Digital modulation ask fsk psk code#

There is no difference between the OOK and ASK waves b. Select the correct statement regarding the modulated ASK waveform.

Digital modulation ask fsk psk code#

%ASK clear clc clf Ac=3 %amplitude of the carrier fc=5 %frequency of the carrier data= a1=4.5 %simple line code amplitude 1 a2=0.5 %simple line coded amplitude 2 blc2=1:8 %replace data with line coded voltage n = length(data) %number of data bits t = 0.01:n %time x-axis x = 1:1:(n+1)*100 %'for j' matrix statement, populate matrix dat2 for m=1:n %replace logical data with voltage line coding if data(m)>0 Index=data(m)/Ac %ASK index blc2(m)=a1 else blc2(m)=a2 end end for i = 1:n %expand line coded volatges by x10 for j = i.1:i+1 dat2(x(i*100:(i+1)*100)) = blc2(i) %populate line code matrix by expanding x10 end end dat2 = dat2(100:end) cosine=cos(2*pi*fc*t) c = Ac*cos(2*pi*fc*t) %carrier wave st = (Ac + dat2).*cosine %ASK modulated signal subplot(4,1,1) plot(t,dat2)%plot line coded data title('Simple Line Coded Data') grid on axis() subplot(4,1,2) plot(t,c) %plot carrier wave title('Carrier Wave') grid on axis() subplot(4,1,3) plot(t,st) %plot ASK modulated signal title('ASK Modulated Signal') grid on 3 axis() %combined modulated carrier and line coded data plot subplot(4, 1, 4) yyaxis left plot(t, st) ylim() yyaxis right plot(t, dat2) ylim() title('Combined Line Coded Data and ASK Modulated Carrier') xlabel('time') ylabel('amplitude') Question 2.

ASK Digital Modulation Logical Data Set: data = Simple Line Code Voltages: a1 volts representing logical “1” 2 a2 volts representing logical “0” Carrier: c(t) = Ac cos(2πfct), c=Ac*cos(2*pi*fc*t) Index: Index=data(m)/Ac Step 2.1 Use the following MATLAB code and create plots. False Plot 1 - OOK Signal Plot Submission: Submit (i.e., copy/paste) the MATLAB plots from step 1.1 above into the “IT300 Virtual Lab Plot Submission”. The OOK modulated signal does not accurately represents the logical data. %OOK clear clc clf Ac=3 %amplitude of the carrier fc=5 %frequency of the carrier data= a1=1 %simple line code amplitude 1 a2=0 %simple line coded amplitude 2 blc2=1:8 %replace data with line coded voltage n = length(data) %number of data bits t = 0.01:n %time x-axis x = 1:1:(n+1)*100 %'for j' matrix statement, populate matrix dat2 for m=1:n %replace logical data with voltage line coding if data(m)>0 Index=data(m)/Ac %ASK index blc2(m)=a1 else blc2(m)=a2 1 end end for i = 1:n %expand line coded volatges by x10 for j = i.1:i+1 dat2(x(i*100:(i+1)*100)) = blc2(i) %populate line code matrix by expanding x10 end end dat2 = dat2(100:end) cosine=cos(2*pi*fc*t) c = Ac*cos(2*pi*fc*t) %carrier wave st = (Ac*dat2).*cosine %OOK modulated signal subplot(4,1,1) plot(t,dat2)%plot line coded data title('Simple Line Coded Data') grid on axis() subplot(4,1,2) plot(t,c) %plot carrier wave title('Carrier Wave') grid on axis() subplot(4,1,3) plot(t,st) %plot OOK modulated signal title('OOK Modulated Signal') grid on axis() %combined modulated carrier and line coded data plot subplot(4, 1, 4) yyaxis left plot(t, st) ylim() yyaxis right plot(t, dat2) ylim() title('Combined Line Coded Data and OOK Modulated Carrier') xlabel('time') ylabel('amplitude') Question 1. OOK (On Off Keying) Digital Modulation Logical Data Set data = Simple Line Code Voltages a1 volts representing logical “1” a2 volts representing logical “0” Carrier: c(t) = Ac cos(2πfct), c=Ac*cos(2*pi*fc*t) Step 1.1 Use the following MATLAB code and create plots using the following code. Note: In this lab (VLAB3) no MatLab code modification is necessary. Students are highly encouraged to change the values of variables during each part of the lab in order to observe changes in the signal plots. A document “plot submission” template will be available for you to paste requested copies for submission into the VLAB assignment. These will also be identified by blue text within the procedures. In addition, you will be asked to copy and submit plots that you create using MatLab. The question format is similar to that of a homework assignment (i.e., select the correct answers and submit). You are required to answer these questions in a separate VLAB assignment which will appear in the VLAB folder. As you read through this procedure, you will find multiple choice questions appearing in blue text. VLAB3 covers part 1: On-Off Keying (OOK), part 2: Amplitude Shift Keying (ASK), part 3: Frequency Shift Keying (FSK), and part 4: Phase Shift Keying (PSK) digital signaling techniques. IT300 Virtual Lab 3 V5 ASK, FSK and PSK Digital Modulation Student Name: _ GMU ID: _Date: _ Objectives. Matlab ASK FSK and PSK Digital Modulation Lab Report