数字调制的实现，促进了通信的飞速发展。
The implement of the digital modulation accelerates the sharp development of the communication.
数字调制技术是BPL时码发播和自主授时的基础。
Digital modulation technology is the foundation of BPL time code broadcast and independent time service.
最小频移键控（MSK）是一种性能较优的数字调制。
The minimum (frequency) shift keying (MSK) is a digital modulation with good performance.
全数字调制技术是当前通信领域研究的一个热点问题。
All-digital modulation is a hot field in modern communication systems.
数字调制方式的识别对于通信信号分析有着重要的作用。
Identification of digital modulation schemes plays an important role in signal analysis.
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。
A classification method based on Support Vector Machine (SVM) is given in the digital modulation signal classification.
正交频分复用(OFDM)是一种多载波宽带数字调制技术。
Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier broadband modulation technique.
基于OFDM的数字电视传输系统由纠错处理和数字调制等组成。
Digital television transmission system based on the OFDM consists of Error correction processing and digital modulation parts etc.
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。
This paper proposed a digital modulation signal identification method using the HHT and SVM methods.
介绍了如何利用DDS技术来产生调频波形及其他的数字调制波形；
This paper introduces how DDS techniques can be extended to produce frequency modulated(FM)waveforms as well as many types of digitally modulated waveforms.
主要是数字调制系统、扩展频谱通信原理和直接序列扩频系统等内容。
It mainly contains the digital modulate system, the SS communication theory and the direct sequence spread spectrum (DSSS) system.
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。
A novel method is proposed for digital modulation classification based on Markov chain Monte Carlo (MCMC).
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。
This pager introduces simply the interrelation between analog modulation signal and digital modulation signal on HFC networks recently.
QPSK作为一种先进的数字调制方式，特别适用于数字卫星通信系统。
QPSK as an advanced digital modulation technique is fit for the digital satellite communication system well.
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。
The results show that digital modulation is with high resolution, total digitalization programmable, and low phase noise etc.
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。
The digital modulation applied in the front of HDTV needs good band efficiency and power efficiency.
本文提出了一种基于数字调制和解调技术的电容式位移传感器的设计方法。
This paper presents a design method of capacitance displacement sensor based on digital synthesis technology.
介绍中频全数字调制技术的原理，重点讨论设计全数字调制器的关键问题。
The paper chiefly introduces the principle of all-digital modulation in IF. The key issue of how to design a all-digital modulator is emphasized.
针对现有数字调制方式识别类型有限的问题，提出一种基于星座图的分类算法。
A new classification algorithm based on constellation diagram is proposed to overcome the weakness of traditional algorithms by witch few digital modulation types can be recognized.
低字率、高采样频率的数字调制信号被转换成高字率、奈奎斯特频率采样的信号。
It transforms the digitally modulated signal from short words occurring at high sampling rate to longer words at Nyquist rate.
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。
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.
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。
This paper discusses the technique of waveform coding for digital modulation and presents the idea of waveform coding based on biorthogonal wavelets.
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。
A new digital modulation recognition method based on instantaneous information is proposed for the application under the low signal-to-noise ratio (SNR).
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。
Threshold and training parameters are not needed with this method, but can recognize higher-order digital modulation types.
本文的模拟调制识别算法具有运算量小的特点，而数字调制识别算法具有较好的扩展性。
The recognition method for analogue modulations has less computational complexity, and the method for digital modulation has flexibility and can be easily extended to the coming modulation types.
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。
Finally, the plan of implementing DQPSK digital modulation signal regeneration through adopting DSP chip is discussed and diagrams are given.
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。
Aiming at the spectrum spread problem of traditional digital modulation signals, a time-phase modulation (TPM) method with abrupt phase change characteristic is proposed.
一些不同的数字调制信号有着相同或相近的功率谱密度，但它们的谱相关函数却有明显区别。
Different types of digitally modulated signals that have similar, if not identical, power spectral density functions can have highly distinct spectral correlation functions.
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。
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.
通过主观测量和客观测量研究了单频、数字调制信号和雷达信号对调频电视系统的干扰效应。
The interference effects of single frequency, digitally modulated signal and radar signal to FM TV systems are studied by means of the subjective and objective measurements.
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