1. Introduction to MATLAB

2. BACKGROUND MATLAB, which stands for MATrix LABoratory, is asoftware package developed by MathWorks. This software package was used initially for numericalcomputations as well as some symbolic manipulation. The collection of programs (primarily in Fortran) thateventually became MATLAB were developed in the late1970s by Cleve Moler, who used them in a numericalanalysis course he was teaching at the University of NewMexico. Jack Little and Steve Bangert later reprogrammed theseroutines in C, and added M-files, toolboxes, and morepowerful graphics (original versions created plots byprinting asterisks on the screen). Moler, Little, and Bangert founded MathWorks inCalifornia in 1984. If we get a job in a particular field of engineering ,university or industry we will mostly used specializedsoftware. 3. Why MATLAB ? Ease of Use User Friendly Platform Independence Predefined Functions Device-Independent Plotting Graphical User interface MATLAB CompilerWhy not MATLAB Has some drawbacks: Slow for some kinds of processes Cost effective 4. Introduction What Is MATLAB? MATLAB (MATrix LABoratory) Flexibility to solve a large number ofproblems High-level technical computinglanguage and interactive environment high-performance language for technicalcomputing Good Tool for visualization Computation and programming is aneasy-to-use environment Has computational and graphical tools Handles real and complex scalars,vectors and matrices Script Language is relatively easy to learn 5. Introduction Typical uses include: Simple calculation Plotting and analyzing mathematicalrelationships (2D and 3D) List and Matrix operations Writing script files (a type of Programming) Symbolic manipulation of Equations Mathematical Computations Algorithm development Modelling, simulation, and prototyping Data analysis, exploration, and visualization Scientific and engineering graphics Application development, including Graphical UserInterface building 6. MATLAB Worldwide Aerospace and Defense Automotive Biotech, Medical, andPharmaceutical Chemical and Petroleum Communications Computers and Office Equipment Education Electronics and Semiconductor Financial Services Industrial Equipment andMachinery Instrumentation Utilities and Energy 7. Introduction to some basicmatrix operators andother tools Some important matrix operations Introduction to some operators Introduction to M-file editor Editing and debugging M-files Basic plotting functions Creating plot Editing plot 8 8. Basic Matlab Operations >> % This is a comment, it starts with a % >> y = 5*3 + 2^2;% simple arithmetic >> x = [1 2 4 5 6]; % create the vector x >> x1 = x.^2; % square each element in x >> E = sum(abs(x).^2); % Calculate signal energy >> P = E/length(x); % Calculate av signal power >> x2 = x(1:3);% Select first 3 elements in x 9. 2D & 3DGraphics 10. Introduction The MATLAB environment provides a wide variety oftechniques to display data graphically. Interactive tools enable you to manipulate graphs toachieve results that reveal the most information about yourdata. You can also annotate and print graphs for presentations,or export graphs to standard graphics formats forpresentation in Web browsers or other media.11 11. Creating a Graph The type of graph you choose to create depends on the nature ofyour data and what you want to reveal about the data. You can choose from many predefined graph types, such as line,bar, histogram, and pie graphs as well as 3-D graphs, such assurfaces, slice planes, and streamlines. There are two basic ways to create MATLAB graphs: Use the command interface to enter commands in the Command Window or create plotting programs.Use plotting tools to create graphs interactively. 12. 2d graphsTypes of MATLAB Plots 2D 13. 3d GraphsTypes of MATLAB Plots 3D 14. NASA ELECTRON BEAM WELDER 15. Matlab Simulink 16. Simulink Introduction Simulink software models, simulates, and analyzesdynamic systems. It enables us to pose a question about a system, modelthe system, and see what happens. With Simulink, we can easily build models from scratch,or modify existing models to meet your needs. Simulink supports linear and nonlinear systems,modeled in continuous time, sampled time, or a hybridof the two. Systems can also be multirate having different parts thatare sampled or updated at different rates. 17. Simulink Thousands of scientists and engineers around the world useSimulink to model and solve real problems in a variety ofindustries, including: Aerospace and Defense Automotive Communications Electronics and Signal Processing Medical Instrumentation 18. Starting and RunningSimulink Type the following at the Matlabcommand prompt >> simulink The Simulink library should appear Click File-New to create a newworkspace, and drag and drop objectsfrom the library onto the workspace. Selecting Simulation-Start from thepull down menu will run the dynamicsimulation. Click on the blocks toview the data or alter the run-timeparameters 19. Signals and Systems inSimulink Two main sets of libraries for buildingsimple simulations in Simulink: Signals: Sources and Sinks Systems: Continuous and Discrete 20. Basic Simulink Example Copy sine wave source and scopesink onto a new Simulink work spaceand connect. Set sine wave parameters modify to 2rad/sec Run the simulation:Simulation - Start Open the scope and leave open whileyou change parameters (sin orsimulation parameters) and re-run Many other Simulink demos 21. Modeling Jaguar 22. CommunicationToolbox 23. PresentationOutline Section Overview Expected background from the Users Studying Components of the Communication System BER : As performance evaluation Technique Scatter Plot Simulating a Communication Link.Examples BERTool : A Bit Error Rate GUI 24. Studying Components ofCommunication systemWe will See for two Types: Analog Communications Digital Communications 25. Analog CommunicationSystemSignalDe-ModulationSourceModulation This may be any analog signal such as Sine wave, Cosine Wave, Triangle Wave.. 26. AnalogModulation/DemodulationFunctionsammodAmplitude modulationamdemodAmplitude demodulationfmmodFrequency modulationfmdemodFrequency demodulationpmmodPhase modulationpmdemodPhase demodulationssbmod Single sideband amplitude Modssbdemod Single sideband amplitude DeMod 27. Image ProcessingToolbox 28. Images in MATLAB Binary images :{0,1} Intensity images : [0,1] or uint8, double etc. RGB images : m-by-n-by-3 Indexed images : m-by-3 color map 29. Images and Matrices Accesing image elements (row, Xcolumn)>> A(2,1)ans = 4Y : can be used to extract a wholecolumn or row>> A(:,2)ans =2A= 5 1 2 3 8 4 5 6 or a part of a column or row 7 8 9 >> A(1:2,2)ans =2 30. Flow Control Flow control in MATLAB- for loopsfor row=1:3 for col=1:3if row==col A(row, col)=1; A=elseif abs(row-col)==1 A(row, col)=2;1 2 0 2 1 2else 0 2 1 A(row, col)=0;end endend 31. THANK YOU