调制信号

本文采用了数字频率合成技术（DDS）来产生调制信号，它具有超宽的频率带宽、超高的频率分辨率和相位连续性等特点，可以实现声光调制信号的频率和振幅的高稳定性。

The modulating signal is generated in the way of Direct Digital Synthesizer technology .

窄带调相信号通过R倍分频器后，调制信号功率将下降。

When a narrow band phase modulated signal is passed through a frequency divider with division ratio R , the power of the modulating signal is reduced .

基于BP神经网络的数字调制信号样式自动识别

Automatic Identification of the Digital Signals Modulation Based on the BP Neural Network

数字调制信号开环解调的DSP实现

The DSP implementation of all-digital demodulation

采用一根载波线传输调制信号，替代传统CO2焊机的六根信号线。

It used a carrier-modulated signal transmission line to replace the traditional six-core cable .

详细论述了基于DSP和CPLD的数字调制信号的识别和解调过程。

This paper discusses the process of digital modulation signals detection and demodulation , which base on DSP and CPLD .

本文给出了调频指数和调相指数的统一定义式，并在此基础上，得出了β，W与调制信号参数的关系。图文电视解码器调试及误码率分析

The paper gives a unified definition of the modulation coefficient . The Modulation of Teletext Decoder and the Analysis of the Coefficient of Error Code

介绍了一种适用于二相相移键控（BPSK）扩频调制信号的数字式处理方法。

This paper proposes a novel digital IF processing method of BPSK signal .

MSK调制信号的数字化解调的实现。

Realization of MSK modulated signals ' digital demodulation .

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 .

数字调制信号分三种基本类型：多进制幅度键控MASK、多进制相移键控MPSK和多进制频移键控MFSK。

There are three basic types of digitally modulated signal : MASK , MPSK and MFSK .

介绍了BOC调制信号的频谱、功率谱和相关函数的特点。

This paper introduces the spectrum , power spectrum and the autocorrelation of BOC modulation ;

非理想传输通道对数字调制信号EVM的影响&理论、仿真和测量

EVM caused by non ideal transmission channel-theory , simulation and measurement

仿真并比较了OFDM调制信号激励下功放的非线性指标，最后结合实际所做的某OFDM系统中的射频硬件系统作了对比。

The nonlinearity specifications of power amplifier excited by OFDM modulated signal are simulated and compared in contrast to the practical OFDM radio frequency hardware system .

在通讯中调幅调频（AM/FM）信号和其他相位调制信号均可以通过对信号的相位做多项式展开，利用有限阶的多项式相位信号（Polynomialphasesignal，PPS）来近似逼近。

In communications , AM / FM signal and other Phase-Modulated signals can be expanded to the high polynomial phase signal ( PPS ) and be approximated by finite order PPS .

为了实现GMSK信号解调，接收机中DSP实现了调制信号的误差频谱估计、位同步恢复及译码。

To demodulate GMSK signal , DSP is used in receiver to achieve error spectrum estimation , bit synchronization recovery and decode .

BPSK调制信号中的幅度调制现象分析

Analysis of AM Phenomenon in BPSK Signal

本文采用陷波、数字相敏检波、基于多分辨率分析的硬阈值去噪算法和FFT、频率校正等算法，估计出回波信号中调制信号的主频。

Algorithms such as notch filtering , digital phase detection , denoising with hard threshold based on multiresolution analysis , FFT , and rectifying frequency etc.

基于PCI总线的2FSK调制信号检测方法

FSK Modulation Signal Detection Method Based on PCI Bus

利用Saber仿真的傅里叶分析，选择出最佳的低频调制信号范围。

The best range of modulate frequency is chosen by Fourier analysis of Saber simulation .

最后讨论了采用DSP芯片实现DQPSK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 .

GMSK调制信号的仿真

The simulation of GMSK modulation signal

分析了各部分的电路结构及特点，讨论了PWM脉宽调制信号生成、逻辑信号综合、驱动控制及电流截止负反馈的具体应用，在此基础上给出了实验数据及结果分析。

It analyses some main circuits 's features , including PWM signals , logic synthesis , driver and negative feedback of current cut-off and at last gives the result of experiment .

行波电极（Travelingwaveelectrode，TW），是目前广泛采用的一种电极结构，可缩短光载波与调制信号的互作用长度，可有效避免分布电容（Contributioncapacity，CR）对调制带宽的限制。

Traveling wave ( TW ) electrode structure is widely used for it needs less multi-action length between optical carrier and digital modulation and can get rid of contribution capacity 's constraints on modulation bandwidth .

各个子系统与主监测器采用FSK音频调制信号一对一通信。

Adopted the one to one communication of FSK audio frequency modulating signal in the communication of every subsystem and host monitor .

IJF-OQPSK调制信号的检测及其误码率性能

Detection of IJF-OQPSK modulated signals and its performance of bit-error rate

一种突发通信的IJF-OQPSK调制信号解调方法

A Demodulation Approach of IJF-OQPSK Signal for the Burst Communication System

本文介绍了一个简单实用的信号转换变送电路，即如何将来自单片机的脉宽调制信号PWM转换变送为工业标准的电流信号（4-20mA）。

A simple and practical signal conversion electric circuit is introduced in this paper , which can convers the PWM signal from single-chip microcomputer to industrial standard current signal ( 4 ~ 20mA ) .

针对某低频水平振动校准设备的激光干涉仪，利用NI公司的多功能采集卡，采集激光干涉仪的调制信号及与其同相位的电容式位移传感器的输出信号。

In this paper , aimed to a laser interferometer of a low frequency vibration calibrated device , its modulated signal and the capacitance displacement transducer signal are collected together through multifunction I / O board .

MATLAB仿真分析表明，与单纯线性调频信号相比，该混合调制信号产生和处理简单，既保持了线性调频信号的优点，又提高了抗截获和抗干扰能力。

Through the analysis and MATLAB simulation of anti-jamming , it has been proved that this co-modulated signal has the advantages of higher ability for anti-interception and anti-jamming , and the co-modulated signal can be easy generated and processed .