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文章首先分析传统GNSS接收机的应用环境,在引入弱信号概念的基础上,讨论弱信号条件下进行导航的必要性,并阐述该领域目前的发展动向;接着由传统的GNSS信号跟踪基本原理和跟踪性能指标,分析传统的跟踪方法应用于微弱信号跟踪时存在的瓶颈;最后综述近年来微弱GNSS信号跟踪技术的研究现状,总结目前微弱GNSS信号跟踪技术的局限并指出今后的发展方向。
The article first analyzes the application environment of traditional GNSS receiver, introduces the concept of weak signal, discusses the necessity of navigating under the condition of weak signal, and expounds the current development trend in this field. Then, the traditional GNSS signal tracking basic principle and Tracking the performance index and analyzing the bottleneck of the traditional tracking method when it is applied to the weak signal tracking. Finally, the research status of the weak GNSS signal tracking technology in recent years is summarized, the limitations of the current weak GNSS signal tracking technology are summarized, and the future development direction is pointed out.