信号调制

硬件电路系统包括LED光源驱动电路、信号调制电路、DSP硬件电路、显示电路。

Circuitry involve LED drive circuit , signal modulation circuit , DSP circuit and display circuit .

OFDM信号调制类型的自动识别研究

Research of Auto-recognition about OFDM Signal Modulation

一种基于高阶矩的OFDM信号调制盲识别算法

Algorithm for Blind Identification of OFDM Signal Based on Higher Order Moments

对CH4气体的测量灵敏度达3.7×10（－9），还介绍了达到这一探测灵敏度的信号调制与探测技术，理论上对该系统的最小可探测压强作了估算。

The minimum detectable pressure of this system is estimated theoretically .

信号调制法测量中性粒子ESD脱附截面

Measurement of Electron-Stimulated - Desorption Cross Section of Neutral Particle by Pulse Modulation

针对数字信号调制模式识别问题，提出了运用高阶累积量和二叉树支持向量机（SVM）进行自动识别的算法。

Applying high order cumulants and support vector machines ( SVM ), an algorithm is proposed for automatic recognition of digital communication signals .

类Haar小波与数字信号调制识别

Modulation Identification of Digital Signals by Constructing Quasi-Haar Wavelet

在简要介绍ANN基本原理和用于模式识别的方法与特点的基础上，把BP神经网络引入到信号调制模式识别。

The basic principles and pattern recognition methods of ANN is analyzed briefly , then the BP neural network is applied to the signal modulation pattern recognition .

基于HOCCs和SVM的单通道时频重叠信号调制识别

Modulation Recognition Based on HOCCs and SVM for Co-Channel Time-Frequency Overlapped Signal

分析了阻尼低频振荡的控制器选择，主要阐明了PSS，TCSC和直流小信号调制的应用场合。

Chapter 3 discuses the selection of damping controllers , especially for PSS , HVDC small signal modulation and TCSC modulation .

仿真了不同原发射调制方式下，MPSK信号调制识别算法的性能。

The paper simulate performance of MPSK signals modulation recognition algorithms under different original transmit modulation type .

自发辐射因子对VCSEL在大信号调制下的分岔及混沌行为的影响

Influence of Spontaneous Emission Factor on the Bifurcation and Chaos Behavior of VCSEL under Large Signal Modulation

通过对通信系统中常用的PSK、FSK、QAM、ASK、FM、AM信号调制方式的仿真，验证了此识别算法的有效性。

The validity of the identification algorithm is verified through simulations of modulation types of PSK , FSK , QAM , ASK , FM , AM which are usually used in communication systems .

进行了FSK，MSK和GMSK调制解调的算法的研究，并在此基础上总结了部分数字信号调制的通用的算法。

It also studies the algorithms of FSK , MSK , GMSK modulation and demodulation mode , and summarizes the general the software modulation and demodulation algorithm .

试验仿真结果表明，HHT方法能克服部分噪声的影响。第二，依据提取出的特征参数作为特征向量，研究人工神经元网络（Artificialneuralnetwork，ANN）单信号调制模式识别问题。

The results of simulation show that the HHT method can overcome some of noises . Secondly , the parameters extracted as the feature vector to recognize the single signal modulation pattern using ANN ( Artificial Neural Network ) is described in the thesis .

针对MPSK信号调制参数估计，首先进行信号载波频率预估计以确定信号小波变换的尺度范围中心。

The carrier frequency have to be estimated to fix on scale 's range of the wavelet transform on studying on modulation parameter estimation of MPSK signals in advance .

在白、高斯信道中宽带MSK最佳检测系统对连续波干扰频率选择性类似于MSK信号调制的谱形状。

The same is true when CW interference with frequency in the wide band optimum detection system bears a good resemblance to that of the spectral density of MSK signal .

xDSL是一种重要的基于现有的铜线环路的宽带接入网技术，而多载波调制是其中采用的一项重要的信号调制技术。

XDSL is an important broadband access network technology based on the existing copper lines , and multicarrier modulation is an important signal modulation technology used in xDSL .

针对调制方式为BFSK的慢跳系统和快跳系统，深入研究了调制识别的方法，利用不同系统的特征，总结了有效的识别方法，降低了跳频信号调制识别的难度。

We study modulation recognition of SFH system , FFH system and summarize the effective recognition methods and reduce the difficulty of identifying FH modulation signal .

提出了一种新的用于骨密度测量的编码方案，它用Chirp信号调制Golay互补码，产生GolayChirp信号，该信号具备了Golay和Chirp共同的优点。

Proposing a new coding scheme for measuring bone mineral density , which uses Chirp signal to modulate Golay signal , so that Golay_Chirp signal is generated . This resulted signal is equipped with advantages of both Golay and Chirp .

最后，在分析小功率量子阱激光器的大信号调制下的调制特性的基础上，研究了可达1W的大功率量子阱激光器的大信号调制特性。

Finally , on the basis of analyzing the modulation characteristics of the low-power quantum well lasers under large signal modulation , the large-signal modulation characteristics of high-power quantum well laser is studied .

针对在DFB-LD/EA集成光源小信号调制响应曲线低频段观察到的异常起伏，测量了DFB-LD的强度噪声谱，比较了不同反向偏压下EA调制器的调制响应。

To explain the peaks observed in the low frequency range of the modulation response of the integrated light sources , we measured the relative intensity noise spectra of the DFB LD and the modulation response of the EA modulator at different reverse biases .

目前，全光波长转换器的研究主要集中在二进制振幅键控（OOK）和差分移相键控（DPSK）信号调制格式，对于偏振移位键控（PolSK）信号调制格式全光波长转换的研究很少。

At present , many researches about all-optical wavelength converters only based on the signal modulation formats of binary amplitude shift keying ( OOK ) and differential phase shift keying ( DPSK ), but it is very few to the signal modulation format of polarization shift keying ( PolSK ) .

为了提高信号调制识别的性能，以信号的六阶和四阶累积量作为识别特征，研究了一种基于高阶累积量的调制识别算法。

A higher order cumulants based modulation classification algorithm is presented .

信号调制法研究电子诱导脱附&基本原理及误差分析

Study of Electron-Stimulated Desorption via Modulation : Principle and Error Analysis

一种有效的BPSK/QPSK信号调制识别方法

An Effective Approach to the Recognition of BPSK / QPSK Signals

对基于决策论的数字信号调制识别方法的改进

Improved method of digital signals modulation identification based on decision theory

分析了信号调制与解调等技术。

It analyzed the related technologies of signal modulation and demodulation .

利用概率估计和支持矢量机的信号调制分类

Digital modulation classification using probability density estimation and support vector machine

基于统计特征主分量的信号调制识别

Modulation Recognition of Signal Based on Statistical Principal Component Feature Parameters