摘要
介绍了一种非相干扩频测量体制的测距原理,分析了测距跳周问题对测距精度的影响,提出了一种测距数据处理算法。采用相位相差180°的双码钟采样法,对两个码计数和两个码相位进行采样和时差比对,判别出距离跳变的数值进行算法修正,有效消除了码计数对应的距离跳周问题,保证了系统的测距精度。该算法已经成功运用到多个实际工程中,系统测距精度完全满足指标要求。
The theory of a non-coherent spread spectrum ranging system is introduced. The influence of cyclic skipping on ranging precision is analyzed and a data processing method is presented. The double pseudo noise （PN） clock sampling method with 180° phase difference is used to perform sampling and time difference comparison for two PN count numbers and two PN phases. Then the skipping values can be dis- tinguished and corrected, and the cyclic skipping of PN count number value can be removed effectively, so that the system ranging precision is ensured. This method has been successfully applied in many projects and the ranging precision meets the technical specifications.
出处
《电讯技术》
北大核心
2017年第2期157-160,共4页
Telecommunication Engineering
关键词
非相干扩频测量
测距数据
跳周
双码钟采样法
noncoherent spread spectrum measurement
ranging data
cyclic skipping
double PN clock sampling method
