%0 Journal Article
%T Time-frequency Methods for Period Identification of Loran-C<br>罗兰C周期识别时频分析方法研究
%A Zhu Yin-bing
%A Xu Jiang-ning
%A Cui Guo-heng
%A Ma Jian-guo
%A <br>朱银兵
%A 许江宁
%A 崔国恒
%A 马建国
%J 电子与信息学报
%D 2010
%I 
%X Based on the analysis of Short Time Fourier Transform(STFT) and Wigner-Vill Transform(WVT) for Loran-C signal, influence of SNR at the antenna input, SGR(Sky-wave to Ground-wave Ratio) and phase difference on STFT and WVT for Loran-C signal are analyzed and simulated. The results show that peak values of STFT and WVT for Loran-C signal are steady, and noise can be restrained successfully. But they both have the issue of multi-values, moreover, the issue of multi-values of Loran-C signal’s WVT can be removed successfully and effectively because frequency points of its negative peak values are different when the arrival time interval of sky-wave and ground-wave is different, so a new period identification based on WVT for Loran-C is presented.
%K Loran C
%K Period identification
%K Time-frequency analysis
%K Wigner-Vill Transform(WVT)
%K Short Time Fourier Transform(STFT)<br>罗兰C
%K 周期识别
%K 时频分析
%K Wigner-Vill变换
%K 短时傅里叶变换
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=ABCA911DA5F15A4674F999252AD2BA83&yid=140ECF96957D60B2&vid=9971A5E270697F23&iid=38B194292C032A66&sid=20D29EF591CB2C94&eid=FA98B938D085B826&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=1&reference_num=11