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Arab American UniversityArab American University--JeninJeninArab American UniversityArab American University--JeninJenin
Faculty of Engineering and Information Technology
Telecommunications Engineering Department (TCE)Modelling and Simulation of Modelling and Simulation of
Communication SystemsCommunication Systems
Usin MATLAB and SIMULINKUsin MATLAB and SIMULINK
((1107141411071414))
Instructors: Dr. Hazem Khanfar
Eng. Bashar Mousa
Miss Ola Sbihat
Contacts:
PHONE: Ext. 613 E-MAIL: [email protected]
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Chapter 1: Introduction
Chapter 1: Introduction
Modeling and Simulation
Objective: To study and evaluate the behavior and performance
of systems
Computer-aided techniques developed to assist in
o e ng, na yz ng, an es gn ng o ommun ca on ys ems.
These techniques fall into two categories:
1. Formula-Based approach
2. Simulation-Based approach
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Chapter 1: Introduction
Chapter 1: Introduction
Modeling and Simulation of Communication Systems
The performance of comm. Systems can be evaluated using:
1. Formula-Based Calculations
(Analytical techniques, not tractable)
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2. Wave-from level simulation
(combine mathematical and empirical models)
3. Hardware prototyping and measurements
(costly and time consuming)
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Chapter 1: IntroductionChapter 1: Introduction
Modeling and Simulation of Communication Systems
Communication systemsPerformance Evaluation Techniques
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Formula-Based
Calculations
Wave-from level
simulationHardware prototyping
and measurements
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Chapter 1: IntroductionChapter 1: Introduction
Communication System can be:
Global communication network
Geosynchronous communication satellite
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Terrestrial microwave transmission system
Built-in modem in a personal computer
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Chapter 1: IntroductionChapter 1: Introduction
Simulation “hierarchy”
NetworksEvent driven simulations:
ns2, Opnet
Packets, messages, flows
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Links
DSP Circuits RF
Time driven simulations:SPW, Cossap, Simulink/Matlab
Algorithm simulations:
TI CodeComposer
Waveforms
Circuit simulations:
NC-{VHDL/Verilog}, Scirroco,
RF simulations:
PSpice, ADS,XFDTD
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Chapter 1: IntroductionChapter 1: Introduction
Modeling and Simulation of Communication Systems
Hierarchical View
1. The top level is the comm. network, satellite, terrestrial, etc…
2. A link is made up of elements like modulators, encoders,
amplifiers. These might be analog or digital.3. The bottom layer deals with implementation of components such
as filters and equalizers, etc…
4. Circuit Simulations like SPICE or HDL
5. The focus of this course is on wave-form level simulation of
communication links (middle layer)
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Chapter 1: IntroductionChapter 1: Introduction
Wave-from level Simulation of Communication Systems
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1. We are interested in evaluating BER performance of the system2. Analytical evaluation of BER is difficult because of nonlinearity
which leads non-Gaussian and non-additive noise
3. Some approximations can be made but not accurate.
4. Estimation of errors via simulation involves generation of input signals (input and two noise signals)
5. Process these inputs through models for filters and
amplifiers.
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Chapter 1: IntroductionChapter 1: Introduction
Modeling and Simulation of Communication Systems
Historical Perspective
1. Waveform-level simulation started with the invention of analog
computers in the 1940’s (aircrafts and weapon systems)
2. In 1960’s, di ital simulation ori inated with block-oriented
languages such as MIDAS SCADS, …3. Applications of digital computers to circuit analysis with
programs such as ECAP, SPICE in the mid of 1960’s.
4. Software packages based on FFT and Z-transform began in early
1970’s such as SYSTID, CSMP, CHAMP, LINK.5. The BOSS software package was the first for simulation of
comm. systems (SPW, MATLAB/SIMULINK).
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