| 基于STFT的宽带信号时差测量方法 |
| |
| 引用本文： | 牛犇,任文娟,胡东辉,丁赤飚. 基于STFT的宽带信号时差测量方法[J]. 国外电子测量技术, 2011, 30(10): 17-21,33 |
| |
| 作者姓名： | 牛犇 任文娟 胡东辉 丁赤飚 |
| |
| 作者单位： | 1. 中国科学院电子学研究所北京100190;中国科学院空间信息处理与应用系统技术重点实验室 北京 10019C; 中国科学院研究生院 北京 100190
2. 中国科学院电子学研究所北京100190;中国科学院空间信息处理与应用系统技术重点实验室 北京 10019C |
| |
| 摘 要： | 利用相位干涉仪测量信号到达时差时,频率估计误差会引起测量误差,且现有方法对宽带信号适应性较差.针对这些问题,提出了利用信号频域互相关的相频曲线估计到达时差的方法.该方法利用短时傅里叶变换对宽带信号进行重构,并对重构信号在频域进行互相关,然后利用相频曲线的线性关系估计时差.该方法在低信噪比条件下对宽带信号的到达时差具有较...
|
| 关 键 词： | 短时傅里叶变换 相位干涉仪 信号重构 相频曲线 时差 |
A method to estimate TDOA based on STFT for wideband signal |
| |
| Niu Ben,Ren Wenjuan,Hu Donghu,Ding Chibiao. A method to estimate TDOA based on STFT for wideband signal[J]. Foreign Electronic Measurement Technology, 2011, 30(10): 17-21,33 |
| |
| Authors: | Niu Ben Ren Wenjuan Hu Donghu Ding Chibiao |
| |
| Affiliation: | Niu Ben1,2,3 Ren Wenjuan1,3 Hu Donghui1,2 Ding Chibiao1,2 (1.Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China,2.Key Laboratory of Technology in Geo-spatial Information Processing and Application System,Institute of Electronics,3.Graduate University of the Chinese Academy of Sciences,China) |
| |
| Abstract: | In measuring time difference of arrival (TDOA) with phase interferometer,the precision of TDOA measurement is influenced by the error induced in frequency estimation,and the adaptability of existed methods for wideband signal is bad.Aim at these problems,a method to estimate TDOA using the phase-frequency curve acquired by correlation in frequency domain is proposed in this paper.The method firstly reconstructs the wideband signal using short Fourier transform (STFT),and then obtains phase-frequency curve b... |
| |
| Keywords: | short time fourier transforms (STFT) phase interferometer signal reconstruction phase-frequency curve time difference of arrival (TDOA) |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
