pulse-free signal

It can be found that: when writing the holography with long signal pulse and short reference pulse, the signal pulse can be reconstructed totally if the reading pulse is short enough;

结果发现，长信号脉冲和短参考脉冲干涉记录全息后，如果用足够短的脉冲读取，衍射完全再现了原输入信号脉冲。

Control circuit is taking pulse wide modulation circuit as core. By comparison of given signal and feedback signal of overvoltage, get the width-adjustable pulse signal for regulating output of welding power source so as to realize the colsed-loop control to arc-welding inverter.

控制电路以脉宽调制电路为核心，通过电压给定信号和反馈信号的比较，获得宽度可调的脉冲信号，调节焊接电源的输出，并实现对弧焊逆变器的闭环控制。

The strong pump pulse will change the spectrum of weak signal pulse by the XPM effect as a result that the time domain waveform of weak signal pulse is also changed remarkably by combining the dispersion effect.

受交叉相位调制作用的影响，强泵浦脉冲将改变弱信号脉冲的频谱，在联合色散效应后，弱信号脉冲在时域上的波形也将发生显著改变。

In time-division multiplex analog video signal system, the chrominance signal may be compressed along the time axis with the modulated clock pulse by the luminance signal so that the frequencies of time-compressed signal become homogeneous.

在时分多路复用（TDM）的信号系统中，用调制的取样脉冲沿时间轴压缩色度信号的同时，可使色度信号的频率匀化，从而克服信号的时间压缩与频带扩展的矛盾。

It points out that the speed does not bring about error when the phase difference between test pulse and exciting signal is 90 °.

认为在测量脉冲与激磁信号相位相差90°时，运动速度不会造成测量误差。

Test method of pulse signal generators

GB/T9318-1988脉冲信号发生器测试方法

It is found that selecting appropriate value of duty cycles of Gauss light pulse signal, frequency chirp and the roll-off factor of raised cosine pulse signal produced by the equalizer of an optical receiver can improve the sensitivity of the optical receiver.

发现适当选取高斯光脉冲信号的占空比、啁啾分量、光接收机均衡滤波器输出的升余弦频谱波形滚降因子的值可以提高光接收机灵敏度；

Then the factors of accuracy and the requirements of the emission module are analyzed. A specific laser diode with integrated MOSFET and capacitor and a dedicated driver chip are used in the system to output high-quality laser pulse as the ranging signal.

文章首先分析了激光脉冲发射系统对测距精度的影响因素和对发射模块的要求后，系统采用专用集成MOSFET和电容的激光二极管和专用的驱动芯片产生高质量的激光脉冲作为测距信号。

After simulation of MATLAB proof method is feasible, and carries on test to digitized pulse laser signal processing system, receives the good results.

经MATLAB仿真证明方法可行，并对数字化脉冲激光信号处理系统进行实验测试，收到良好效果。

Under the circumstance that the influence of atmosphere on laser pulse is ignored, the models of return signals and target response function are concluded, which indicates that return signals can be look as the convolution of transmission signal and target response function.

在忽略大气对激光脉冲的影响下，推导出接收信号和目标响应函数的理论模型，表明了接收信号可以看作是发射信号与目标响应函数的卷积。