Acquisition method of Loran-C signal based on matched filter

摘要

A novel acquisition method of the Long-range navigation (Loran)-C signal based on matched filter is proposed to improve the acquisition performance of Loran-C signal under heavy noise environment. Higher signal to noise ratio (SNR) could be obtained through matched filtering the received signals. Then outputs are correlated with standard pulse signal and the correlation peaks are judged. Theoretical analysis and simulation experiments show that the proposed method can eliminate the noise effectively, the anti-noise performance is superior to -20dB, improving about 10 decibel (dB) compared with the traditional methods, and higher acquisition processing gain is obtained, while its implementation is simple. It has important significance for designing digital Loran-C receiver.