ECE-3690, Third Exam April 16, 2008 100 minutes
(18 pts) 1. Answer the following questions: a. Which of the following structures can operate in TEM mode: coaxial cable, dielectric slab, parallel-plate waveguide, rectangular cavity resonator? E
ECE-3690, Second Exam March 26, 2008 100 minutes
(25 pts) 1. A transmitter, which is located just beneath the surface of the sea at z=0.0, is operating at f = 4 KHz. A receiver is positioned in the water at a vertical distance of 50 meters fro
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2007 BG Mobasseri
What is the problem?
What we just went through was about picking a pulse sequence. We have not said anything about pulse shapes that make up the sequence. Square pulses are by no means the best shapes to use.
Statement of the Problem
On the way from transmitter to the receiver, we are now here
Source encoder 1 0 0 1 1.
How to pick pulse sequence? How to pick pulse shape?s
2007 Mobasseri E
PART II: ANGLE MODULATION
What is Angle Modulation?
In angle modulation, information is embedded in the angle of the carrier. We define the angle of a modulated carrier by the argument of.
s(t ) = Ac cos( (t )
PART I: AMPLITUDE MODULATION
WHAT IS ANALOG MODULATION?
Analog modulation consists of two parts
Analog message Carrier
Analog message is then impressed upon the amplitude, frequency or phase of the carrier We then say carrier is modul