| 一种基于MUSIC算法的天地波识别方法 |
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| 引用本文： | 曾辉艳,华宇,李实锋.一种基于MUSIC算法的天地波识别方法[J].时间频率学报,2011,34(1). |
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| 作者姓名： | 曾辉艳 华宇 李实锋 |
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| 作者单位： | 1. 中国科学院国家授时中心，西安 710600;中国科学院精密导航定位与定时技术重点实验室，西安 710600;中国科学院研究生院，北京 100039
2. 中国科学院国家授时中心，西安 710600;中国科学院精密导航定位与定时技术重点实验室，西安 710600 |
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| 基金项目： | 国家自然科学基金资助项目(09152KB01); 中国科学院知识创新工程重要方向资助项目(0808YC3301) |
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| 摘 要： | 基于我国BPL长波脉冲信号的特征,利用MUSIC(多信号分类)算法对BPL天、地波延迟进行估计,实现天、地波识别。对传统谱估计IFFT(快速傅里叶逆变换)算法和现代谱估计MUSIC算法进行了仿真和比较,结果表明,这两种方法在较低信噪比条件下可有效分离天、地波,且识别误差都能控制在±5μs内,但MUSIC算法比IFFT算法具有更高的精度和分辨率。
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| 关 键 词： | BPL长波信号 天地波识别 MUSIC算法 |
A method based on MUSIC algorithm for distinguishing between sky-wave and ground-wave |
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| ZENG Hui-yan,HUA Yu,LI Shi-feng.A method based on MUSIC algorithm for distinguishing between sky-wave and ground-wave[J].Journal of Time and Frequency,2011,34(1). |
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| Authors: | ZENG Hui-yan HUA Yu LI Shi-feng |
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| Institution: | ZENG Hui-yan1,2,3,HUA Yu1,LI Shi-feng1,2(1.National Time Service Center,Chinese Academy of Sciences,Xi'an 710600,China,2.Key Laboratory of Precision Navigation and Timing Technology,National Time Service Center,3.Graduate University of Chinese Academy of Sciences,Beijing 100039,China) |
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| Abstract: | In view of the characteristic of BPL long-wave impulse signals,the MUSIC(multiple signal classification) algorithm is used to estimate the time delays of sky-wave and ground-wave and distinguish between them.The simulations are made with the IFFT algorithm,a traditional spectral estimation technique,and the MUSIC algorithm,a modern spectral estimation technique,respectively.The comparisons show that both IFFT algorithm and MUSIC algorithm can be used for distinguishing the sky-wave and ground-wave from each... |
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| Keywords: | BPL Long-wave signal distinguishing between sky-wave and ground-wave MUSIC algorithm |
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