基于自适应相干模板的BPL窄带干扰抑制方法  

A method based on adaptive coherent model to suppress narrow band interference of BPL signal

作　　者：高媛媛[1,2,3] 华宇 赵弦[1,2] 袁江斌 GAO Yuan-yuan;HUA Yu;ZHAO Xian;YUAN Jiang-bin(National Time Service Center,Chinese Academy of Sciences,Xi＇an 710600,China;Key Laborate of Precise Positioning and Timing Technology,Chinese Academy of Sciences,Xi＇an;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院精密导航定位与定时技术重点实验室,西安710600 [3]中国科学院大学,北京100049

出　　处：《时间频率学报》2018年第3期251-257,共7页Journal of Time and Frequency

基　　金：国防创新基金资助项目(CXJJ-16Q209)

摘　　要：针对BPL授时系统中的窄带干扰问题,特别是强的窄带干扰能够淹没BPL授时信号,严重影响BPL定时接收机后续的信号处理,将自适应相干模板法用于抑制BPL信号的窄带干扰。该方法结合BPL长波授时系统的发播信号特点,通过对采样数据的累加及求平均来获取干扰信号模板,再将其与原信号做移位减法操作,以达到消除窄带干扰的目的。通过对该算法的理论分析与实验仿真,验证了该算法的可行性,其抗窄带干扰性能优于-20dB,且其实现简单。Strong narrowband interference may drown out BPL signal, make the BPL timing receiver fails in receiving BPL timing signal. The adaptive coherent model method is applied to suppress the narrow band interference of BPL timing signals in combination with the characteristics of the signal in BPL long wave time transmitting system. The method obtains the interference signal model by accumulating and averaging the sampled data, and then performs the shift subtraction operation with the original signal so as to suppress narrow band interference. By theoretical analysis and experimental simulation, the feasibility of the algorithm is proved. The performance of anti-interference is better than 20 dB, and it is easy to implement.

关 键 词：BPL 自适应相干模板法 罗兰-C 窄带干扰 

分 类 号：P127.1[天文地球—天体测量]