A method for selecting the modulation signals of multiple HVDC supplementary controllers is proposed.
提出一种多直流附加控制器调制信号的选取方法。
A new frequency estimation technique for BPSK modulation signals embedded in strong noise is proposed.
在强噪声背景下，针对BPSK调制信号，提出了一种新的频率估计技术。
The effect of chaotic switching modulation signals of different chaotic characters on reducing the level of EMI is analyzed.
对不同性质混沌调制信号降低电磁干扰水平效果进行了分析。
TACAN beacon transmits pulse amplitude modulation signals in all direction, including bearing and distance information relative to the beacon.
塔康信标台全向发射脉冲幅度调制信号，隐含空中目标相对于信标台的方位和距离信息。
In this dissertation the pulse compression performances of linear frequency modulation signals (LFM) and the algorithm of MTI/MTD are analyzed.
全文主要分析了线性调频信号（LFM）的频域脉冲压缩方法及MTI/MTD的算法；
Amplitude modulation is to control the amplitude of signal carrier and make it change linearly with modulation signals and maintain its frequency.
幅度调制是用调制信号去控制载波的振幅，使其随调制信号线性变化，而保持载波的频率不变。
To the 90's, a complex digital modulation with the rapid development of communication technology, testing signal mainly based digital modulation signals.
到了90年代，复杂的数字调制加上通信技术的迅猛发展，测试信号主要以数字调制信号为主。
The algorithm is verified by experiments and the modulator can produce digital modulation signals with good EVM(Error Vector Magnitude) and spectrum mask.
通过验证，所产生的调制信号具有良好的误差向量幅度（EVM）和频谱特征。
When the Angle modulation signals made up of the message model have passed through a randomly time-varying channel, a complex nonlinear estimation model is formed.
当此消息模型构成的角调信号通过随机时变信道后，形成复杂的非线性估计模型。
Aiming at the spectrum spread problem of traditional digital modulation signals, a time-phase modulation (TPM) method with abrupt phase change characteristic is proposed.
针对传统数字调制信号频谱扩展问题，提出具有相位突变特性的时相调制(TPM)方式。
The paper analyzes the interference rejection of Quadrature amplitude modulation signals in the presence of carrier phase jitter, sinusoidal interference and white Gaussian noise.
文章分析了存在载波相位起伏、正弦干扰、高斯白噪声时正交调幅数字系统的抗扰性。
In the scheme, a set of feature parameters are extracted from signal spectrum and constellation based on the differences between digital mixed signals and common digital modulation signals.
该方案利用数字混合信号与常用数字调制信号在信号频谱以及星座点的差异提取特征参数进行自动识别。
Simulation results demonstrate: the chaotic modulation signals generated from the four kinds of chaotic sources can all reduce the peak level of the input current and the output voltage spectrums.
仿真结果表明：四种混沌源调制生成的混沌开关调制信号，均能够降低电源的输入电流及输出电压的频谱峰值。
This paper analyzes a kind of chaotic modulation signals, the phase-modulated radar signals are generated by chaotic signals, at the same time the ambiguity function of the coded signals is given.
本文研究了一类混沌编码信号，利用混沌信号进行雷达信号的相位编码，并且计算了这类编码信号的模糊函数。
But any message carried by these signals would probably be lost because the receivers can't pick up the modulation, or rapid variations, in the base signal.
但是任何携带信息的信号都可能丢失，因为接收者在信号基地不能收集到变调或快速变化的信号。
We then introduce some commonly used analog modulation methods and discuss how to receive the signals.
然后我们介绍一些常用的类比调变方法，并讨论如何接收这些信号。
The automatic modulation identification for communication signals is a still important problem in the intercepted signal processing.
通信信号的自动调制识别在截获信号处理方面是一个十分重要的课题。
Chaotic signals at different wavelengths can be generated by adjusting the pump power, modulation frequency and tunable filter, and chaos synchronization is achieved.
通过调节泵浦功率、调制频率和可调谐滤波器，可以产生不同波长的混沌信号，并实现混沌的同步。
In the transmit direction, the transceiver provides RF signals to the power amplifier, which amplifies the signals based on gain and ramp information for a given modulation type.
在发送方向，收发信机向功率放大器提供射频信号，功率放大器根据给定调制类型的增益和斜坡信息对信号进行放大。
In pulse code modulation, the representation of the quantized samples of an analogue signal by character signals according to a defined code.
在脉码调制技术中，按照确定的代码由字符信号对模拟信号量化采样的表示法。
Quadrature Amplitude Modulation (QAM) is used to transfer signals by digital TV system based on DVB_C standard.
基于DVB_C标准的数字电视系统采用正交幅度调制(QAM)传送信号。
This paper analyses the frequency characteristics of the gear meshing and the signals due to amplitude and frequency modulation.
本文分析了齿轮传动的频率特性和它所产生的频率和幅值调制信号。
This paper chiefly introduces 4dpsk signals' modulation and demodulation.
本文主要介绍4dps K信号的调制与解调。
Firstly, this thesis introduces correlative information, such as radar theory, modulation, matching filter, ambiguity function, in the domain of processing of radar signals.
本文先介绍了雷达基本工作原理以及调制、匹配滤波、模糊函数等雷达信号分析的相关知识。
Furthermore, the expression of stationary bit error rate of system output corresponding to equiprobability quaternary pulse amplitude modulation (PAM) input signals was deduced.
给出了当输入信号为等概率的四进制脉冲幅值调制（PAM）时，系统输出理论渐近误码率计算公式。
Then, the paper introduces the math module and achieving method of software modulation and demodulation of common digital modulating signals used in telecontrol & telemetry system.
接着介绍了遥控遥测常用的数字调制信号的软件调制解调的数学模型和实现方法。
This scheme exhibits a good PAPR reduction performance, and for signals of high level modulation, such as 16qam and 64qam, it approaches the best performance of all SLM schemes.
结果表明该方案在抑制峰均比方面呈现出很好的性能，对于高阶调制信号，如16QAM和64qam，它甚至达到选择性映射所能实现的最佳性能。
To improve its performance, a carrier modulation and double light route compensation are necessary for detecting faint optical power signals.
为改善传感器的性能，微弱光强信号的检测需要载波调制和双光路补偿。
A new method of modulation identification for communication signals, using wavelet transform to extract characteristics and based on support vector machines (SVM), is proposed.
提出了一种应用小波变换提取分类特征的基于支撑矢量机的通信信号调制识别方法。
Error propagation caused by noise can be avoided by precoding the data at the transmitter prior to modulation and decoding operation of received signals.
在调制信号前采用数据预编码，对接收信号进行相应译码，以消除信道中噪声引起的差错传播。
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