罗兰C接收机信号处理关键技术及发展

Key Signal Processing Technology and Development Direction of Loran-C Receiver

罗兰C接收机性能对系统的导航授时定位精度有显著影响。论文在介绍罗兰C接收机工作原理的基础上,对信号捕获、天地波识别、周期识别和ASF修正等信号处理关键技术进展进行了分析研究。研究表明,现有罗兰C接收机信号处理技术多针对单个问题进行理论研究且存在一定局限性,实际整体接收性能还有待进一步检验。通过对当前研究现状的分析比较,论文从高动态捕获、联合算法研究、非线性时变特性研究、ASF数据更新四个方面重点探讨了我国罗兰C接收机信号处理技术的发展方向。

The performance of Loran-C receiver has a significant impact on navigation positioning and timing accuracy.The framework of Loran-C receiver is presented and some signal processing technologies are researched in this paper,such as signal ac⁃quisition,the sky-wave and ground-wave identification,cycle identification and the additional secondary factor correction,etc.The results shows that the currently theoretical methods always focus on a single problem and has some limits,while the whole re⁃ceived performance is to be verified in pratical application.Comparing to the research status of existing signal processing technolo⁃gies,the paper investigates the development direction of Loran-C receiver in our country from,the high dynamic signal acquisi⁃tion,the joint algorithm,nonlinear time-varying characteristics of the system and ASF data update.