. of Cardiovascular Sciences

Files in This Item:
There are no files associated with this item.

Items in LRA are protected by copyright, with all rights reserved, unless otherwise indicated.