echo frequency

基本解释

The new methods can be used in both detection of FMCW echo and frequency estimation of correlative pulse train.
这两种方法既可用于多段线性调频连续波探测回波的积累检测，也可用于多个相参脉冲信号的积累与频率估计。
The basic work principle of a certain kind of Doppler radar is introduced, the relation between the echo Doppler frequency and other parameters is given.
介绍了多卜勒导航雷达的基本工作原理，推导了回波信号多卜勒频移与系统其它参量间的关系。
Based on discussing the characteristic of the echo frequency spectrum, signal generation principle of the echo signal and the hardware constitute of the ATE system are introduced.
在讨论回波信号频谱特性的基础上，介绍了回波信号的产生原理及自动检测设备的硬件组成。