可配置的多系统兼容导航跟踪通道设计

Tracking channel design of configurable multi-system receiver

摘要:

为了提高接收机的兼容性，降低设计复杂度和成本，基于FPGA+GPS的硬件平台，研究设计可配置的多系统兼容导航跟踪通道。首先介绍了多系统兼容跟踪通道的框架结构和功能模块，分析了可配置载波数字控制振荡器(NCO)、伪码NCO和码产生器等实现通道灵活可配的关键技术，最后，通过ModelSim仿真和实测GPS/COMPASS信号验证了通道的兼容可配性，资源分析结果也表明兼容通道相比独立系统减少一半左右的逻辑资源。

Abstract:

To improve the compatibility of the receiver, reduce design complexity and costs, this study researched the tracking channel design of configurable multi-system receiver based on FPGA and GPS hardware platform. The frame construction and function module of the tracking channel were explained firstly. Then the key technologies to implement the configurable channel, such as configurable carrier NCO(Numerically Controlled Oscillator), code NCO and code generator were analyzed. By simulating under the environment of ModelSim software and measuring with the GPS/COMPASS signals, it was verified that the channel was flexible and configurable. Resource analysis also showed that the logic resource was reduced by about a half compared to the independent system.