【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。更多还原

【Abstract】 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-level 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.更多还原