In this paper, direct modulation technology working at Microwave band is researched.
本文研究的是微波波段的直接调制技术。
The power penalty of direct modulation is smaller than that of external modulation at the same crosstalk level.
在相同串扰水平情况下，直接调制的功率代价小于外调制的功率代价。
The method of direct modulation is: change the ready information to current signal and then inject the LD or LED to obtain the corresponding light signal, thus the idea is source modulation.
直接调制是把要传送的信息转变为电流信号注入LD或LED，从而获得相应的光信号。
Direct digital synthesis (DDS) is an all digital frequency synthesis technique. Because of its special theory and construction, it has many kinds of modulation capability.
直接数字式频率合成(DDS)技术是一种全数字频率合成技术，其特殊的原理和结构使它具有多种调制能力。
The paper discusses and probes into the application of adaptive control in mine hoist direct-current velocity modulation system.
本文对自适应控制在矿井提升机直流调速系统中的应用进行了研究和探讨。
A new direct torque control (DTC) strategy of induction motors based on fuzzy space vector modulation (SVM) technology was proposed.
提出了一种基于模糊空间矢量调制(SVM)技术的异步电机直接转矩控制(DTC)方案。
An improved direct torque control (DTC) algorithm based on discrete space vector modulation (DSVM) is presented, and its simulation research is performed.
提出一种基于离散空间矢量调制(DSVM)技术的异步电机直接转矩控制(DTC)的改进算法，并对其进行仿真研究。
The intrinsic frequency of a beaker can be determined by means of direct determination, resonance or water drip modulation, and each of the methods makes use of the Lissajous figure.
烧杯的固有频率可以用直接测量法、共振法或水滴流调制法加以测定，各法中均利用利萨如图形。
The modulation types of data link for UAV are simple, such as BPSK, 2FSK , direct spread spectrum. The transmitted rate and anti-interference performance of them are limited.
目前，无人机数据链系统采用的调制模式都比较简单，如2FSK、BPSK、直接扩频技术等，传输速率与抗干扰能力有限。
By analyzing the direct frequency modulation and optical feedback effect of laser diode, a theoretical model for measuring small vibration displacement and velocity is discussed.
分析了在直接频率调制下，激光二极管中的光反馈效应，探讨了振动微小位移和速度的理论模型。
As compared with that from the electronics system by detecting and filtering direct the signal-to-noise (SNR) of modulation signal from the nonlinear bistable system is higher.
与直接经电子学系统检波、线性滤波后所提取的调制信号相比，前者所获调制信号的信噪比更高。
A communicator USES BPSK direct - sequence (DS) spreading modulation and BPSK data modulation.
一个传达者使用BPSK指导序列(DS)传播调制和BPSK数据调制。
The influence of bias current and modulation frequency on chaos dynamics of vertical-cavity surface-emitting laser (VCSEL) subject to direct current modulation is investigated by numerical simulation.
利用数值模拟的方法研究了电流调制下偏置电流和调制频率对垂直腔面发射半导体激光器(VCSEL)混沌动力学特性的影响。
The application of nonlinear PID method, which is a latest achievement in the field of control technology, in high voltage direct current (HVDC) modulation controller is studied.
对控制领域的新成果——非线性PID方法应用于直流输电调制控制器做了较为系统的研究。
In the field of today's wireless communication, a new trend is the technology of direct RF modulation.
在当今无线通信领域中，一个新兴的结构趋势就是发射信号的直接射频技术。
In modern wireless communication system, the direct RF-modulation for transmitting signal is a new developing trend of RF radio.
在现代无线通信系统中，对发射信号进行直接射频调制已成为射频无线电的发展趋势。
It was introduced that the hardware structure and working principle of ASIC Z87200 of direct-sequence digital-pulse modulation and demodulation, which was produced by ZLOG TELECOM.
介绍了ZLOG电信公司生产的Z872 0 0直接系列数字脉冲调制解调芯片的硬件结构及其工作原理。
Classical direct torque control method adopts the technique of 6 polygon flux linkage voltage modulation. It will generate torque pulsation and harmonic interference.
传统直接转矩控制技术采用的六边形磁链电压矢量调制方法，这会引起较大的转矩脉动和谐波干扰。
The AC-AC direct transformation control and the double-space-vector PWM scheme of the matrix converter are deduced, mathematic model of space vector modulation (SVM) matrix converter is built.
导出了矩阵变换器的交-交直接变换控制规律和双空间矢量PWM调制策略，建立了交-交直接变换控制方式下矩阵变换器的数学模型。
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 fuzzy control already has obtained the satisfactory effect in the alternating and direct velocity modulation system and the servo system.
模糊控制已在交直流调速系统和伺服系统中取得了满意的效果。
This paper introduces the application of the programmable controller, the direct current velocity modulation system, the frequency inverter and the electronic CAM switch in chamfering machine.
介绍可编程控制器、直流调速系统、变频器、电子凸轮开关在倒棱机中的应用。
This paper presents the origin of the exploitation of the direct current pluse width velocity modulation educational system and its circuit, moreover, goes on the waveform analysis.
介绍了直流脉宽调速实验系统的开发由来及线路，并进行了波形分析。
Abstract : A new type of optical signal transmission system based on organic light-emitting devices (OLED) has been investigated using direct light intensity modulation method.
摘要 ：采用直接光强调制的方法，建立了一种新型有机电致发光器件（OLED）的光电信号传输体系，研究了发光层掺杂、发光面积和预置电压对OLED响应速度的影响。
After the combination of direct flux control algorithms and over-modulation technique, a rapid dynamic torque response characteristic is also achieved in the flux-weakening control areas.
直接磁链控制算法与过调制技术相结合后，在弱磁控制区也实现了快速的动态转矩响应特性。
The low jitter transmission of pulse signals is realized by direct RF-modulation based on PLL frequency modulation.
介绍了锁相调频的基本原理，用锁相调频的射频直接调制方法实现了脉冲信号的低抖动传输。
To reduce the low speed torque ripple of induction motor based on direct torque control (DTC), a new control strategy-improved discrete space vector modulation is proposed.
针对传统的异步电机直接转矩控制在低速时存在转矩脉动较大的问题，提出了一种减小转矩脉动的直接转矩控制方法。
To reduce the low speed torque ripple of induction motor based on direct torque control (DTC), a new control strategy-improved discrete space vector modulation is proposed.
针对传统的异步电机直接转矩控制在低速时存在转矩脉动较大的问题，提出了一种减小转矩脉动的直接转矩控制方法。
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