数字调制

基于DSP的软件无线电的数字调制技术研究与实现

The Research and Realization on Digital Modulation of Software Radio Based on DSP Technology

OFDM技术是一种适用于宽带系统的多载波数字调制技术。

OFDM is a multi-carrier digital modulation technique suitable for broadband systems .

伪码对N倍钟码数字调制后的自相关函数与功率谱

Autocorrelation functions and power spectrums of PN code-digitally-modulated n-times clock codes

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

基于DSPBUILDER的多种数字调制的实现

Realization of Digital Modulation Based on DSP Builder

提出了一种基于DSP芯片实现的双频率数字调制谐振式光纤陀螺系统的闭环检测方案。

A closed-loop digital detection system in resonant fiber gyro by two frequencies modulation based on DSP chip is proposed .

本文利用MATLAB和SYSTEMVIEW对选用的π/4QPSK数字调制解调算法和整个数字调制解调系统进行了仿真验证。

The π / 4QPSK . digital modulation and demodulation algorithm and the digital modulation and demodulation system were simulated and validated using the software MATLAB and System View .

PN码数字调制波的功率谱分析

Power Spectrum Analysis of PN Code Digitally Modulated Waves

PWM在几种模拟通信信号数字调制解调中的应用

The application of PWM in digital modulation and demodulation for analog communication signals in several modulation modes

基于DDS的可变数字调制制式的应用研究

The application of alterable digital modulation base on DDS

HFC宽带接入网中数字调制技术的研究

Research of Digital Modulation Technologies in HFC Broadband Access Network

HFC网络中模拟调制信号与数字调制信号的相互影响

Interrelation between Analog Modulation Signal and Digital Modulation Signal on HFC Networks

数字调制解调技术是3G移动通信系统中空中接口标准的重要组成部分。

Digital modulation and demodulation techniques are important parts of air interface standards in 3G mobile communication systems .

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 .

DDS在数字调制系统中的应用

Application of DDS in Digital Modulation

基于FPGA+DDS的MSK数字调制源设计

Design of the Digital Modulator of MSK Based on FPGA + DDS

应用高阶统计量和RBF神经网络原理，针对数字调制通信信号提出了一种基于统计模式识别理论的信号调制类型识别新方法。

A new efficient method based on statistical pattern recognition theory to recognition digital modulation types of commu - nication signals is proposed .

数字调制解调技术在数字通信中占有非常重要的地位，数字通信技术与FPGA的结合是现代通信系统发展的一个必然趋势。

Technology of digital modulation and demodulation plays a important role in digital communication system , the combination of digital communication technology and FPGA is a certainly trend .

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 .

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

并给出了该算法的一个应用实例&从噪声中识别数字调制信号，能够对ASK、FSK、PSK等信号的调制类型进行识别，改善了信号识别的性能。

An application to identify digital modulation signals from noise is presented , the identification performance can be improved by this algorithm .

对于双频率数字调制的谐振式光纤陀螺，该文提出了两种基于数字信号处理芯片（DSP）实现的闭环检测方案，并利用Matlab软件对两种检测方案进行了全面的比较。

This paper proposes two methods of closed-loop detection based on DSP for resonator fiber optic gyroscopes using two frequencies modulation , and makes a comparision between two methods by Matlab .

GMSK数字调制的仿真与分析

The Emulation and Analysis of GMSK Digital Modulation

移动信道GMSK窄带数字调制解调系统

Narrow-band Digital Modem of GMSK in Mobile Channels

基于数字调制信号的特征直方参量分析，提出了采用BP和RBF两类网络进行数字信号调制识别的方法，并对其识别性能进行了对比分析，数值模拟结果证实了提出方法的有效性。

BP and RBF pattern recognition approach for digital modulation signals based on the statistical parameters histogram distribution are presented , the performance of BP or RBF is analyzed .

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 .

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 .

根据相关资料，建立了一个信道模型，根据模型求得了低频弹性波信道OFDM调制技术的相关参数，并选定了相应的数字调制方式。

The related parameters of OFDM modulation technology for low-frequency elastic wave channel is obtained according to the model , meanwhile , the corresponding digital modulation mode is selected .