frequency shifting

PSpice Simulation Analysis of Frequency Shifting in Sound Reinforcement System

扩声系统移频增音的PSpice仿真分析

Object 's velocity effect on pulse to pulse frequency shifting RCS measurement

目标速度对脉间变频格式RCS测试的影响

Study of the Suppression of Frequency Shifting by Sliding Filter

滑频滤波器对频率移动抑制的研究

Design and Realization of Two-Channel Pulse to Pulse Frequency Shifting RCS Testing System

双通道脉间变频格式RCS测试系统

Simplified Design of High Range Resolution Pulse to Pulse Frequency Shifting Outdoor RCS Measurement Device

HRR脉间变频外场RCS测试设备的简化设计

Doppler frequency shifting and curve fitting differential methods for measuring velocity are analyzed and compared .

对测量速度的两种方法，多普勒频移法和曲线拟合微分法作了分析和比较；

Research on Two-Channels Pulse to Pulse Frequency Shifting Outdoor RCS Measurement Radar

双通道脉间变频外场RCS测试雷达的研究

This provides a part of explanation for the phenomenon of frequency shifting before some reservoir earthquake .

这为某种水库地震前的频率转移现象提供了部分的解释。

Two component LDV system with dual-differential acousto-optical frequency shifting and Its Applications

双差动声-光频移二维激光测速系统及其应用

Shortwave communication channel have the characteristics of multipath debilitating and Doppler frequency shifting .

针对短波通信信道的多径衰落和多普勒频移特性，研究了同步和信道均衡的相关算法。

Carrier-frequency Capture Base on Bispectrum Estimation under Extremely Low SNR and Large Doppler Frequency Shifting

极低信噪比大多普勒频移条件下基于双谱实现载频提取

The distance moving rate and Doppler frequency shifting are gathered to correct the dim speed to decrease the speed error .

研究用目标移动速度和多普勒频移相结合克服测速误差大和速度模糊的矛盾。

The frequency shifting and beam deflection of the Bragg acoustooptic interaction in cascade is analyzed according to general Bragg acoustooptic interaction theory .

根据声光互作用的一般理论，对不同的声光互作用条件下，级联布喇格声光互作用的频移和光束偏转进行了分析。

Object 's radial velocity effect on object 's radar cross section ( RCS ) outdoor measurement with pulse to pulse frequency shifting radar was researched .

研究了在脉间变频格式目标雷达散射截面（RCS）测试中目标径向速度对测试结果的影响。

In this paper , the suppression of frequency shifting by sliding filters in dispersion-managed soliton system with the Gaussian pulse has been studied .

利用有关理论研究了脉冲形状为高斯型的色散管理孤子系统中滑频滤波器对频率移动的抑制。

The vertical shear in the basic flow does not lead to the instability of Kelvin wave but to Doppler frequency shifting of its phase velocity .

基本气流在垂直方向的切变也不能导致Kel-vin波发生不稳定，只能导致Kelvin波的相速度发生Doppler频移效应。

A new method , frequency shifting mode ( FSK ), was firstly applied in ECD and a periodic change versus shifting time of film composition was found .

本文首次介绍了一种新的频率切换方式（即两种不同频率的方波以一定的时间间隔切换）。在这种方式下，薄膜组分呈现规则的周期性变化。

In view of the limitation of the accuracy of all the existing range alignment methods , an improved envelope correlation method is proposed based on the frequency shifting property of Fourier transform .

针对现有包络对齐方法存在对齐精度较低的缺点，该文在包络相关法的基础上，利用Fourier变换的频域移位性质，提出了改进的包络相关法。

Based on Weaver method of frequency shifting , the circuit structure of frequency shifter by using PSpice simulation software is analyzed and the useful information and valuable reference for sound engineers are provided .

依据Weaver法移频原理，利用PSpice仿真软件对移频增音电路进行了仿真分析，为广大音响设计工程师提供了有价值的参考。

We especially study the performance of OTDM add-drop multiplexer based on XPM-induced frequency shifting in highly nonlinear fiber . Then , we analyze the impacts of factors on frequency chirp .

