کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1760103 | 1019330 | 2006 | 7 صفحه PDF | دانلود رایگان |
A scheme of using phase-coded excitation and mismatched filter compression for high-frequency ultrasound imaging is presented in this paper. Biphase-coded pulses were constructed to excite the transducer. Received signals were compressed with mismatched filters optimized by minimizing peak-sidelobe-level (PSL). Both simulation and experiments were carried out to demonstrate the advantage of this technique. The simulation results demonstrated a possible sidelobe reduction (<−90 dB) with a slightly decrease of the signal-to-noise ratio of less than 1 dB compared with the compression using matched filters alone. The experimental results showed about 14 dB SNR improvement as well as −40 dB sidelobe level when the Barker-13 code excitation with 3-cycle sinusoidal wave carrier was used.
Journal: Ultrasonics - Volume 44, Issue 3, July 2006, Pages 330–336