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EC6402 Communication Theory Hand Written Lecture Notes - Lavanya Edition
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Communication Theory Premium Lecture Notes, Prepared by Lavanya. Specially for Electronics and Communication Engineering. Syllabus Covered based on Anna University B.E Electronics and Communication Engineering


CONTENT:

UNIT-1 AMPLITUDE MODULATION (pg.no 1-54)
UNIT-5 INFORMATION THEORY (55-84)

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UNIT-1

AMPLITUDE MODULATION
Introduction
Operation of the receiver
1. Demodulation
2. Decoding
Bandwidth
Information capacity
Need formulation
1. For effective treatment
2. Frequency transulation
3. Multiplexing
Amplitude modulation
Angle modulation
Principle of amplitude modulation
Percent modulation
Generation method of AM wave
1. Linear modulation
a. Transistor
b. Switching modulators
2. Non-linear modulators
a. Square law modulators
b. Product modulators
c. Balanced modulators
Generation of DSB-SC AM
Two types
1. Balanced modulator
2. Ring modulator
Limitations
Advantages
Generation of VSB signal
Detection of DSB-SC and SSB-SC
Advantages
Mixer selection
IF selection
Detector selection
Audio amplifier section
Comparision of various AM system

UNIT-5

INFORMATION THEORY
Introduction
Uncertainity
Measure of information
Properties of information
Entropy
Properties of entropy
Bandwidth efficiency
Information rate
Mutual information
Channel coding theorem
Channel coding
Channel capacity
Huffman coding
Drawbacks of Huffman coding
Shannon fano coding

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