Performance of time delay estimation methods for small time shifts ultrasonic signals

被引:22
作者
deKorte, CL [1 ]
vanderSteen, AFW [1 ]
Dijkman, BHJ [1 ]
机构
[1] INTERUNIV CARDIOL CTR NETHERLANDS,AMSTERDAM,NETHERLANDS
关键词
elastography; measurement; simulations; time delay estimation; ultrasound;
D O I
10.1016/S0041-624X(97)00016-4
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
In this study several time delay estimation (TDE) methods were investigated for estimation of time shifts of less than 10 ns at a frequency of 30 MHz. Using simulated and experimental echosignals we investigated the performance of five methods: two phase related methods (phase shift and phase difference method); two correlation methods (cross-correlation and correlation interpolation method) and a demodulation method. The results showed that the correlation interpolation method is by far the most accurate for all time delays. With this method, estimation errors of about 200 ps are achievable with an signal-to-noise ratio (SNR) of 40 dB (f(0) = 30 MHz, bandwidth = 20 MHz) for time shifts of up to 10 ns. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:263 / 274
页数:12
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