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调制波形     
相关语句
  modulation waveform
     Secondly, the unique orthogonal basic modulation waveform is found after study of symbol correlation on VWDK.
     接着研究VWDK调制的符号相关性,确定了唯一正交的基本调制波形并进行了性能分析;
短句来源
     This paper discusses the autocorrelation function and power spectrum of PCM/FM when frequency modulation waveform is a random series by binary pulse with length T. Then derives a correct expression.
     研究了当频率调制波形是一个长度为 T的二进制脉冲的随机序列时 ,PCM/FM或 FSK的自相关函数和功率谱 ,并推导出正确的表达式
短句来源
     The advantages of the presented PWM are verified by simulation. The switching angles and optimizing modulation waveform are also deduced.
     仿真结果表明,该方法极大地提高了输出电压调制深度和基波幅值,文中同时给出了输出电压开关切换角、最优调制波形等的求解方法。
短句来源
  “调制波形”译为未确定词的双语例句
     Research on the Chaotic Phase-modulated Waveform of Fuze
     引信混沌相位调制波形研究
短句来源
     This waveform library not only contains those typical radar signals like single-carrier frequency signal, encoded signal, LFM etc, but also include many hybrid modulated signals, like FSK/PSK signal, FSK/PPM signal, PSK/PPM signal, pseudo-random FSK/PSK signal, etc.
     波形库中既包含了传统的雷达波形,如单载频脉冲信号、LFM、编码信号等,又包括了复合调制波形,如FSK/PSK信号、FSK/PPM信号、PSK/PPM信号、伪随机FSK/PSK信号等。
短句来源
     80C196MC microcontroller is the core of the variable-frequency speed-regulated system. The sinusoidal pulse width modulation wave-form is produced by software programming,which controls IGBT's conducting and shutting off,and finally,the asynchronous motor's speed is controlled.
     80C196MC单片机作为整个变频调速系统的核心,通过软件编程,产生正弦脉冲宽度调制波形来控制绝缘栅双极晶体管的导通和关断,从而达到控制异步电动机转速的目的。
短句来源
     On the basis of design of DDS utilizing FPGA, it presented a method of realizing the altitude modulation by generating the main wave and the modulation wave respectively, and the frequency modulation by changing frequency tuning word of main DDS.
     在利用FPGA实现DDS的基础上,使用两路DDS分别产生主波形和调制波形,方便地实现两个任意波信号的幅度调制; 同时,通过调制波形数据实时控制主DDS的频率控制字,用数字的方法直接实现波形的各种频率调制。
     On the basis of design of DDS utilizing FPGA, it presented a method of realizing the altitude modulation by generating the main wave and the modulation wave respectively, and the frequency modulation by changing frequency tuning word of main DDS.
     在利用 FPGA实现DDS的基础上 ,使用两路 DDS分别产生主波形和调制波形 ,方便地实现两个任意波信号的幅度调制 ; 同时 ,通过调制波形数据实时控制主 DDS的频率控制字 ,用数字的方法直接实现波形的各种频率调制。
短句来源
更多       
  相似匹配句对
     Research on the Chaotic Phase-modulated Waveform of Fuze
     引信混沌相位调制波形研究
短句来源
     Approaches of Waveform Modulation of Multi-level High Voltage Inverters
     多电平高压变频中的波形调制方法
短句来源
     replay of waveform data;
     波形回放;
短句来源
     (2) The part for modulation signal;
     (2)调制信号源;
短句来源
     Wave Form Gate
     波形选通器
短句来源
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  modulation waveform
The second group, or non-filter, neurons, had BFs below 60 kHz, or above 64 kHz.3.Ninety percent of the filter neurons and 80% of the non-filter neurons responded to SFM signals with discharges that were phase locked to the modulation waveform.
      
Effect of modulation waveform on the dynamic response of methanol.
      
However, the distribution of the harmonics may be optimised to reduce the sound power by modifying the modulation waveform.
      
IQCreator enables the design of a wide range of user defined or system specific complex digital modulation waveform files for use with the 3020 AWG.
      
In the modulation-delayed case the modulation waveform was delayed by m 2 fmITD while c 0.
      
