Terahertz Time-Domain Spectroscopy Analysis with Wave Atoms Transform
In this paper, a terahertz time-domain spectroscopy analysis method is proposed based on wave atoms transform. As reflection happens when the terahertz goes through the surface of the substance, the traditional Fourier Transform analysis or other transforms analysis like wavelet and curvelet has a limitation on providing clear spectrum characteristics of a wave. Compared with conventional methods, wave atoms transform has sparser expansion for the oscillatory and oriented textures, which is expected to have a better performance when dealing with wave reflection phenomenon. The experimental results demonstrate that the proposed method can enlarge the resolution in the frequency domain; a number of covered significant spectrums are refined. According to the results, the proposed method is most suitable for the spectrums which have one or two distinct wave crests. For the spectrums which are steadily decreasing, the improvement is not significant. Overall, compared with the conventional analysis methods, the proposed method achieves a better spectrum performance.
Qikai Fu LeeMing Cheng Fang Liu
City University of Hong Kong, Hong Kong
国际会议
2011亚太信号与信息处理协会年度峰会(APSIPAASC 2011)
西安
英文
1-6
2011-10-18（万方平台首次上网日期，不代表论文的发表时间）