This paper proposed a digital modulation signal identification method using the HHT and SVM methods.
提出了一种基于HHT和支持向量机的实际数字调制信号识别算法。
A classification method based on Support Vector Machine (SVM) is given in the digital modulation signal classification.
给出了一种基于支持向量机的数字调制信号分类器设计方法。
This pager introduces simply the interrelation between analog modulation signal and digital modulation signal on HFC networks recently.
简要叙述现阶段HFC网络中模拟调制信号与数字调制信号的相互影响。
Finally, the plan of implementing DQPSK digital modulation signal regeneration through adopting DSP chip is discussed and diagrams are given.
最后讨论了采用DSP芯片实现DQPS K数字调制信号再生处理的方案，给出了框图。
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。
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。
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.
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。
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.
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。
The experiment results justify the high recognition rate with less samples, thus the method can be used in the digital signal modulation recognition system.
实验结果表明，该调制识别方法在小样本下具有较高的识别率，可以应用在数字信号的调制识别系统中。
The system adopts FSK modulation way to carry out directly digital signal of axle tempratureand transmit to the receiving system of test train.
系统采用移频键控（FSK）调制方式，对轴温数字信号进行处理并发射，上传给便携式模拟接车系统。
The paper uses MATLAB to simulate ASK, FSK, PSK modulation of digital signal and spectrum analysis.
运用MATLAB语言模拟实现了数字信号的ASK、FSK、PSK调制与频谱分析。
Based on the characteristic extracting of RF signal in digital cable TV system, this paper puts forward an algorithm for modulation recognition between 16qam and 64qam RF signals.
从有线数字电视射频信号特征参数提取着手，建立了一套识别16QAM和64 QAM射频信号调制方式的数学算法。
Digital TV signal modulation is a message transmitting method which is expressed by some discrete states in carrier wave. Only carrier wave modulating parameter is detected.
数字电视信号的调制是用载波信号的某些离散状态来表征所传送的信息，在接收端只对载波信号的离散调制参量进行检测。
Based on the principle of digital orthogonal modulation, the generation question of wide-band signal is factually identical with how to generate base-band signal with high sampling in time domain.
在数字正交调制原理的基础上，宽带信号的产生问题实际上转换为如何得到高采样率下的时域基带信号。
A new approach to realizing the analog signal source for digital phase modulation, or the approach to storing PSK signal waves, is described.
本文介绍了一种实现数字调相系统模拟信号源的新方法，即PS K信号波形存贮法。
The digital control and signal processing for hydrodynamic modulation voltammetry is proposed. The rotation rate control signal was software generated.
本文报道了流体力学调制伏安法的数字控制和信号处理。
The interface circuit of ST7536 and power line finishes the modulation and demodulation of digital signal.
ST7536实现系统与电力线的接口，完成数字信号的调制与解调；
Data bits are allocated to the channels through a highly efficient modulation technique that converts digital data to electrical signal pulses.
数据通过一种高效的调制技术(即把数字数据变成电信号脉冲)分配给各个信道。
The moisture sensor makes digital modulation and compensation on signal non-linearity and temperature offset by adoption of microprocessor.
该传感器还借助微处理器对测量信号的非线性与温度漂移进行了数字化的修正和补偿。
This paper presents a new wideband digital beamforming method using subarrays and Linear Frequency Modulation (LFM) signal.
该文在基于子阵和发射为线性调频信号的前提下，提出一种宽带子阵数字波束形成方法。
According to GPS signal structure and modulation characteristics, a GPS intermediate frequency digital signal is simulated under the condition of noise environment.
根据GPS信号的结构和调制特点，加上环境噪声，模拟出GPS中频数字信号。
Identification of digital modulation schemes plays an important role in signal analysis.
数字调制方式的识别对于通信信号分析有着重要的作用。
Automatic identification of the digital modulation type of a signal has found applications in many areas, including electronic warfare, surveillance and threat analysis.
的数字信号调制类型的自动识别已应用在许多领域，包括电子战，监视和威胁分析。
The high-speed digital signal processing can complete the complicated the algorithm of control, and suit for the velocity modulation system that create the high performance.
数字信号处理器运行速度快，能够完成复杂的控制算法，适合于建立高性能的调速系统。
The Taguchi method is studied to derive calibration formulae of frequency and amplitude modulation of digital signal generator in whole range in this paper.
文中在校准应用研究中采用田口方法，根据数字信号源的频率、调幅及调频试验典型值推导出全量程校准公式。
And the high-speed digital signal processor (DSP) can deal with the complicated control algorithm, and suit for the velocity modulation system that create the high performance.
而数字信号处理器(DSP)运算速度快，能够完成复杂的控制算法，适合于建立高性能的调速系统。
A new digital modulation recognition method based on instantaneous information is proposed for the application under the low signal-to-noise ratio (SNR).
针对数字调制识别在低信噪比下的应用，提出一种新的基于瞬时信息的调制识别算法。
The digital part is responsible for combining digital signal processor DSP with ADC to realize frequency spectrum remove, which is to realize the function of modulation and demodulation.
数字部分为数字信号处理器DS P结合adc实现信号的频谱搬移，达到调制解调功能。
In the digital mobile communication, with the effect of modulation, transmission channels and demodulation, the received signal ineluctably has some distortion.
在移动通信系统中，信号经过调制发射、信道传输和接收解调的过程中，不可避免的会引入一些干扰，使得有用信号受到影响。
An alternative method is to transmit the combined digital signal from the parallel channels by frequency or phase modulation of common carrier.
另一种方法是对公共载波调频或调相的方法发送并列信道的组合数字信号。
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