In communications, an amplitude modulated signal in which the amplitude of the carrier is reduced to zero for some part of the cycle of the modulating waveform. 通信技术中的一种调幅信号,其载波的振幅在调制波形周期的某些部分减少到零。
At the receiver, the modulated optical carrier can be examined from a frequency filter to render target detection. 在接收端,通过频率滤波实现对编码信号的提取,由编码信号的信号处理实现激光雷达水下目标探测。
In communications, the amplitude variations of an amplitude modulated carrier wave. 在通信技术中,调幅载波的幅度变化图。
FDM assigns a discrete carrier frequency to each data stream and then combines many modulated carrier frequencies for transmission. 它为每个数据流指定一个离散的载波频率,然后合并调制过的载波频率进行传输。
The process of retrieving intelligence data from a modulated carrier wave; the reverse of modulation. 从调制过的载波信号中检出信息数据的过程,是调制的逆过程。
The power of the modulated carrier wave is increased by the RF power amplifier. 射频功率放大器增加了调变载波的功率。调制器载(波)频(率)
The Time Domain Wave Form and Frequency Spectrum of Modulated Signal of uexp ( tt/ Pw) Multiply by Carrier with Uniform Phase Noise. 单边递减波电压讯号乘上含有均匀相位杂讯载波之调变讯号时域波形及频谱。
The common points of photoelectrical conversion are: the information is modulated on carrier wave through all kinds of domino effects ( engine, thermal, sound, electronic, magnetic), and then demodulated, through this course we can realize photoelectrical conversion. 采用光电检测的共同特点是:待研究的信息通过各种效应(机、热、声、电、磁)被调制到光载波上,然后将这些有用信号解调出来,实现光信号→电信号的转换。
The digital speckle fringe pattern is modulated by spatial carrier in large-shearing electronic speckle pattern interferometry ( ESPI). The carrier is introduced by rotating the reference plane a small angle. 将电子散斑干涉场的载波调制引入到大剪切电子散斑干涉中,通过对参考物的微小偏转引入载波条纹;
In virtue of domino offect of Raman scattering, it's scattering light intensity is modulated by temperature, so Raman scattering light can be considered carrier of temperature information and used for temperature demodulation and system of measure temperature. 由于Raman散射具有温度效应,其散射光强度受温度调制,可作为温度信息的载体,用于温度解调及测温系统设计。
Phase Solution of Modulated Fringe Carrier Using Wavelet Transform 利用小波变换求解载波条纹的相位调制
To estimate carrier frequency of digitally modulated signal whose modulation type is unknown, a carrier frequency estimation method for digitally modulated signal is proposed. 针对未知调制类型情况下数字调制信号的载波频率估计问题,提出了一种适用于数字调制信号的载波频率估计方法。
^ Program Controlled Phase Measurement Equipment of Pulse Modulated Carrier for Microwave Amplifiers 微波放大器脉冲调制载波相位程控测试仪
A simplified model for the transmission of rectangular-pulse modulated carrier through waveguide in the form of segmented linear function is derived based on the results obtained through saddle point method, and its validation is verified by comparison with the numerical results of Hosono's method. 本文基于鞍点法的结果推导了以分段线性函数表示的矩形脉冲调制的正弦波在波导中传输后的包络,并通过与用Hosono方法得到的数值结果比较验证了此公式的正确性。
The Multi-Dotted Sampling and Frequence Modulated Carrier Transmission of Gas Sensitive Signals as Long Distance 气敏信号的远距离多点采集与调频载波传输
Therefore, it introduces the method of pulse modulated carrier as well as the realizing the circuit diagram. 从而提出了抑制脉冲载波的解调方法,并给出实现这一方法的电路框图。
In order to overcome ISI, an improved method based on orthogonal frequency division multiplexing ( OFDM) is proposed, which directly modulated the real part of the transmitting data on the proper carrier. The structure of the system was simple. 为了克服码间干扰,设计了一种改进的基于正交频分复用(OFDM)技术的水声通信方法,直接将发射数据的实部调制到高载频进行传输,结构简单。
First, the assistant carrier frequency modulates the laser bean in intensity, speech signal is modulated to the assistant carrier frequency in phase, the receiver detects the laser's intensity. 先用副载波对激光束进行强度调制,语音信号通过玻璃振动被相位调制到高频副载波上。
The research of transponder goes side by side with the TT& C technology, the tracking, telemetering and command signal are all modulated on a united carrier throught several subcarriers, and FDMA is adopted in USB system. 应答机的研究是与测控技术的发展同步进行的,USB测控体制中将跟踪测轨、遥测和遥控信号通过多个副载波调制在一个统一的载波上,采用的是线性调相频分多路体制;
At present, phone and wireless frequency modulated nets are the main physical carrier of information linking and communication. Because there are some intrinsic drawbacks in access to Internet by phone net, attention should be paid to the wide band net technology. 目前,电话网与无线调频接入网是信息联接与通信的主要物理载体,但由于电话接入因特网存在一些固有的缺点,使得我们注意力转向宽带网络技术。
It is shown that the band gap of Mg doped CdSe can be modulated to cover almost the whole visible light region. For the Ag and In doped CdSe systems, the type of conduction can be changed, and the concentration of charge carrier can be raised. 我们的研究表明,Mg元素掺杂CdSe可以调节系统的光学带隙,使其光响应范围基本覆盖整个可见光区;Ag和In掺杂CdSe可以改变其导电类型,提高载流子浓度。
With two light source generating optical carrier, the modulated carrier signal is processed by microwave photonic filter, completing instantaneous frequency measurement, but it is complex, high cost and a small range of bandwidth. 利用两个光源产生光载波,采用光子滤波器对调制载波信号进行处理,可以实现瞬时测频,但结构复杂,成本较高,测频带宽窄。
In the modern digital wireless communications, digital data are modulated onto a RF carrier and transmitted to a receiver, which down-converts the RF carrier to base band for demodulation. 在现代无线通信系统中,数字信号被调制到载波上,并经过天线发送到接收器。在接收器中,经过调制的射频信号被下混频至基带,以便于解调的进行。