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sine wave modulation
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  “sine wave modulation”译为未确定词的双语例句
     In this paper,a simple and practical circuit for laser diode modulation is presented,the principle circuit and the principle of choosing component are given,at last,application in sine wave modulation in non cooperative target phase shift laser rangefinder is introduced.
     本文介绍了一种简单有效的半导体激光器调制电路,给出了电路原理图,元件的选择原则,最后介绍了在非合作目标相位式激光测距系统中实现正弦调制的应用。
短句来源
     The switch-modulation based square wave high-voltage amplifier with large force-voltage factor was designed to improve the overload capacity of electrostatic apparatus since the overload capacity of sine wave modulation based suspension system are limited by the breakdown field intensity.
     受击穿场强限制,静电式仪表采用正弦波高压放大器不能满足过载能力的要求,为此研制出了一种出力系数大的开关调制式方波高压放大器。
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  相似匹配句对
     The detection of sine wave in yawp
     利用相关技术检测噪声中的正弦波
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     The combined sine-wave signal proposed by R.
     对R.
短句来源
     Study on the Strategy of Sine-Wave Modulation in Active Inverter
     有源逆变和正弦调制策略的研究
短句来源
     r and the wave potential (?) .
     _r和波动势(?)
短句来源
     ON SINE SERIES
     关于正弦级数
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  sine wave modulation
An additional sine wave modulation with very good linearity up to high voltages allows capacity versus voltage measurements in a large frequency range.
      
One with a 100strain square wave modulation function at a period of 4 min, and the other with a sine-wave modulation of period 2 min.
      


By studing of the optimum of the symbol weighted wave shape, a new type of quadrature overlapped modulation that is called QOTSW (Quadrature Overlapped Triangular Sine Wave) modulation using a triangular wave added to a sine wave as a symbol weighted waveform is presented. The performance of the modulated signal has been investigated that shows the power spectral density is narrow and the sidelobe drop off very fast. The normalized power of out-of-band is also...

By studing of the optimum of the symbol weighted wave shape, a new type of quadrature overlapped modulation that is called QOTSW (Quadrature Overlapped Triangular Sine Wave) modulation using a triangular wave added to a sine wave as a symbol weighted waveform is presented. The performance of the modulated signal has been investigated that shows the power spectral density is narrow and the sidelobe drop off very fast. The normalized power of out-of-band is also very small. The experimental result is in agreement with the theoretical calculation. The problem in relation of application for QOTSW modulation has also been discussed.

本文研究了信码加权波形的优化,提出采用三角波叠加正弦波作为加权波的正交重叠调制方式,并称为QOTSW调制方式。研究了为获得具有窄的功率谱密度的已调信号的特性,其旁瓣滚降很快且带外的归一化功率也很小,实验的结果和理论的计算是一致的,有关这种调制方式的实用问题也作了讨论。

Laser diode is the most important laser in practice,it can be modulated by the current directly.In this paper,a simple and practical circuit for laser diode modulation is presented,the principle circuit and the principle of choosing component are given,at last,application in sine wave modulation in non cooperative target phase shift laser rangefinder is introduced.

半导体激光器是实用中最重要的一类激光器,它具有可直接调制的特点。本文介绍了一种简单有效的半导体激光器调制电路,给出了电路原理图,元件的选择原则,最后介绍了在非合作目标相位式激光测距系统中实现正弦调制的应用。

Miniature passive hydrogen maser is developed at Shanghai Observatory which employs compact cavity design and square wave frequency modulation. Electrode loaded resonant cavity is used in passive hydrogen maser to reduce the size. Other design in the physical part of the passive hydrogen maser is similar to the SOHM Ⅲ active hydrogen maser developed by Shanghai Observatory. Electronic part of the passive hydrogen maser comprises two frequency lock loops; 5 MHz crystal oscillator frequency is locked to the...

Miniature passive hydrogen maser is developed at Shanghai Observatory which employs compact cavity design and square wave frequency modulation. Electrode loaded resonant cavity is used in passive hydrogen maser to reduce the size. Other design in the physical part of the passive hydrogen maser is similar to the SOHM Ⅲ active hydrogen maser developed by Shanghai Observatory. Electronic part of the passive hydrogen maser comprises two frequency lock loops; 5 MHz crystal oscillator frequency is locked to the hydrogen emission line and resonant cavity frequency is locked to the crystal oscillator frequency. Square wave frequency modulation is used in both loops in order to avoid the even harmonics in the sine wave modulation. At present, the initial test is finished. Compared with the active hydrogen maser, we get a frequency stability of σ(2,τ)=1 0×10 -11 τ -1/2 (1 s< τ <5×10 4 s). Next we will do some work to improve the performance of the miniature passive hydrogen maser.

介绍了上海天文台被动型小氢钟的设计和研制 ,给出了初步的测试结果。这种小氢钟应用了电极负载腔。在伺服环路上采用被动的工作方式和腔的自动调谐 ,用方波调制的方法得到误差信号。和传统的主动型氢钟相比 ,它的整体体积减小 ,重量降低。经过初步测试 ,这种被动型小氢钟的频率稳定度为σ(2 ,τ) =1 0× 10 - 1 1 τ- 1 2 (1s<τ <5× 10 4 s)。

 
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