期刊名称：International Journal of Computer and Information Technology
印刷版ISSN：2279-0764
出版年度：2016
卷号：5
期号：1
页码：78
出版社：International Journal of Computer and Information Technology
摘要：This paper presents an ultrasonic signal detection approach using sequential equivalent time sampling (SETS) based on compressed sensing (CS). SETS has been incorporated in digital acquisition system to capture a repetitive waveform with a single analog to digital converter (ADC) clocked at a rate that is much lower than the signal's Nyquist rate. The proposed approach considers recovering repetitive ultrasonic signal with high time resolution from samples taken by SETS. The CS measurement matrix is constructed in the context of SETS technique. A basis function is constructed to realize the ultrasonic signal sparse representation, which paves the way for applying CS theory to ultrasonic signal sub-Nyquist rate sampling. Experimental results indicate that, the proposed sampling model is feasible, and the ultrasonic signal could be reconstructed from a small number of SETS samples. Compared to the traditional SETS time-alignment signal reconstruction, the number used to signal reconstruction could be significantly reduced.
关键词：equivalent time sampling; ultrasonic signal detection; ; compressed sensing; orthogonal matching pursuit
