摘要
卫星信号质量好坏会影响用户的使用性能,利用软件接收机的跟踪结果可以实现信号质量评估.GPS L2C信号的伪码是由CM码和CL码时分复用(time division multiplexing,TDM)组成,根据其信号特点可以使用不同的跟踪方式进行跟踪.针对不同跟踪方法对信号评估精度的影响,重点分析了信号一致性,信号的相关性能等指标.通过仿真信号分析和实测数据验证,结果表明:联合跟踪相比于单分量跟踪其评估精度更高,且各项指标的评估结果都优于单条支路的评估结果,使用联合跟踪会带来更小的测距误差.
The quality of satellite signals affects user performance,and signal quality evaluation can be achieved by utilizing the tracking results of software receivers.The pseudo-code of GPS L2C signal is composed of CM code and CL code time division multiplexing.According to its signal characteristics,different tracking methods can be used for tracking.The influence of different tracking methods on the accuracy of signal evaluation is analyzed,and the signal consistency and signal correlation performance are analyzed.Through simulation signal analysis and measured data verification,the results show that the joint tracking has higher evaluation accuracy than the single component tracking,and the evaluation results of each index are better than the evaluation results of a single branch.The use of joint tracking will bring smaller ranging error.
作者
代智辉
饶永南
郭瑶
DAI Zhihui;RAO Yongnan;GUO Yao(National Time Service Centre,Chinese Academy of Sciences,Xi’an 710600,China;Key Laboratory of Precise Navigation and Timing Technology,Chinese Academy of Science,Xi’an 710600,China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Science,Beijing 101048,China)
出处
《全球定位系统》
CSCD
2023年第5期56-63,共8页
Gnss World of China
