AM(Amplitude Modulation)调制是一种常见的模拟调制技术,通过改变载波信号的幅度来传输基带信号。在AM调制中,基带信号被乘以一个高频载波信号,产生一个带有两个边带的调制信号。这两个边带位于载波频率的上下方。 FM(Frequency Modulation)调制是一种模拟调制技术,通过改变载波信号的频率来传输基带信号。在FM调制中,基带...
Pulse modulation (pam, pwm) 0 답변 DVB-RCS or DVB-RCS2 0 답변 전체 웹사이트 Flat Top Pulse Amplitude Modulation (PAM) File Exchange Pulse Code Modulation File Exchange Orthogonal Designs With Maximal Rates File Exchange 카테고리 Wireless Communications Communicati...
For Amplitude Modulation, it suppose to have carrier amplitude and modulated amplitude. however, the matlab built in function which is ammod, i cannot find which is carrier amplitude. https://uk.mathworks.com/help/comm/ref/ammod.html y = ammod(x,Fc,Fs,ini_phase) ...
Compare Double-Sideband and Single-Sideband Amplitude Modulation Copy Code Copy Command Set the sample rate to 100 Hz. Create a time vector 100 seconds long. Get fs = 100; t = (0:1/fs:100)'; Set the carrier frequency to 10 Hz. Generate a sinusoidal signal. Get fc = 10; x = ...
%AM Modulation y = Ac*(A0 + Ka*ym).*yc; subplot(3,2,5); plot(t,y); title ( 'Amplitude Modulated signal'); [YfreqDomain,frequencyRange] = centeredFFT(y,Fs); subplot(3,2,6) stem(frequencyRange,abs(YfreqDomain)); 满调制的效果如下: ...
正交幅度调制,又称为正交振幅键控,QAM(Quadrature Amplitude Modulation)。 多进制正交调幅MQAM,是一种既调幅又调相的数字调制,用载波的不同幅度及不同相位来表示多进制数字信息。 一、正交幅度调制(QAM)的产生 QAM信号使用两个正交载波cos(2πfct)和sin(2πfct),其中每个都被一个独立的信息比特序列所调制。波形...
一、简介二、源代码function varargout = amplitude(varargin)% AMPLITUDE MATLAB code for amplitude.fig% AMPLITUDE, by itself, creates a new AMPLITUDE or raises the existing% singleton*.%% H = AMPLITUDE returns the handle to a new AMPLITUDE or the ide 自适应 软件平台 sed 登录页面 【毕业设计系列...
Pulse amplitude modulation (PAM) collapse all in page Syntax y = pammod(x,M) y = pammod(x,M,initphase) y = pammod(x,M,initphase,symorder) Description y= pammod(x,M)returns the complex envelope of the modulation of the input message signal,x, using PAM and the alphabet size,M....
64QAM(Quadrature Amplitude Modulation,相正交振幅调制),在使用同轴电缆的网络中,这种数字频率调制技术通常用于发送下行数据。64QAM在一个6MHz信道中,64QAM传输速率很高,最高可以支持38.015Mbps的峰值传输速率。但是,对干扰信号很敏感,使得它很难适应嘈杂的上行传输(从电缆用户到因特网)。参见QPSK, DQPSK, CDMA, S-CDMA...
Amplitude modulation (AM) is a linear baseband modulation technique in which the message modulates the amplitude of a constant frequency signal. Communications Toolbox™ software includes these modulation and demodulation functions, System objects, and blocks to model pulse amplitude modulation (PAM) an...