A Robust Doppler Imaging Method Using Log-step Multicarrier Ultrasonic Signals

被引：0

作者：

Maeda, Yasushige ^{[1
]}

Sugimoto, Masanori ^{[2
]}

Hashizume, Hiromichi ^{[3
]}

机构：

[1] Grad Univ Adv Studies, Dept Informat, Sch Multidisciplinary Sci, Chiyoda Ku, 2-1-2 Hitotsubashi, Tokyo, Japan

[2] Hokkaido Univ, Dept Comp Sci, Kita Ku, Sapporo, Hokkaido, Japan

[3] Natl Inst Informat Informat Syst, Architecture Sci Res Div, Chiyoda Ku, Tokyo, Japan

来源：

2013 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS) | 2013年

关键词：

D O I：

10.1109/ULTSYM.2013.0338

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Recently, the authors described a new algorithm for ultrasonic Doppler imaging and velocity estimation using log-step multicarrier signals. The algorithm achieved a velocity estimation precision that was some 20 times better than that using an existing method, but the problem of estimation deficiency in low-SNR conditions remained. In this work, we improve the availability of the algorithm in low-SNR conditions by utilizing the systematic temporal shift of the log-step multicarrier signals, which expresses approximately the amount of Doppler shift in the sensed signal. A computer simulation shows high availability for the algorithm, even for SNR values below -10 dB.

引用

页码：1315 / 1318

页数：4

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