摘要
导航电文是全球卫星导航系统(GNSS)的关键要素,依靠由系统广播的导航电文所提供的信息数据,接收机用户得以正确计算出其位置并获得精确的时间信息。导航电文的数据内容取决于系统控制段,系统确保电文数据的精度和时效性至关重要,而控制段误差则通过电文传递给用户。从接收机用户性能的角度分析了GNSS导航电文的设计依据,所涉及的用户性能主要包括解调门限、首次定位时间、精度和完好性。阐述了支持上述电文分析的软件工具设计与实现。
The navigation messages are the key elements of the GNSS systems. From these navigation information the receiver users compute their correct positions and acquire the precise time information as well. The accuracy and timeliness of the message data depend on the GNSS system control segment, and the control segment errors would transfer to the users. From the point view of the receiver users,the performance indicators of the GNSS navigation messages are presented,in terms of the data demodulation threshold, time to first fix, accuracy and integrity. Finally, upon the above analytical models, the design and implementation of an analysis software for the GNSS navigation messages is performed.
出处
《无线电工程》
2013年第5期35-38,共4页
Radio Engineering
关键词
GNSS
导航电文
用户性能
分析软件
GNSS
navigation message
user performance
analysis software
