A laser phase modulation system with acoustooptic modulator is described.
本文叙述了一种包含有声光调制器的激光调相系统。
In the model communications system, the modulation process also is loaded the digital signal in the carrier scope value, the carrier frequency or on the carrier phase.
在典型的通信系统中，调制过程是数字信号加载在载波的幅度值、载波的频率或者载波的相位上。
This paper studied the three-phase PWM(pulse width modulation) rectifier in dual PWM variable frequency speed regulation system.
对双PWM变频调速系统中的三相PWM整流器及其控制方法进行了研究。
The resonant soft switching inverter arc welding power source uses LCL type structure in the main circuit, and selects phase shifting pulse wide modulation technique in the control system.
研制的谐振式软开关弧焊逆变电源，主电路采用新型LCL结构，控制系统选用恒频移相调脉宽控制方案。
Chapter3: This chapter discusses the quantum cryptography system based on phase modulation polarization coding technology in details.
第三章：详细讨论了基于相位调制偏振编码的量子保密通信系统。
The application of phase-locked and synchronous detection reduce the cost of the whole system and improve the sensitivity. Carrier signal and modulation signal achieve entirely synchronous too.
这种采用锁相技术、同步检波的原理，降低了整个系统的成本，提高了灵敏度，并使得载波信号与调制信号完全达到同步。
The results show that the evolution of the steady-state output parameters of the system varies with the values of modulation parameters, group velocity dispersion and self phase modulation.
研究表明，系统的定态输出随系统的调制深度或调制频率、群速色散或自相位调制等参量值的变化而变化。
Loop frequency locking technique in phase modulation spectroscope technique R-FOG system has been researched.
对基于调相谱检测技术r -FOG系统中的环路频率锁定技术进行了研究。
The suggested system makes use of a single phase HFAC pulse density modulation(PDM) converter as the interface to connect energy storage unit and power source for induction motor drive system.
系统采用间接矢量控制技术，通过高频交流脉冲密度调制接口变换器，对功率进行协调控制。
Aiming at the complicated design of three-phase PWM (Pulse Width Modulation) rectifier by using nonlinear feedback method, a linear feedback approach based on inverse system method is presented.
针对三相脉宽调制(PWM)整流器控制采用非线性反馈方法使控制器设计复杂化的问题，提出一种基于逆系统方法的三相pwm整流器的反馈线性化控制方法。
A novelty space vector pulse width modulation (SVPWM) technique for the two-phase inverter-fed asynchronous motors system is proposed, which can be widely used in the low or middle power level field.
研究了二相逆变器-异步电动机系统的空间矢量脉宽调制(SVPWM)控制技术。
The system adopts direct digital synthetic (DDS) technology for building the sine wave generator to realize continuous regulation of amplitude, frequency and phase modulation.
系统采用直接数字合成（DDS）技术构建正弦波发生器，实现幅值、频率、相位等连续调节；
The system adopts direct digital synthetic (DDS) technology for building the sine wave generator to realize continuous regulation of amplitude, frequency and phase modulation.
系统采用直接数字合成（DDS）技术构建正弦波发生器，实现幅值、频率、相位等连续调节；
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