| 基于频率方差加权的时延差估计方法 |
| |
| 引用本文： | 郑恩明,陈新华,孙长瑜.基于频率方差加权的时延差估计方法[J].系统工程与电子技术,2014,36(2):224-229. |
| |
| 作者姓名： | 郑恩明 陈新华 孙长瑜 |
| |
| 作者单位： | 1. 中国科学院声学研究所， 北京 100190；
2. 中国科学院大学， 北京 100190 |
| |
| 摘 要： | 针对目标辐射信号未知时的时延差估计问题，提出一种基于频率方差加权的时延差估计方法。所提方法利用非真值时延差对应频率单元随机、真值时延差对应频率单元稳定的特点，对所有时延差进行频率方差加权统计，突出目标辐射信号频率单元的时延差估计结果。理论分析和仿真结果表明，相比常规互相关法，所提方法具有较好的鲁棒性，为弱信号时延差估计提供了一个参考思路。
|
Time delay difference estimation weighted method based on frequency variance |
| |
| ZHENG En-ming,CHEN Xin-hua,SUN Chang-yu.Time delay difference estimation weighted method based on frequency variance[J].System Engineering and Electronics,2014,36(2):224-229. |
| |
| Authors: | ZHENG En-ming CHEN Xin-hua SUN Chang-yu |
| |
| Institution: | 1. Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; ;
2. University of Chinese Academy of Sciences, Beijing 100190, China |
| |
| Abstract: | For the problem of time delay difference (TDD) estimation of unknown signal, a weighted method based on frequency variance is proposed for TDD estimation. The proposed method uses the characteristics of frequency units of false TDD being random and frequency units of true TDD being steady to weight each TDD based on frequency variance, and extrudes the true TDD. The theoretical analysis and experiment results show that the proposed method has better robustness than the conventional cross correlation, and provides a reference idea for TDD estimation of weak signal. |
| |
| Keywords: | |
|
| 点击此处可从《系统工程与电子技术》浏览原始摘要信息 |
| 点击此处可从《系统工程与电子技术》下载免费的PDF全文 |
