signal modulation

Numerical analysis of the signal modulation effect in bistable stochastic dynamical systems

双稳随机动力系统信号调制噪声效应的数值分析

Secondly, it introduces the frequency selection, EMC ( Electromagnetic Compatibility), the basic generation theory and modulation of the third civil signal ( L5 signal), including LS ranging code, Forward Error Correction, QPSK modulation and Neuman.

其次，介绍了其信号的频段选择、电磁兼容性及其调制和产生的基本原理，包括L5测距码、卷积码、QPSK调制以及Neuman。

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).

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。

Time-Phase Modulation Signal Analysis Based on Cyclic Spectrum Correlation Technology

基于循环谱理论的时相调制信号分析循环计时电势分析法

Focus on the identification algorithm for linear FM signal modulation characteristics.

重点讨论了针对线性调频信号的调制特征识别算法。

The proposed approach combines the function of low phase noise microwave generation and vector signal modulation, develops the application of OEO.

该方案结合了低噪声信号的产生和矢量信号的调制，拓展了OEO的应用。

Simulation of Frequency Response to Small Signal Modulation in Single Quantum Well Laser Diodes

单量子阱激光器小信号频响特性模拟分析

So, the main work in this paper is following: Firstly, starting from Sagnac effect, basic principles of interferometric optical gyro and signal modulation and demodulation scheme are reviewed.

具体工作主要有：首先，从Sagnac效应原理出发，详细阐述了干涉式光学陀螺的信号检测原理，光学陀螺调制解调方法，将开环、闭环检测系统进行了对比。

Study on the Small Signal Modulation Characteristic of Internal-Contact Oxide-Confined Vertical-Cavity Surface-Emitting Lasers

内腔接触氧化限制型垂直腔面发射激光器小信号调制特性研究

It analyzed the related technologies of signal modulation and demodulation.

分析了信号调制与解调等技术。

A method to identify the modulation levels of M-ary Quadrature Amplitude Modulation ( M-QAM) and M-ary Amplitude shift keying ( M-ASK) was developed to rapidly and automatically identify the modulation levels of digitally modulated signals at low signal-to-noise ratios ( SNR).

为了快速自动识别低信噪比下的数字幅度调制进制，提出了一种识别M进制正交幅度调制（M-QAM）和M进制幅度键控（M-ASK）的调制进制的方法。

Analysis and implementation of signal demodulation algorithm for microwave composite signal modulation test system

微波复合调制信号解调算法分析与实现

By controlling the position of the mirror and the beam splitter, it gets three beam, four beam, six beam interference modulation map on the CCD, for image acquisition and signal processing respectively.

用633nm小激光器搭建激光干涉实验系统，通过控制反射镜、分束镜的位置，在CCD上成像得到了三光束、四光束、六光束激光干涉调制图，分别对其进行图像采集和信号处理。

Data Acquisition and Signal Modulation and Demodulation Technique in Gyroscope Survey Instrument

陀螺测斜仪数据采集与信号调制解调技术

A Signal Modulation Method on High Voltage Side of Electronic Current Transformer with Low Power Consumption

电子式电流互感器的一种高压侧低功耗信号调制方法

Automatic identification of the digital modulation type of a signal has found applications in many areas, including electronic warfare, surveillance and threat analysis.

信号的数字调制类型识别在电子战、电子侦察和威胁告警等领域有广泛的应用前景。

The Polarization of Reflected Light and Refracted Light and the Amount of the Polarization; Effects of time period modulation of the noise correlation intensity and bias signal modulation of the noise on stochastic resonance of a single-mode laser

反射光及折射光的偏振状态和偏振度偏置信号调制下噪声关联的周期调制对单模激光随机共振的影响

Research on Test for RFID Signal Modulation Based on Software Radio and Neural Networks

基于软件无线电和神经网络的RFID调制制式测试研究

In modern Sonar equipment the several signal operation modes are usually required, for instance, the keying single frequency signal operation mode, the keying frequency modulation signal operation mode and etc.

在现代声纳中常要求在一部声纳中同时具有几种信号工作方式的功能，例如单频脉冲信号工作方式、键控式调频信号工作方式等等。

From simulation results, the third-order inter-modulation distortion ratio ( IMD3) can be reduced by-10 dB on average when a two-tone signal is input. Finally, the bias-controlled predistorter has been used in OFDM system.

从仿真结果可以总结出，当系统采用双音信号作为输入时，功率放大器输出的三阶互调失真可以平均减少10dB。最后，将二极管偏压控制预失真器应用于OFDM系统中。

That is mixing the baseband signal ( linear frequency modulation signal and sinusoid signal) with two orthogonal local oscillated signal generated using direct digital synthetic technology to move the baseband signal to intermediate frequency band.

同样运用直接数字合成技术产生基带信号&线性调频信号和正弦信号，与本地载波混频后，将其频谱搬移到中频，完成数字上变频。

In the case of the noises modulated by the bias signal, the stochastic resonance of a single-mode laser driven by two colored noises with time period modulation correlation intensity is investigated.

在噪声受偏置信号调制的情况下，讨论色噪声之间的关联受时间周期调制所驱动的单模激光系统中的随机共振。