查询词典 pulse-time modulation

Based on the theory of phrase staying and the autocorrelation function, we design better performance nonlinear frequency modulation pulse compression radar.

基于逗留相位原理以及信号的自相关函数，设计了一种性能十分优越的非线性调频脉冲压缩雷达体制。

The application of ORTH in baseband modulation is investigated, and a new parametric Nyquist pulse design method is proposed.

对ORTH在基带调制的应用进行了研究，给出了一种新的具有可控参数的Nyquist设计方法。

Use is made of pulse-technique and intensity modulation of a cathode ray tube.

利用脉冲技术和阴极射线管栅极调亮法，可以在示波器上描绘出整套特性曲线，特别是正栅区域的特性。

Modulation instability of an elliptically polarized laser pulse in plasma.

作者简介陈华英|讲师|主要从事激光等离子体方面的研究工作|(1979-)，女，博士研究生。

We present the linear extrapolation which predicts the required optimum normalized fiber lengths for the optimum pulse compression experiments. Two of the most important nonlinear processes occurring in optical fiber are sefl phase modulation and stimulated Raman scattering .

我们从理论上首次分析了波破裂现象对光纤-光栅对激光脉冲压缩的影响，对以往的经验公式予以修正，给出了最佳脉冲压缩实验所要求的光纤长度的经验公式，以方便激光脉冲压缩实验中对光纤长度的选择要求。

The task of this project is to design a hardware platform for radar video simulation and calculate the pulse-compression video signal of linear frequency modulation radar system.

在深入分析了线性调频脉冲压缩信号产生过程和特性的基础上，结合16位定点DSP——TMS320C5402的硬件结构和指令系统的特点，编写了定点DSP程序，并对程序的计算量和计算结果进行了分析，表明算法的速度和精度都可以满足系统的要求。

In this study, two-tone stimulus paradigm with inter-pulse interval of 50 ms was used and two kinds of maskers, static frequency masker and dynamic frequency masker (up-sweep frequency modulation sound), were delivered to the animal before the probe under free field stimulation conditions.

自由声场刺激条件下，采用一定间隔的双声刺激模式(前一个声音为掩蔽声，后一个声音为探测声)，记录昆明小鼠下丘(inferior colliculus， IC)神经元的声反应。

After rigorously mathematical deduction, some valuable conclusions are drawn: at the multiple times of symbol period, discrete peaks of the PACA function appear with 3 peaks in group, which includes a larger peak located in the middle and the other smaller two located symmetricly beside the larger one. The distance between small peaks is modulation offset of pulse position PPM.

经过严格数学推导，指出了TH-UWB信号的PACA函数不但在字符周期整数倍处出现离散峰值，而且按三个峰值(一大峰值左右对称出现小峰值)成对出现，大峰和小峰的间隔就是PPM调制时间偏移。

Considering the ionospheric refractive index in geomagnetic field, the radiowave polarization plane rotation has been calculated. For linear frequency modulation pulse signal, the expression of Doppler shift error due to ionospheric dispersion characteristics is derived.

本文还计算了考虑地磁场时电离层双折射指数特性引起的电波极化面旋转角，推导出对于线性调频脉冲信号电离层介质色散特性引起的合成孔径时间内多普勒频移误差的表达式。

It not only includes the "highly resemble" jamming signals generation by adding distance, azimuth, velocity and envelop deceiving information to the original captured radar transmitted pulse, but also includes the "covering" jamming signal generation by an modulation which will get an unmatched processing result in the radar receiver's match filter.

提出&高逼真欺骗干扰&和&掩护式欺骗干扰&的概念，详细阐述了&预警雷达高逼真及掩护式欺骗干扰技术&的原理，具体内容包括对雷达实现距离、方位、速度、幅度起伏等&高逼真&欺骗信息调制，以及利用脉冲压缩失配法产生多目标干扰回波以完成&掩护式&欺骗信息调制。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。