Digital Loran-C Signal Processing Method Analysis

At present, the analog filtering method for Loran-C is mostly used, but it does denoise capability is not very, satisfactory, and with traditional digital processing methods, the signals can't be received in complicated environment. So, in order to denoise effectively, modern signal processing methods such as high-order spectrum, short time Fourier transform and Wigner-Vill distribution were used for processing Loran-C signal. The simulation results show that the denoising effects of the three methods are all superior to that of Fourier transform, and the influence of colored noise can be eliminated effectively by bispectrum methods. That is very important for reconstructing Loran-C signal under the condition of small signal-to-noise ratio and also lays the foundation for digital Loran-C signal processing.