基于扩频多址的差转游标测距方法与应用

针对游标测距法在转发测距中无法实现多址测距的问题，提出了一种基于扩频多址的差转游标测距方法。该方法采用游标法实现高精度测距，采用直接序列扩频技术以正交的伪随机码（PN码）区分不同的测距信号，利用不同的差转频率区分不同的转发信标。基于该方法构建了测距系统，系统的测距精度可达亚米级。转发信标使用电池供电和无线通信调度，结构简单，成本低,功耗小,安装简单。该系统非常适用于工业场景的人员定位管理。

A Differential Vernier Ranging Method Based on Spread Spectrum Multi-access and Its Application

To solve the problem that the vernier ranging method cannot realize the multi-access ranging by transponder,the authors propose a vernier ranging method based on spread spectrum multi-access technology which uses differential frequency transponder.The method uses the vernier method to achieve high precision ranging,uses the direct sequence spread spectrum(DSSS) technology to distinguish different ranging signals with orthogonal pseudo-noise(PN) codes,and uses different differential frequencies to distinguish different transponders.A ranging system is constructed according to this method.The ranging accuracy of the system can reach sub-meter level.The transponder uses the battery power supply and wireless communication scheduling,and is featured by simple structure,low cost,low power consumption,and simple installation.The system is suitable for the personnel positioning management in industrial scenes.