The key of Ultra-wideband(UWB) technology lies in how to generate the fast rise-time and short-duration pulse.
超宽带（UW B）技术实现的关键之一是如何设计并产生可以控制的UW B极窄脉冲。
Pulse: a regular, significant abrupt change of short duration in the level of an electric voltage or current.
脉动：电压或电流作有规则的，短暂的和明显的突然变动。
The PRFM pulse sequence is composed by 16 fixed-width and fixed-amplitude short pulses, in which the duration between two neighboring pulses is determined by pseudo-random number sequence.
此序列由16个固定宽度的高电平脉冲组成，两个相邻脉冲之间的低电平时间间隔是由伪随机数序列决定的。
While the information is quite difficult to estimate since it is very subtle and the pulse duration is very short.
但由于这一信息非常微弱，且脉冲信号的持续时间很短，多普勒变化率的精确测量也十分困难。
Digital systems use signals, which are of pulse form, that is, a series of short-duration square waves.
数字系统使用信号脉冲形成的，也就是说，一系列的短周期平方波。
Digital systems use signals, which are of pulse form, that is, a series of short-duration square waves.
数字系统使用信号脉冲形成的，也就是说，一系列的短周期平方波。
应用推荐