在典型的通信系统中，调制过程是数字信号加载在载波的幅度值、载波的频率或者载波的相位上。
In the model communications system, the modulation process also is loaded the digital signal in the carrier scope value, the carrier frequency or on the carrier phase.
得出了啁啾幅度和啁啾相位与调制频率的关系。
Chirping amplitude and phase changes with the modulation frequency are present.
光辐射的调制是指改变光波振幅、强度、相位或频率、偏振等参数使之携带信息的过程。
Modulation of light refers to changing parameters of light wave such as amplitude, intensity, and phase, frequency, polarization, etc. to make it carry message.
首先介绍从信号幅度、相位、频率及功率谱等特性中提取的三种特征参数，应用这三种参数采用人工神经网络对模拟调制信号进行了识别。
Three features parameters derived from the instantaneous amplitude, instantaneous phase, instantaneous frequency and power spectrum of analogue modulated signals are presented in this article.
直接数字式频率合成技术(DDS)是一种先进的全数字频率合成技术，本文基于DDS的相位调制功能，给出了一种DDS数字移相器的设计方案。
Direct digital synthesis (DDS) is an advanced all digital frequency synthesis technology, based on the PM function of DDS, this paper gives the design scheme of a DDS digital phase shifter.
调制的方法主要是通过改变正弦波的幅度、相位和频率来传送信息。
Modulation methods primarily through changes in the rate of sine wave, phase and frequency to transmit information.
包括幅值调制和频率（相位）调制两部分。
This modulation include either amplitude modulation or frequency(phase) modulation.
提供了一种实现改进残留频率误差和相位噪声估算的、适合于在高频通信系统中使用的单载波调制方案。
A single carrier modulation scheme suitable for use in high frequency communication systems is provided that achieves improved residual frequency error and phase noise estimation.
联合频率相位调制(JFPM)同时利用频率信息及相位信息，具有较高的频带利用率和功率效率。
Joint frequency and phase modulation (JFPM) utilize frequency and phase information to realize higher efficiency in the frequency and power.
利用光纤在流体中光的强度、相位、频率等受流量调制的特性，在传统流量传感器的基础上，可以制得新型的光纤流量传感器。
Based on the traditional flowmeter , a new type flowmeter is fablicated utilizing the features of the fiber2optic in fluid , in which the amplitude , phase or frequence of the light may be modulated.
当两相干光附加一按固定频率变化的相位差时，其干涉条纹的光强将随之交变，即为相位调制干涉。
In addition to alternating phase difference between two aims of interferometer, the intensity of light of the interference fringes will vary in the same frequency, which is called as phase modulation.
模块中的相位累加器，使系统具有较高的频率分辨率，可实现快速频率切换，很容易实现频率、相位和幅度的数控调制，有广泛的应用价值。
The phase adder in the model is widely applied which could enable system to hold high frequency revolution, fast frequency switching, and easily digital modulating of the signal's phase and amplitude.
提出了用高频光强调制、同源频率合成、软件鉴相的激光相位微距测量方法测量表面微观轮廓高度。
In this paper, the measurement method of high frequency brightness modulation laser phase for mechanic surface microcosmic appearance is given out.
实验得到了铜在常温下的调制频率与相位差间的实验数据，通过对实验数据的线性拟合得到了铜的热扩散系数，以及铜-不锈钢在300 K和20 K低温下的接触界面层热阻。
The experimental data of copper was obtained about the phase lag dependence of modulation frequency at normal temperature, and the thermal diffusivity of copper was acquired by using the linear fit.
对三波道干涉仪测向结果不受幅度调制和频率调制（相位调制）的影响进行了数学分析。
We also analysed the influence of amplitude modulation and frequency (or phase ) modulation on Interferometer Direction Finder.
该方法用短时分析提取数字调制信号在幅度、频率和相位随时间变化的特征，并利用这些特征对各种数字调制信号进行识别。
The approach is to use short-time analysis to extract the characteristics of time-varying amplitude, frequency and phase in a digital modulation signal, and applies them for simple identification.
研究表明，系统的定态输出随系统的调制深度或调制频率、群速色散或自相位调制等参量值的变化而变化。
The results show that the evolution of the steady-state output parameters of the system varies with the values of modulation parameters, group velocity dispersion and self phase modulation.
该控制技术利用FPGA产生各并联逆变器SPWM调制波的频率和相位，并确保输出电压同步。
FPGA is used to produce the SPWM frequency and phase for each inverter and ensures the synchronization of output voltages.
该控制技术利用FPGA产生各并联逆变器SPWM调制波的频率和相位，并确保输出电压同步。
FPGA is used to produce the SPWM frequency and phase for each inverter and ensures the synchronization of output voltages.
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