Simulink Tutorial University of Texas, Austin VLSI Communication …

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Simulink Tutorial. University of Texas, Austin. VLSI Communication Systems. Spring 2005. Disclaimer: Tools are made to be played with. Overview: …

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Simulink Tutorial
University of Texas, Austin
VLSI Communication Systems
Spring 2005
Disclaimer: Tools are made to be played with
Overview:
Simulink is a software add-on to Matlab used for simulating dynamic systems - governed by a set of differential
equations for continuous time and a set of difference equations for discrete time systems. It uses the powerful and
extensive numerical analysis capability of Matlab. Typically, the Matlab ode or pde solvers are used to solve sets of
linear and nonlinear ordinary differential equations. The dataflow is modeled by connecting standard building blocks
available in the Simulink libraries and some enhanced toolboxes e.g. DSPs, Neural Net.
Simulink supports modeling at different levels of abstractions thereby facilitating evaluation of
architectural level tradeoffs for complex systems.
Starting Simulink:
1. Start Matlab, by double clicking on the Matlab icon or typing Matlab from terminal.
2. In the Matlab command window, type Simulink
3. Select New > Model from the File menu. This creates a new workspace where the block diagram for the
system will be created.
Given below is a snapshot of the Simulink library browser.Popular library components:
Sources and sinks
Discrete and Continuous time systems
Mathematical Operator
Logic operators
User-defined functions
Subsystem
Simulink extras
Creating models in Simulink:
1. “drag” a block icon from the library browser window to the current workspace for the model
(Alternatively select the block and select Edit - Copy, then go to the new workspace and select Edit -
Paste). Repeat this for all the submodules of the system.
2. “connect” these icons together by drawing lines connecting them using the left-most mouse button
(hold the button down and drag the mouse to draw a line) An arrow will appear to show the direction of
the signal flow.
3. “Open” the icons (by double clicking on them with the left-most mouse button) and set the values of
the various parameters; e.g. a sine wave generating source comes with parameters like amplitude,
frequency, initial phase etc.
4. Select the parameter field from the simulation menu (in the block diagram window) and set the
proper integration details (min and max stepsizes, start and stop integration times, integration code, etc.).
Finally, select start from the simulation menu to start the…