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这个VC程序可用来产生贝塞尔函数表,可用在高频的调制解调上,可以通过查相应的表来得知调相信号中调制度的大小-the VC program can be used to generate tables of Bessel functions, can be used in high-frequency modulation and demodulation. can check to the corresponding table was informed Phase signal transfe
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matlab,线性调频信号,脉冲压缩,雷达信号仿真,matlab, linear frequency modulated signal, pulse compression, radar signal simulation
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利用MATLAB实现了跳频信号的调制和解调,给出了频谱图。,The use of MATLAB implementation of the frequency hopping signal modulation and demodulation, give the frequency spectrum.
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信号发生器,可输出三角波,方波,锯齿波,可调频调幅-Signal generator output triangle wave, square wave, sawtooth wave, frequency modulation amplitude modulation can be
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,用MATLAB实现快跳频通信系统的仿真。主要应用了SIMULINK和COMMUNICATION BLOCKETS两个模块。整个设计包括了信源产生部分、发送部分、跳频调制部分、信道部分、接收部分和结果分析部分共六个模块,核心技术是伪随机序列的产生和频率合成器的设计,而关键技术是收发两端的伪随机码元的同步。伪随机码的产生用S-函数编程来开发自己的SIMULINK模块。同步的实现是收发两端采用相同的扩频脉冲触发。而且在设计中每个模块都采用了模块封装技术,从而简化了框图结构-Using MATLAB
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.FSK、PSK、ASK调制原理 在数字通信系统中,数字基带信号通常要经过数字调制后再传输。常见的调制方式有频移键控(FSK)、相移键控(PSK)、幅移键控(ASK)-. FSK, PSK, ASK modulation principle in digital communication systems, digital baseband signal is usually subject to digital modulation and then transmitted. Common m
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以转差频率矢量控制的基本原理和概念为基础,利用matlab simulink构建仿真模型并进行仿真。仿真的结果表明采用转差频率控制的矢量控制系统具有良好的控制性能。-To slip frequency vector control of the basic principles and concepts based on the use of matlab simulink simulation model and to build a simulation. Simulation result
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设计卫星信道条件下,用于调制方式识别的载频和带宽识别算法。-Satellite channels under the conditions of the design for the identification of modulation carrier frequency and bandwidth of the recognition algorithm.
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包括信号的调制与解调,经MATLAB仿真,其性能良好。-Including the signal modulation and demodulation, by the MATLAB simulation, its performance is good.
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简单实用的扩频系统MATLAB源程序,包括直接序列,调频和CDMA-Spread-spectrum systems simple and practical MATLAB source, including direct sequence, frequency modulation and CDMA
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频率调制,属于角度调制中主要一种,相位调制可以通过对信号先微分再调频获得-Frequency modulation, angle modulation in the main belong to a kind of phase modulation of the signal can be differential access to re-FM
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DIGITAL MODULATION TECHNIQUES
the material describes digital modulation techniques such as BINARY PHASE SHIFT KEYING (BPSK), DIFFERENTIAL PSK (DPSK), DIFFERENTIALLY-ENCODED PSK (DEPSK), QUADRATURE PSK (QPSK), QUADRATURE AMPLITUDE SHIFT KEYING (Q-AS
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振幅调制,角度调制,频率调制等几个源程序,模拟通信系统-Amplitude modulation, angle modulation, frequency modulation, such as source code, analog communication systems
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二用户CDMA系统,信道为加性高斯信道,使用BPSK调制,15位M序列扩频,可以正确解扩解调。
输出为2用户的基带信号、扩频信号、PSK调制信号、解调信号的时域和频域特性,给出两个用户分别的误码率。 -Second, the user CDMA system, channel for the additive Gaussian channel, using BPSK modulation, 15 M Sequence Spread Spectrum, you can correct demo
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数字信号调制中的幅度调制、频率调制、相位调制等例程。-Digital signal modulation of the amplitude modulation, frequency modulation, phase modulation, such as routines.
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调频扩频,差分跳频技术是近年出现的一种新型扩频通信技术,他集跳频图案、信息调制与解调等功能于一体,构成与传统跳频技术完全不同的技术体制。对近年出现的扩频通信新技术——差分跳频技术进行了全面介绍。在对差分跳频关键技术进行详细分析的基础上,着重说明其优点及尚需解决的问题。-Spread Spectrum Frequency Modulation
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雷达测伪距 采用的正负调频法 matlab仿真源码 -The radar measured pseudorange positive and negative frequency modulation method matlab simulation source code
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AD9850/AD9851模块是采用ADI应用最广泛的DDS(AD9850和AD9851)制作的模块。ADI的性能就不用多说了。模块主要参考AD9850和AD9851的资料做的。
主要功能特点:
* 模块能够输出正弦波和方波,2个正弦波和2个方波输出。
AD9850: 0-40MHz
AD9851: 0-70MHz
频率在20-30MHz后谐波越来越大,波形会越来越不干净。
方波: 0-1MHz
* 采用70MHz的低通滤波器,使波形的SN比更好
* 并口
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FREQUENCY MODULATION
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雷达测伪距 采用的正负调频法 matlab仿真源码 -The radar measured pseudorange positive and negative frequency modulation method matlab simulation source code
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