GPSL5接收机的设计与实现

Design and Implementation of GPS L5 Receiver

在GPS现代化过程中,GPS L5新信号采用了QPSK调试方式,它由数据支路和导频支路组成。为了开发GPS L5新信号接收机,在研究信号特征的基础上,给出了接收机的总体设计思路并讨论了相应的捕获技术、跟踪技术以及导航电文的译码技术。接收机信号处理基于FPGA实现,连接卫星导航模拟器,该接收机成功捕获、跟踪和解调了GPS L5信号,并得到了正确的定位结果。对接收机的输出结果进行了测试,证明了设计L5接收机过程中所采用方法的有效性和可行性。

In the process of GPS modernization,GPS L5 is using QPSK modulation and it is composed of an in-phase message and a quadrature pilot. In order to design GPS L5 receiver,the main idea of the designing is provided and the corresponding technology of acquisition, tracking and demodulation are discussed based on the knowledge of the character of the signal. The signal processing unit is based on FPGA. The receiver can acquire,track and demodulate GPS L5 signal of the GNSS simulator,and can give the right result of the position information. The validity and feasibility of the design method are proven by testing the receiver