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产生15种模拟及数字调制信号函数。参数说明:type-调制信号种类,total_time-信号总时间长度,fc-载频,fs-抽样频率,symbol_rate-符号率-have 15 analog and digital modulation signal function. Parameter Descr iption : type-modulated signal types,'04-Signal total time length, fc-carrier frequency, fs-
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各种模拟调制和数字调制的波形和频谱图,对初学者很有帮助-A variety of analog modulation and digital modulation waveform and frequency spectrum
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这是我们现代通信原理课程设计时所写的一个关于模拟信号的调频(FM)、双边带调幅(DSB)程序,里面还有详细的报告。-This is our modern communication principles course design of a written about analog signals (FM), the frequency modulation (DSB) with bilateral program, with detailed report.
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模拟信号的数字化传输---增量调制系统
用SIMULINK建立简单增量调制系统的模型并进行
(3) 正弦信号
(4) 语音信号
的传输。
改变抽样频率和量化台阶大小,观察重建信号以及量化噪声信号的波形;对于语音信号主观评价声音质量的变化。
-Digitized analog signal transmission systems--- delta modulation delta modulation SIMULINK easy set up of the model s
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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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Title : Implementation of quadrature modulation and demodulation
Design Object : By implementing quadrature modulation and demodulation of analog signals in digital signal processing, students will have better understanding of sampling and frequenc
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AD9954是美国AD公司采用先进的DDS技术生产的高集成度频率合成器,它能产生200MHz的模拟正弦波。文章介绍了AD9954的基本特点和引脚功能,分析了其内部结构和工作原理,给出了AD9954在高速调制信号系统中的应用方案。-AD9954 is AD using advanced DDS technology to produce a high level of integration of the frequency synthesizer that can generate the an
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电路中使用了锁相环音频译码器LM567。LM567是一种模拟与数字电路组合器件,其电路内部有一个矩形波发生器,矩形波的频率由5、6脚外接的R、C值决定。输入信号从3脚进入LM567后,与内部矩形波进行比较,若信号相位一致,则8脚输出低电平,否则输出高电平。8脚是集电极开路输出,使用时必须外接上拉电阻。
将LM567第5脚上幅值约为4V的标准矩形波,通过R1引至三极管VT1的基极,使接在VT1发射极的红外线发射管导通并向周围空间发出调制红外光。-PLL circuit used in the
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构建OFDM调制的数字电视信号DVB-T,得到其时域、频谱图,并对其上变频,模拟其发射!-Construction of OFDM modulation digital television signals DVB-T, by the time domain, frequency spectrum, and its up-conversion, analog of its launch!
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模拟调制:幅度调制中的双边带幅度调制的时域表示式和频谱,及代码实现
-Analog modulation: amplitude modulation with amplitude modulation in bilateral expression in time domain and frequency spectrum, and code implementation
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该高频正弦信号发生器基于直接数字频率合成(DDS)和数字锁相环技术(DPLL),以微控制器(MCU)和现场可编程逻辑门阵列(FPGA)为核心,辅以必要的外围电路设计而成。系统主要由正弦信号发生、红外遥控、高速模数(A/D)-数模(D/A)转换、信号调制和后级处理等模块组成。-The high-frequency sinusoidal signal generator based on Direct Digital Synthesis (DDS) and digital PLL (DPLL), a
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对噪声抵抗能力的增强是PWM相对于模拟控制的另外一个优点,而且这也是在某些时候将PWM用于通信的主要原因。从模拟信号转向PWM可以极大地延长通信距离。在接收端,通过适当的RC或LC网络可以滤除调制高频方波并将信号还原为模拟形式。 -Noise resistance to increasing ability of the PWM is relative to the simulation control another advantage of, and this also is in some
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模拟通信系统中,幅度调制及频率调制的代码,调制与解调,应用matlab实现。-Analog communication systems, amplitude modulation and frequency modulation code, modulation and demodulation, the application of matlab.
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Analog Frequency Modulation
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模拟线性调制系统的调制和解调原理,编写AM、DSB、SSB调制,并画出时域波形和频谱图-Analog modulation and demodulation principle of linear modulation systems, the preparation of AM, DSB, SSB modulation, and draw time-domain waveform and frequency spec
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Modulation of FSK:
Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier wave. The simplest FSK is binary FSK (BFSK). BFSK literally implies using a
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信号分析与识别仿真,采用GUI界面,包括数字和模拟信号的调制、解调及分析,可估计信号的频率、带宽等参数-Signal analysis and recognition simulation, USES the GUI interface, including digital and analog signal modulation and demodulation and analysis, can be estimated parameters such as frequency, bandw
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基于MATLAB的模拟信号频率调制(FM)与解调分析-MATLAB-based analog frequency modulation (FM) and demodulation
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The frequency modulation scheme
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利用matlab编写连续信号的相位调制和频率调制-Matlab in the analog signal phase modulation, frequency modulation and so on
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