查询词典 amplitude modulation

It is a combination of the pulse amplitude modulation and frequency modulation types.

该仪器系统是由脉冲幅度调制和频率调制两种遥测系统复合组成的。

The two most common types of modulation used in radio are amplitude modulation and frequency modulation.

无线电所用最常见的两种调制方式是调幅和调频。

Amplitude modulation: The form of modulation.

调幅：调制的一种形式。

Frequency modulation minimizes noise and provides greater fidelity than amplitude modulation, which is the older method of broadcasting.

调频最大程度的减小噪音，并且比调幅的保真度高，调幅是一种较老的传播方法。

The performance of 2-level pulse amplitude modulation and analogue pulse width modulation system based on self-error-correction code was analyzed.

基于自纠错码的二级脉冲幅度调制与脉冲宽度调制光纤传输技术，对系统中的接收机灵敏度进行了分析。

The most important of the most commonly used analog modulation is the sine wave as a carrier perspective modulation and amplitude modulation.

最常用最重要的模拟调制方式是用正弦波作为载波的幅度调制和角度调制。

Then three candidate modulation schemes exploiting spatial dimensions are proposed. At last, the three modulation schemes are compared by power efficiency and bandwidth efficiency. It shows that spatial quadrature amplitude modulation scheme is appropriate for long distance wireless optical communications for its high bandwidth efficiency and spatial circular symmetry.

参照传统时域信号设计方案，提出了三种空间调制信号具体设计方案，并从带宽效率和功率效率两性能上进行了比较，结果表明正交幅度调制具有带宽效率高、功率效率低的特点，而且采用的信号点越多其带宽效率就越高，另外其空间信号图案还具有圆对称性，因此非常适合在空间带宽有限的远距离无线光通信中使用。

modulation is the transmission of information to be loaded onto a high-frequency signal in the process.amplitude modulation using signal to control the rate of carrier,with its linear modulation signal changes,and maintain the same carrier frequency.in the amplitude modulation,in accordance with the strength of signals in the spectrum of different components,it is divided into ordinary am (amplitude modulation standard am),with inhibition of bilateral carrier am,the carrier single sideband suppression am.the main difference is the different methods and structure of the spectrum.

摘 要：调制是将要传送的信息装载到某一高频信号上去的过程。振幅调制是用调制信号去控制载波的幅度，使其随调制信号线性变化，而保持载波的频率不变。在幅度调制中，根据已调信号的频谱分量不同，分为普通调幅、抑制载波的双边带调幅、抑制载波的单边带调幅。它们的主要区别是产生的方法和频谱结构不同。

Common AM, with bilateral, residual sideband and single sideband modulation, and so is the amplitude modulation of a few typical examples, and frequency modulation modulation in the point of view is widely used.

常见的调幅、双边带、残留边带和单边带等调制就是幅度调制的几个典型实例；而频率调制就是角度调制中被广泛采用的一种。

Residual amplitude modulation in electro-optical phase modulators results in unequal amplitude of modulation sidebands.

激光经电光相位调制后，由于剩余幅度调制的存在造成调制边带幅度不相等。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。