基于梳状滤波器的罗兰C交叉干扰抑制技术研究

Cross-Rate Interference Suppression Technology in Loran-C Based on Comb Filter

罗兰C信号在多台链信号覆盖区域受到的交叉干扰直接影响其导航定位与定时精度。针对当前周期积累等方法的不足,采用梳状滤波器对数字采样后的信号进行数字前端预处理,通过仿真验证了该方法的有效性和抗干扰能力。基于该方法开展了实际信号接收,验证了该方法的实用性。

The cross-rate interference of Loran-C signal in the area covered by multiple chain signals directly affects its navigation positioning and timing accuracy.Aiming at the deficiency of the current periodic accumulation method,the comb filter is used to preprocess the digital signal after digital sampling,and effectiveness and anti-interference ability of the method are verified by simulation.The practical signal receiving is carried out based on this method,and the practicability of this method is verified.