Research On Signal Process In The Front Of Loran-C Receiver

Long Range Navigation System (Loran-C) is a kind of terrestrial precise radio navigation system, which is widely used in the navigation domain. How to estimate the real information from the received signals including noise and all kinds of interference to improve the performance of Loran-C receiver is a key point to study. So this paper launches the discussion to this respect.This paper is focused on the study of digital signal process in the front of the Loran-C receiver with adaptive algorithm. Firstly, it introduces the Loran-C system and its principle of work, and analyzes kinds of interference in the received signals of the Loran-C receiver. Secondly, it introduces the basic theory of adaptive filters, deduces some important conclusions, and several kind of adaptive algorithm are researched. Furthermore, according to the character of Loran-C signal, the performance of some kind of filter algorithm are simulated, analyzed, compared and summarized. At last, the dissertation presents the structure of the digital signal process module in the front of the Loran-C receiver and gives the system structure of the whole receiver.