罗兰-C信号快速捕获方法及其性能分析  

Loran-C Signal Fast Acquisition Method and Its Performance Analysis

作　　者：李实锋[1,2,3] 王玉林[1] 华宇[1,3] 袁江斌[1,2] 

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院大学,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：《电子与信息学报》2013年第9期2175-2179,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61127901)资助课题

摘　　要：罗兰-C系统与全球导航定位系统(GNSS)相结合已成为新的应用模式,为用户提供可靠的定位、导航和授时服务。针对传统罗兰-C接收机信号捕获时间长、抗噪性能差等缺点,该文提出一种基于延迟相关技术的罗兰-C信号抗噪快速捕获方法,并从理论分析和仿真实验两个方面验证了该方法的有效性,解决了强噪声背景下罗兰-C信号的快速捕获问题。结果表明:罗兰-C延迟相关捕获方法的捕获时间优于200 ms,抗噪性能优于-10 dB。The combination of Loran-C and Global Navigation Satellite System （GNSS） has become a new application mode, which provides reliable positioning, navigation and timing service for users. Based on the research on Loran-C signal system, considering its long signal acquisition time and poor anti-noise performance of Loran-C receiver, this paper proposes a new method of anti-noise and fast acquisition for Loran-C signal, which is based on delay correlation; and verifies the practicality of this method by theoretical analysis and carrying out simulation test. This method solves successfully the problem of fast acquisition of Loran-C signal in heavy noise environment. The result shows that the acquisition time of this method is less than 200 ms, the anti-noise property is less than -10 dB.

关 键 词：信号处理 罗兰-C 延迟相关 快速捕获 抗噪 性能分析 

分 类 号：TN966.4[电子电信—信号与信息处理]