Loran-C Signal Fast Acquisition Method and Its Performance Analysis
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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。Abstract: 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.
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Key words:
- Signal processing /
- Loran-C /
- Delay correlation /
- Fast acquisition /
- Anti-noise /
- Performance analysis
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