公开(公告)号：US20220317228A1

公开(公告)日：2022-10-06

申请号：US17842727

申请日：2022-06-16

Applicant: XI'AN UNIVERSITY OF TECHNOLOGY

Inventor： Xiaoli XI ,  Zhenzhu ZHAO ,  Jiangfan LIU ,  Jinsheng ZHANG ,  Yanning YUAN ,  Jiuxiang GAO ,  Chaofan TUO

IPC: G01S1/24 ,  G01S1/22

Abstract: Provided herein is a method for separating Loran sky and ground waves based on a Levenberg-Marquart algorithm, including: (1) collecting a plurality of Loran sky-ground wave signals followed by normalization to obtain a normalized signal; (2) preprocessing the normalized signal by inverse Fourier transform method to obtain an initialization parameter; (3) establishing a mathematical model for the Loran sky-ground wave signals in time domain; and (4) solving parameters of the mathematical model using the Levenberg-Marquart algorithm to separate the Loran sky and ground waves.