GNSS姿态测量接收机性能分析

Analysis on performance of GNSS attitude determination receiver

利用同源射频平台实现了一种全球导航卫星系统(GNSS)姿态测量的接收机,接收机各射频电路相同且使用同一个晶振驱动,各射频通路之间有相同的信号处理特性。可以将射频通路分为主射频通路和从射频通路,主射频通路实现信号的捕获与跟踪,从射频通路利用差分相位鉴别器完成测量观测量提取。与传统使用独立接收机实现载波差分测向不同,主射频通道进入跟踪状态后立即输出观测量,无需检测载波半周跳变,实现快速姿态测量。利用GNSS姿态测量接收机、Novatel接收机以及惯性导航系统进行了跑车实验,实验结果表明:姿态测量接收机具有更好的载波测量输出能力,姿态测量精度和商业接收机相当。

A global navigation satellite system（ GNSS） attitude determination receiver is implemented using homologous RF platform,each RF circuit of the receiver is the same and is driven by the same one crystal oscillator,so each RF access has same character of signal processing. RF access can be divided into Master RF signal path and Slaver RF signal path,and master RF signal path completes acquisition and tracking task and the Slaver RF signal path deals with measurements extraction. Different from traditional independent receiver,observed quantity is output at the same time that Master RF access entering tracking state,no detection of half-cycle slips is needed,fast attitude measurements is realized. Dynamic experiment is carried out where the GNSS attitude determination receiver,Novatel receiver and the INS are mounted on a car,and experimental results show that the receiver has a better carrier measurement and output capacity,and the precision of attitude measurement is the same as commercial receiver.