The system can provide 30 or 60 delta modulation digital voice channels.
系统能提供30或60增量调制音频信道。
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 digital transmission system Q factor-a new concept may be used to analyse the characteristics of digital transmission systems with different kinds of modulation.
数字传输系统的品质因数Q—这个新概念可以用于具有各种调制的数字传输系统性能的分析。
This paper takes modulation technique as main hint, summarizes the essential principle of analogue modulation technology, optical modulation and digital modulation technology.
以调制技术为主线，介绍有线电视系统中模拟调制技术、光调制技术和数字调制技术的基本原理。
With the digital PI modulation the output voltage of the power supply is very precision and stabilization.
采用数字PI调节，提高了稳态时输出电压的精度和稳定性。
This proposed modulation algorithm has simple format and clear physical concept, in addition, it's easy for the digital implementation.
所提出的调制算法，形式简单，物理概念明确，易于数字化实现。
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。
This paper discusses the technique of waveform coding for digital modulation and presents the idea of waveform coding based on biorthogonal wavelets.
讨论了数字调制技术中的波形成形问题，提出利用双正交子波实现波形成形的思想。
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。
As the core mobile communications technology, one of the digital modulation technique is to achieve high-speed, highly efficient mobile communication system and an important guarantee.
而作为移动通信核心技术之一的数字调制技术是实现高速、高效的移动通信系统的重要保证。
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 results show that digital modulation is with high resolution, total digitalization programmable, and low phase noise etc.
结果表明，数字调制具有分辨率高、全数字化可编程、相位噪声低等特点。
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。
A chaotic digital communication system via bifurcation parameter modulation is presented.
提出一种基于分岔参数调制的混沌数字通信系统。
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。
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。
A novel method is proposed for digital modulation classification based on Markov chain Monte Carlo (MCMC).
提出了一种基于马尔可夫链蒙特卡罗(MCMC)的数字调制分类方法。
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。
The implement of the digital modulation accelerates the sharp development of the communication.
数字调制的实现，促进了通信的飞速发展。
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。
Threshold and training parameters are not needed with this method, but can recognize higher-order digital modulation types.
该方法无需设置判决门限，也无需进行参数训练，且可以识别大于四阶的数字调制类型。
The full digital modulation system has high reliability and stability. The practice indicates that the economic and social benefits are gained after reconstruction.
实践表明，全数字调节系统可靠性高、稳定性好，改造后的经济效益和社会效益都有所提高。
The digital modulation applied in the front of HDTV needs good band efficiency and power efficiency.
在数字电视前端采用的数字调制方式需要具有良好的带宽效率和功率效率。
QAM (Quadrature Amplitude modulation) has been widely used in various digital communication systems due to its high modulation efficiency.
正交幅度调制(QAM)具有较高的调制效率，被广泛应用于各种数字通信系统中。
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 noise performance in binary digital modulation system is analysed in the presence of gaussian hybrid additive white bimodal noise.
本文以一类高斯型混合非高斯噪声双模噪声为背景噪声，详细分析了二进制数字调制系统的抗噪声性能。
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。
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。
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