Method for separating loran sky and ground waves based on levenberg-marquart algorithm

A method for separating Loran sky and ground waves based on a Levenberg-Marquart algorithm, comprising:

• (1) generating a plurality of simulated Loran sky-ground wave signals by simulation, and collecting a plurality of actual Loran sky-ground wave signals;
• and normalizing the plurality of simulated Loran sky-ground wave signals and the plurality of actual Loran sky-ground wave signals to obtain a normalized signal;
• (2) preprocessing the normalized signal to obtain an initialization parameter;
• (3) according to the initialization parameter, establishing a mathematical model for a Loran received signal in time domain;
• and
• (4) fitting parameters in the mathematical model using the Levenberg-Marquart algorithm to obtain a Loran sky-wave time delay, a Loran sky-wave amplitude, a Loran ground-wave time delay and a Loran ground-wave amplitude.