基于MAX2769B的多系统兼容GNSS中频采样器设计与实现

GNSS软件接收机具有算法灵活性高、更新方便等特点，逐步发展为一种较为流行的卫星导航研究与应用平台。从处理多频多系统的角度出发，介绍射频前端的基本结构，对比了几款单芯片GNSS射频解决方案，详细介绍一套基于MAX2769B的多频多系统兼容中频采集系统的设计与实现过程,给出了多系统兼容的参数配置方法。对于采样器研制过程中与性能关系较为密切的部分，提供了设计参考建议与测试流程。针对设计的采样器，测试了其采集GPS系统L1频点信号的性能，并通过后端的软件接收机处理得到了信号捕获、跟踪、测量与定位结果，基于这些结果对中频采样系统的基本功能、多频处理能力等进行了分析和评估。

Design and Realization of Multi-system Compatible GNSS IF Sampler on MAX2769B

GNSS software receiver has features of high algorithm flexibility and convenience for updating. It is now gradually becoming a popular research and experimental platform of satellite navigation. In this paper, contrast and introduction of several GNSS single-chip solutions was made on the perspective of processing multi-band and multi-system. Design and implementation process of a RF collection system based on MAX2769B was also described in detail. For aspects that have close relationship with performance, some reference to proposed design and test methods is proposed. Based on the collection system, measurements of its performance for collecting GPS L1 signal was showed to prove its ability. With the help of solver code of software receiver, the acquisition, tracking, measuring and location results of specific frequency points evaluate the skills of design, including basic and multi-band functions.