摘要
着重分析了印制电路板(PCB)的温度变化对全球导航卫星系统(GNSS)接收机锁相环的影响。用静止的伪卫星发射类似GNSS的高载噪比信号,以减小径向动态和热噪声导致的跟踪误差,从而有利于评估PCB温度的影响。使用温度传感器ADT7320同时测量PCB和环境温度,并以晶振的频率变化和环路相位跟踪误差为指标,评估PCB温度变化对接收机跟踪环路的影响。实验表明:PCB温度的变化会降低环路的跟踪性能。特别是在环路带宽较窄时,温度变化导致的动态应力误差较为显著,对于利用载波相位测量值进行精密定位等应用来说不可忽略。
The effect of the printed circuit board( PCB) temperature variation on Global Navigation Satellite System( GNSS)receivers' phase-locked loop was emphatically analyzed. A stationary pseudolite was used to transmit GNSS-like signals with high carrier-to-noise ratio,which reduced the radial motion-induced dynamic stress error and the thermal noise-induced error,thus benefitting the assessment of the effect of PCB temperature. The temperature sensor chip,ADT7320,was used to measure the PCB and ambient air temperature simultaneously. The effect of PCB temperature variation on receivers' tracking loop was analyzed in terms of the oscillator's frequency variation and the loop's phase tracking error. The experimental results show that the PCB temperature variation will degrade the loop's tracking performance. In particular,the temperature variation-induced dynamic error is remarkable at a narrow bandwidth. This effect is not negligible for some applications,e.g. precision positioning using carrier phase measurements.
作者
徐兵
窦杰
窦磊
XU Bing,DOU Jie,DOU Lei(National Key Laboratory of Transient Physics,Nanjing University of Science and Technology,Nanjing 210094,Chin)
出处
《仪表技术与传感器》
CSCD
北大核心
2018年第6期45-48,共4页
Instrument Technique and Sensor
基金
国家自然科学基金项目(60904085)
南京理工大学瞬态物理国家重点实验室基金项目
国防科技创新特区基金项目
关键词
温补晶振
全球导航卫星系统
接收机
印制电路板
温度传感器
锁相环
temperature-compensated crystal oscillator
global navigation satellite system
receiver
printed circuit board
tempera-ture sensor
phase-locked loop
作者简介
徐兵(1988-),博士研究生,主要研究方向为多传感器信息融合和卫星导航定位.E-mail:bingxu_mail@163.com;窦杰(1991-),博士研究生,主要研究领域为基于软件接收机的卫星导航定位技术.E-mail:doujienjust@163.com;通讯作者:窦磊(1974-),副研究员,博士生导师,主要从事卫星导航、制导与控制方面的研究.E-mail:douleijs@163.com