同时提高星载激光测距仪分辨率与动态范围的一种方法

A Method for Enhance Resolution and Dynamic Range of Laser Distance Meter at the Same Time

星载激光测距仪一般采用同步计数器法进行计时,时钟频率决定了测距分辨率,计时时间决定了动态范围,二者都与计数器的位数相关。计数器的位数限制了测距分辨率与动态范围的同时提高。提出一种计数器的实现方法,不但可以将测距分辨率提升至系统的极限,还可以在提高分辨率的同时,扩大测距仪的动态范围。

Time is generally measured by a counter in Laser distance meter on satellites. The resolution is determined by clock frequency, and dynamic range is reckoned by time. Both is relation to counter＇s bits. The enhancement of resolution and dynamic range at the same time is limited by how many bits of the counter. A arithmeic is proposed for not only enhancing resolution to its maximum, but also expanding dynamic range at the same time.