Limits of communication systems
Noise in Communication
Noise is a general term which is used to describe the random and unwanted
signals which affect a wanted signal and carry no information.
Noise
Modulation
Modulation is the process of moving a low-frequency signal to a high-frequency
and then transmitted the high-frequency signal. Generally the low-frequency
signal carrying the original infor
Pulse Analog Modulation : Pulse Amplitude Modulation (PAM)
Pulse-amplitude modulation (PAM), is the simplest form of analog pulse
modulation. PAM is a form of signal modulation where the message infor
Karabuk University
Department of Electrical and Electronic Engineering
EEE 362
Analog Communication Systems
Assist. Prof. Dr. Ayad A. Abdulkafi
2017
EEE362 Analog Communication
1
Outlines
Introductio
Karabuk University
Department of Electrical and Electronic Engineering
EEE 362
Analog Communication Systems
Assist. Prof. Dr. Ayad A. Abdulkafi
2017
EEE362 Analog Communication
1
Outlines
Introductio
Delta Modulation (DM)
PCM is a very complex technique. Other techniques have been developed to reduce the
complexity of PCM. The simplest is delta modulation (DM). PCM finds the value of the signal
am
Review of Fourier transform and its properties.
EEE362 Analog Communication
33
Review of Fourier transform and its properties.
EEE362 Analog Communication
34
Review of Fourier transform and its proper
%Experiment 3
%Writing a function that generates unit impulse signal
%Input to be given are t1=start time in second , t2=end time in second,
0=delay in second,fs=sampling frequency
function [x,t]=unit
%Experiment 6a
%This find frequency content of a rectangular pulse through FFT
fs=10;
ampling frequency fs, in each cycle fs/f samples
t = 0:1/fs:30;
ampling time 0 to 30 second at interval of 1/fs
v
%Experiment 1
%Generation of square wave
f=50; D=50;
0undamental frequency f, duty cycle in percentage D
fs=1000;
ampling frequency fs, in each cycle fs/f samples
t = 0:1/fs:0.1;
ampling time 0 to 0.1
Communication Lab.
Pulse
Experiment No. 5
Modulation
Object:
To study the methods of generating PAM signals and how to calculate the sampling
frequency (fS ) .
Theory:
The pulse modulation is based on
Communication Lab.
Delta
Experiment No. (5)
Modulation (DM)
:Object
To study the methods of generating Delta Modulation signals and how to calculate the
signal to noise ratio(S/N).
Theory:Pulse code m
Communication Lab.
Pulse Code
Experiment No. (4)
Modulation (PCM)
:Object
To study the methods of generating PCM signals.
Theory:The generation of PCM is a three step process as illustrated in Fig.(4-
Communication Lab.
Pulse Code
Experiment No. (4)
Modulation (PCM)
:Object
To study the methods of generating PCM signals and how to calculate the signal to
quantization noise ratio ( S Q ).
Theory:The
Communication Lab.
Amplitude
Experiment No. 3
Modulation (AM)
Object:
To study the methods of generating AM signals and how to calculate the
modulation index (m).
Theory:
The term Amplitude Modulation
Communication Lab.
The
Experiment No. 1
Adder
Object:
To study the effect of the summing 0n the amplitude, frequency and shape of the
signals.
Theory:
Adders are modules used throughout communications
Communication Lab.
Digital modulation
Digital modulation is carried by using a sinusoidal carrier modulated (shift Keying) by
using the information (message) which is digital. The Fig. below shows the
Communication Lab.
Phase Shift Keying
Experiment No. (3)
Modulation (PSK)
:Object
.To study the methods of generating PSK signals
Theory:In this method, the phase can only adopt two discrete values. T
Karabuk University
Electrical-Electronics Engineering
Signals and Systems
1.7 Fourier Analysis
The subject of Fourier analysis is concerned with representing a signal as weighted
superposition of com
Karabuk University Electrical-Electronics Engineering Signals and Systems
Homework 1
1- For the following signal, determine whether it is even, odd, or neither.
2- Find the energies of the following s
Karabuk University Electrical-Electronics Engineering Signals and Systems
Homework 1
1- For the following signal, determine whether it is even, odd, or neither.
2- Find the energies of the following s
Karabuk University Electrical-Electronics Engineering Signals and Systems
Solutions of Homework 1
1. By definition a signal is even if and only if x(t) = x(-t) or x[n] = x[-n], while a signal is odd i
Karabuk University Electrical-Electronics Engineering Signals and Systems
Homework 2A
1- Indicate whether the following systems are causal, invertible, linear, memoryless, and/or time
invariant by cir
NET351: Signal and System Analysis
Assignment 2 Solution
Definitions: A system y=Tcfw_x is:
Memoryless: IF the output y at any time depends on only the input at that
same time. Otherwise (previous or
Karabuk University
Electrical-Electronics Engineering
Signals and Systems
COURSE CODE: EEE 363
COURSE NAME: Signals and Systems
Outlines
Introduction to Signals and Systems
Classification of Signal
COMMUNICATION SYSTEM EECB353
Chapter 4
NOISE ANALYSIS
Noise Analysis
Noise is any undesired signal that ultimately appears in the
output of a communications system.
Electrical noise is defined as any
Image Processing using Matlab
Images in Matlab
Matlab is optimised for operating on
matrices
Images are matrices!
Many useful built-in functions in the
Matlab Image Processing Toolbox
Very easy to