更多          
  modulation shape
In figure 4, the reference and carrier signals are synchronized, in order to generate a symmetrical modulation shape.
      
  modulated waveform
This opinion believes that modulating symbol sequence can affect, at optimum sampling epoch, the modulated waveform as oscillating carrier has done, and so the stochastic sequence leads to phase ambiguity.
      
The modes inside the cavity are excited by applying an appropriately modulated waveform on a dipoles gap.
      
The pulsed peak power of 23 mW with rectangular modulated waveform is generated.
      
A pulse-width modulated waveform is used to create an average voltage and an average current equal to the nominal voltage and current for the winding.
      
A wave packet is a square integrable modulated waveform well localized in both position and wave number.
      
更多          
  modulation signal
Block diagrams of the radiometer input and control units are given, allowing one to double the measurement range by an automatic selection of the modulation signal combinations without a decrease in accuracy.
      
In this paper, for full response linear modulation signal, a interpolation criterion is proposed.
      
Computing the cross correlation of the detector output signal against the applied modulation signal generates the chromatogram.
      
In ordinary communication systems, modulation signal is identical in the beam.
      
Increasing the amplitude of the modulation signal results in a loss of the frequency selectivity and a saturation of the gain.
      
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In this paper,a new generated method and the specific circuit of modulating waveform for long-wave time service in transmitter.Fi- nally,it is introduced which preliminary test situation in transmitter.

本文叙述了一种新的长波授时发射机调制波形产生方法的具体电路,最后介绍了和发射机初步联试情况。

The paper reports the pregress in our six beam subnanosecond Nd-glass high power laser facility. Now the improved laser system is able to generate pulses with the following parameters:

本文报道六路亚毫微秒钕玻璃激光系统近年研究进展概况。该系统经改进、提高后其输出脉宽分四档可调;~100ps、~250ps、~400ps及~1ns;输出波形基本可控制为光滑波形或调制波形;输出光谱宽度可调区为≤1或20~30;在输出脉宽~250ps时,单路输出能量控制在5~10J;在输出脉宽~1ns时,能量控制在10~15J。最后给出该系统总体运转稳定性的结果。

In this paper we study the optimum signal design scheme which achieves the minimum biterror probability for the multiuser data communication system in which all the subchannels are uncorrelatedHomogeneous Random Time-Varying Channels (HRTVC) and the users modulate antipodally a set ofassigned signal waveforms without carrier phase or bit interval synchronism among them. We first studythe minimum bi't error probability which can be achieved by signal design for multiuser data communicationsystem over the HRTVC....

In this paper we study the optimum signal design scheme which achieves the minimum biterror probability for the multiuser data communication system in which all the subchannels are uncorrelatedHomogeneous Random Time-Varying Channels (HRTVC) and the users modulate antipodally a set ofassigned signal waveforms without carrier phase or bit interval synchronism among them. We first studythe minimum bi't error probability which can be achieved by signal design for multiuser data communicationsystem over the HRTVC. The corresponding theoretically optimum signals and their physical realizability are next considered. We find that the physical realizable optimum signals' inphase and quadrature components should be complementaryly like a group of bandlimitted white noise. If we use these signals, there is no degradation due to the presence of other users, and the time dispersion of the HRTVC is beneficial and we can fully utilize it by spreading the bandwidth of the system or the time dispersion itself. In the limiting case. the bit error probability of the multiuser data communication system over theHRTVC is equivalent to that of the single user data communication system over the additive white Gaussiannoise channel.

本文研究所有子信道都是同样统计特性的非相关齐次型随机时变信道时,数字多用户通信系统中的最佳调制波形选择即最佳信号设计问题。用户各有自己的调制波形,各波形间不需载波相位及比特区间的同步。本文研究了利用信号设计在理论上所能达到的最小比特差错概率及其对应的最佳信号设计条件、该最佳信号的物理可实现性问题以及物理可实现的最佳信号。指出物理最佳信号的同相与正交分量应互补地像一组限带白噪声。其它用户的存在不会造成系统通信质量的降低。信道的时间扩散不但无害反而有益,可以用扩展系统的带宽(提高传信率、扩大多址容量、扩展调制波形频谱)或信道的时间扩散自身(增加通信距离、减小天线尺寸)来充份利用。在极限情况下,齐次型时变信道多用户数字传输系统将等效于恒参高斯信道中的单用户数字传输系统。

 
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