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提出了一种单向式微波测距技术实现高精度快速车-车测距,对实现整个系统的精密时频同步,实现信号的有序发射和测量,系统取得高精度的原理等关键技术进行了设计和分析论证。借助于路网的固定性,提出了二级同步机制。首先应用有线时频同步技术、数字锁相技术和搬运钟方法解决了路网上信号机的精密同步,进一步通过对路网上车辆是否到达指定位置进行探测,实现了车辆与信号机之间的精密同步,并在此之上实现了车车之间的同步。设计了时分的信号发射模式和相应的测距信号格式。与目前的反射式微波测距或者激光测距系统进行了比较并指出了该系统的优势和特点。
A one-way microwave ranging technology is proposed to achieve high-precision rapid vehicle-to-vehicle ranging. Key technologies such as precise time-frequency synchronization of the whole system, orderly emission and measurement of signals, and high-precision system are achieved Design and analysis of the argument. With the fixedness of the road network, a two-level synchronization mechanism is proposed. First of all, the application of wired time-frequency synchronization technology, digital phase-locked technology and handling clock method solves the precise synchronization of signal machines on the road network and further achieves the precise synchronization between the vehicle and the signal machine by detecting whether the vehicle on the road network reaches the designated position or not , And on this to achieve the synchronization between the car. The signal transmission mode and the corresponding ranging signal format are designed. Compared with the current reflective microwave ranging or laser ranging system, the advantages and features of the system are pointed out.