PAM(Pulse Amplitude Modulation,脉冲振幅调制)是一种模拟信号到数字信号的转换方式,它通过改变脉冲的振幅来表示信息。在PAM调制中,信息位(bit)被转换成一个具有特定振幅的脉冲。本文首先对PAM进行介绍,然后给出一个PAM调制解调通信系统的MATLAB仿真。最后给出了仿真结果。
数字信号是对连续变化的模拟信号进行抽样、量化和编码产生的,称为PCM(Pulse Code Modulation),即脉冲编码调制。 脉冲编码调制就是把一个时间连续,取值连续的模拟信号变换成时间离散,取值离散的数字信号后在信道中传输。脉冲编码调制就是对模拟信号先抽样,再对样值幅度量化,编码的过程。 抽样,就是对模拟信号进行周期性...
Matlab__Simulink for Digital Communication CHAPTER4AD(Analog-to-Digital)Conversion CHAPTEROUTLINE 4.1Quantization4.1.1UniformQuantization4.1.2Non-uniformQuantization4.2PulseCodeModulation(PCM)4.2.1UniformPCM4.2.2Non-uniformPCM4.3DifferentialPulseCodeModulation(DPCM)4.4DeltaModulation(DM)Mostinformation...
Through the emulatation’s analysing for these pulse code modulation( PCM) of systematic principle, it will have a great value of application for teaching in the future. Keywords: Pulse coding modulation ( PCM); Simulink emulates ;Quantizing error 目 录 TOC \o 1-3 \h \z \u 第一章 ...
The most common strategy for controlling the power transmitted to the load is the intersective Pulse Width Modulation (PWM). A control voltage vm is compared to a triangular voltage vt. The triangular voltage vt determines the switching frequency ft. The switch T is controlled according to the ...
isaftersamplingtheinstantaneousvalueoftheamplitudeofdiscrete,whichUSESasetofrulesoflevel,theinstantaneoussamplingvalueofthemostclosetothelevelofvalue.Ananalogsignalaftersamplingquantizationhasquantitativepulseamplitudemodulationsignal,itisonlyafinitenumberofvalues.Coding,whichisexpressedinagroupofbinarycodegroupeachhavea...
%%demo of chirp signal after matched filter T=10e-6; %pulse duration10us B=30e6; %chirp frequency modulation bandwidth 30MHz K=B/T; %chirp slope Fs=10*B;Ts=1/Fs; %sampling frequency and sample spacing N=T/Ts; t=linspace(-T/2,T/2,N); St=exp(j*pi*K*t.^2); %chirp ...
Matlab-pulse generator-讲解 查看原文 电力电子技术1:单相半波电路电阻负载simulink仿真,详解 library b’rowser库,打开 二、拖入相应元器件 如图 三、设置相关参数交流电压源 peakamplitude:电压幅值phase:初始相位角frequency:频率 sample time:采样时间设置触发脉冲amplitude:触发脉冲幅值period:触发周期(与电流源保持...
1.2PCM介绍PCM全称为:PulseCodeModulation,中文名为脉冲编码调制。是一种模拟信号的数字化方法。PCM信号是模拟信号经过抽样、量化、编码三个步骤而产生的。抽样,就是按照一定的规律从模拟信号中获取一定数量的取样信号。通常按照抽样定理确定抽样频率fs,即抽样频率fs应不小于信号最大频率量化,就是把抽取出来的取样信号按...