最后研究了OTDM系统中的分插复用技术，重点研究了基于非线性光纤的XPM频移型分插复用器的性能，分析了影响频率啁啾的因素。

A advanced method for real-time harmonics cancellation based on frequency shifting principle is deduced , for the fact that the scope of the fault signal is very faint compared with the circuit of the motor .

针对转子断条故障信号相对电机基波电流微弱的特点，提出了一种经过改进的实时谐波消去方法。

The novel characteristics include intelligent fiber optic transmission equipment with remote monitoring and controlling , upward spreading channel spectrum using frequency shifting and multiplexing , online monitoring of the upward channel spectrum , and Chinese network management system .

其技术特点包括具有远程监控功能的智能化光端机，采用频率变换和复用技术扩展上行频带、上行频谱在线监测和多功能中文网管。

Harmonic analysis in the electric machine based on windows and interpolated FFT and harmonic expurgation according to amplitude In chapter 3 , a new method for real-time harmonics cancellation based on frequency shifting principle is deduced .

采用加窗插值FFT与逐幅谐波消去法的电机谐波算法第三章提出了一种基于移频思想的实时谐波消去算法。

The preprocessing compresses the data by frequency shifting , filtering and decimation . As a result , the computational load of motion compensation and imaging is reduced , which is favorable to real time image formation .

预加处理首先对原始数据进行频移和滤波，然后由滤波后的数据进行抽取，从而大大压缩了所需处理的数据，减小了运动补偿和成象的计算量，提高了成象处理速度。

Two usual designs of High-Range-Resolution pulse to pulse frequency shifting RCS outdoor measurement device are analyzed and compared . A simplified design is presented point to the peculiarity of the pulse to pulse frequency shifting RCS measurement One-Dimension imaging .

分析和对比了两种常用的HRR脉间变频外场RCS测试设备的设计方法，针对脉间变频格式RCS测试一维成像的特点提出了一种简化设计的思路。

The result shows that the discrepancy of the frequency shifting of atmosphere , metal coat of spatial object and concealed material is at least more than 10 times , thus it is applicable to use Brillouin scattering to detect spatial objects .

结果表明，大气布里渊散射频移与目标涂层及隐身材料布里渊散射频移之间相差至少大于一个数量级，由此得出利用分析布里渊散射光谱来探测空间目标的可行性。

They are rather lengthy . In this paper , only using Huygens - Fresnel principle based on moving sinusoidal phase grating we have derived the expressions of diffraction angles , the frequency shifting effects and the efficiency of diffraction for the phase grating .

本文用Huygens&Fresnel原理，以正弦位相光栅的移动为基础，推导了几种不同位相光栅的衍射角度，移频效应，及衍射强度的表达式。

In this paper , the noise equivalant power ( NEP ) of optical heterodyne system has been measured with a method based on acousto - optici germanium ' crystal modulator working at Bragg diffraction mode as a frequency shifting device in heterodyne system .

本文介绍了利用工作于Bragg衍射的Ge晶体声光调制器作为外差系统中的频移器来测量外差系统的噪声等效功率（NEP）的方法。

With natural interleaving technique , the front PFC could depress the current ripple and the stress on the power device . With frequency shifting and LLC series resonant topology , the End DC-DC converter can highly raise response speed and expend the ZVS range .

前级采用自然交错控制技术，可以减小电流纹波和开关管的电流应力；后级采用变频控制，LLC串联谐振拓扑，可以提高系统响应速度、增加ZVS工作范围。

This paper also researches the interleaved parallel control mode of two series load resonant converter units . Fixing pulse width , adjusting frequency and shifting phase is used to the control method .

针对串联负载谐振变换器调频控制的特点，对两单元串联负载谐振变换器交错并联的控制方式进行了研究，设计了定脉宽调频移相的交错控制方案。