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Loran-C信号中直达波与反射波的提取方法研究

A Study on the Extraction Method of Direct Wave and Reflected Wave in Loran-C Signal

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【作者】 黄显良戚浩郁建芳谢石文王琐琛杨波夏仕安

【Author】 HUANG Xian-liang;QI Hao;YU Jian-fang;XIE Shi-wen;WANG Suo-chen;YANG Bo;XIA Shi-an;Earthquake Administration of Anhui Province;Dabieshan Earthquake Experiment Field;

【机构】 安徽省地震局大别山地震监测预报实验场

【摘要】 Loran-C信号中直达波和反射波到时差的提取是利用其进行测距的关键所在。通过分析Loran-C信号实测波形与理论波形的特征,认为两者所包含的直达波信号一致。基于此特征,通过波形相减的方法从实测Loran-C信号中剔除理论直达波信号,并结合互相关方法求解出直达波和反射波的到时差。

【Abstract】 Determining the difference in arrival time between direct waves and reflected waves in the Loran-C signal is crucial for effectively using it for ranging.Based on the analysis of waveform characteristics of the measured waves and theoretical waves in Loran-C signal,it is considered that the direct wave signal included in the measured Loran-C signal is consistent with that in the theoretical signal.Therefore,the theoretical direct wave signal can be removed from the measured Loran-C signal via waveform subtraction,then the difference in arrival time between direct waves and reflected waves can be calculated by using cross-correlation method.

【关键词】 Loran-C信号到时差互相关
【Key words】 Loran-C signalarrival time differencecross-correlation
【基金】 地震科技星火计划(XH15021);安徽省自然科学基金面上项目(1708085MD93);中央引导地方专项资金科技惠民项目(2016080802D117)
  • 【文献出处】 地震工程学报 ,China Earthquake Engineering Journal , 编辑部邮箱 ,2017年04期
  • 【分类号】P315.73
  • 【被引频次】1
  • 【下载频次】51
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