罗兰-C数据解调与解码技术研究  

Research of Loran-C data demodulation and decoding technology

作　　者：李实锋[1,2,3] 王玉林[1] 华宇[1,3] 徐永亮[1,2,3] 

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院研究生院,北京100039 [3]中国科学院精密导航定位与定时技术重点实验室,西安710600

出　　处：《仪器仪表学报》2012年第6期1407-1413,共7页Chinese Journal of Scientific Instrument

基　　金：中科院西部之光项目(2008YB03)资助

摘　　要：罗兰-C数据通信已经成为罗兰-C系统扩展应用的重要方向,BPL长波授时系统和"长河二号"系统相继采用"Eurofix"技术实现了通信导航一体化。在对罗兰-C数据调制编码方式——三态脉冲位移字平衡调制、RS(Read-Solomon)和CRC(cycli-cal redundancy check)编码技术研究的基础之上,提出了一种基于交叉相关检测的罗兰-C数据解调、解码方法,并从数据获取、解调判决准则、RS纠错解码和CRC循环校验等方面详细论述了罗兰-C数据解调与解码的具体方法和算法流程,解决了罗兰-C接收机数据信息接收的关键技术。Loran-C data communication has become an important direction of extending the application of Loran-C system. The BPL long wave time service system and the ＂Changhe 2＂ system have adopted the ＂Eurofix＂ technology to achieve the communication navigation integration. This article is based on the research of Loran-C data modulation encoding scheme-3-1evel pulse position balance modulation, Read-Solomon （RS） and cyclical redundancy check （CRC） encodings. A Loran-C data demodulation and decoding method has been presented based on cross-correlation detection; and the specific method and algorithm of Loran-C data demodulation and decoding are discussed in detail from the aspects of data acquisition, demodulation decision guideline, RS error correction decoding and CRC checking. The key technologies for Loran-C receiver to receive data messages have been solved.

关 键 词：罗兰-C Eurofix 交叉相关检测 数据解调 RS解码 CRC校验 

分 类 号：TN966.4[电子电信—信号与信息处理]