Download EC2252-LP - Rajalakshmi Institute of Technology

RAJALAKSHMI INSTITUTE OF TECHNOLOGY, CHENNAI 602124
DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING
Lesson plan
Sub code & Name: EC 2252 COMMUNICATION THEORY
Semester & Year :IV sem/II year
Branch
:ECE
Faculty
: Ms.S.Manimegalai/Lecturer
I AIM
To study the various analog communication fundamentals viz., Amplitude modulation
and demodulation, angle modulation and demodulation. Noise performance of various
receivers and information theory with source coding theorem are also dealt.
II OBJECTIVE
To provide various Amplitude modulation and demodulation systems.
To provide various Angle modulation and demodulation systems.
To provide some depth analysis in noise performance of various receiver.
To study some basic information theory with some channel coding theorem.
III. SYLLABUS :
EC 2252 COMMUNICATION THEORY
L T P C
3 1 0 4
UNIT I AMPLITUDE MODULATION SYSTEMS
10
Review of Spectral Characteristics of Periodic and Non-periodic signals; Generation and
Demodulation of AM, DSBSC, SSB and VSB Signals; Comparison of Amplitude Modulation
Systems; Frequency Translation; FDM; Non – Linear Distortion.
UNIT II ANGLE MODULATION SYSTEMS
8
Phase and Frequency Modulation; Single tone, Narrow Band and Wideband FM;
Transmission Bandwidth; Generation and Demodulation of FM Signal.
UNIT III
NOISE THEORY
8
Review of Probability, Random Variables and Random Process; Guassian Process; Noise
– Shot noise, Thermal noise and white noise; Narrow band noise, Noise temperature; Noise
Figure.
UNIT IV
PERFORMANCE OF CW MODULATION SYSTEMS
10
Superheterodyne Radio receiver and its characteristic; SNR; Noise in DSBSC systems
using coherent detection; Noise in AM system using envelope detection and its FM system; FM
threshold effect; Pre-emphasis and De-emphasis in FM; Comparison of performances.
UNIT V
INFORMATION THEORY
9
Discrete Messages and Information Content, Concept of Amount of Information,
Average information, Entropy, Information rate, Source coding to increase average information
per bit, Shannon-Fano coding, Huffman coding, Lempel-Ziv (LZ) coding, Shannon’s Theorem,
Channel Capacity, Bandwidth- S/N trade-off, Mutual information and channel capacity, rate
distortion theory, Lossy Source coding.
TUTORIAL 15 TOTAL : 60
TEXT BOOKS
1. Dennis Roddy & John Coolen - Electronic Communication (IV Ed.), Prentice Hall of India.
2. Herbert Taub & Donald L Schilling – Principles of Communication Systems ( 3rd Edition ) –
Tata McGraw Hill, 2008.
REFERENCE:
1. Simon Haykin, Communication Systems, John Wiley & sons, NY, 4th Edition, 2001.
2. Bruce Carlson - Communication Systems. (III Ed.), Mc Graw Hill.
3. B.P.Lathi, Modern Digital and Analog Communication Systems, Third Edition, Oxfod
Press,2007.
4. R.P Singh and S.D.Sapre, “Communication Systems – Analog and Digital”, Tata McGraw
Hill, 2nd Edition, 2007.
5. John G. Proakis, Masoud Salehi, Fundamentals of Communication Systems, Pearson
Education, 2006.
IV. LESSON PLAN
SL.No &
Date
Topic
Cumulative
Hours
Unit
Required
Ref
Hours
Books
1
15.12.10
Introduction to communication - representation of
signal – time domain, frequency domain
1
1,3
3
16.12.10
Classification of signal - continuous time signal,
discrete time signal - Review of spectral characteristics
of periodic and non-periodic signal.
2
1,3
4
17.12.10
Need for modulation, amplitude modulation, degrees
of modulation, power and current relation in AM
1
1,2,3
5
20.12.10
Generation of AM – square law, balanced, Switching,
High and low level modulators.
2
7
21.12.10
Demodulation of AM – Square law, Envelope detector.
2
1,2,3
9
22.12.10
Tutorial
1
1,2,3
10
23.12.10
DSB-SC modulation, Generation of DSB-SCBalanced, Ring modulator
2
1,3, 6
12
24.12.10
Demodulation of DSB-SC - Coherent, Envelope
detector.
1
1,2,3
13
27.12.10
SSB modulation and Generation of SSB-SC-Filter,
phase shift, Weavers method. Demodulation of SSBSC - coherent
2
1,2,3
15
28.12.10
VSB modulation, Generation of VSB signals- phase
discrimination method, Demodulation of VSB signals
2
16
29.12.10
Comparison of Amplitude modulation systems,
Frequency Translation
1
2,3,4
17
30.12.10
FDM, Non – Linear Distortion
1
1,3, 6
Unit I
1,2,3
18
31.12.10
Tutorial
2
1,3
20
03.01.11
Introduction, angle modulation-Frequency modulation,
PM
1
1,3,5
21
04.01.11
Single tone FM, Narrow band FM- Generation
1
2,3
22
05.01.11
Wideband FM - Generation
1
3,5
23
06.01.11
Transmission bandwidth of FM
1
24
07.01.11
Tutorial
1
Generation of FM signal-Direct FM (reactance tube,
varactor diode, VCO)
2
2,3,5
26
Unit
II
2,3
3,5,6
27
08.01.11
Generation of FM signal-Indirect FM (Armstrong
method)
1
2,3,5
28
10.01.11
Demodulation of FM signals - slope detector
1
2,3,5
29
11.01.11
Demodulation of FM signals - phase difference
detector Comparison of AM, FM, PM.
1
2,3,5
30
12.01.11
Tutorial
2
3,5,6
32
13.01.11
Review of probability - mathematical definition, law of
probability, conditional probability
1
6
33
18.01.11
2
6
35
19.01.11
Random Variables - discontinuous, discrete,
distribution function, numerical characteristics and
distribution laws of random variable
Random process, Gaussian process - properties
1
6
36
20.01.11
Introduction to Noise, shot noise, thermal noise, white
noise
1
37
21.01.11
Noise equivalent bandwidth, narrow band noise and its
properties
1
1,6
38
24.01.11
Representation of narrow band noise in terms of
envelope and phase components
1
3
39
25.01.11
Tutorial
1
1,3,6
40
27.01.11
Sine wave plus narrow band noise – Rician
1
3
Unit
III
1,6
Distribution.
41
28.01.11
Noise temperature, Noise Figure.
1
1,2
42
31.01.11
Tutorial
2
1,2,3,6
44
01.02.11
Super heterodyne AM receiver and its characteristic
1
1,3,6
45
02.02.11
SNR - Noise in AM receivers-Envelope detection
1
1,3,5
46
03.02.11
Noise in DSB-SC receiver - coherent detection
1
13,,5
47
04.02.11
Noise in SSB receiver- coherent detection,
1
13,,5
AM Threshold effect
49
07.02.11
Super heterodyne FM receiver and its characteristic
2
1,3,5
50
08.02.11
Noise in FM receivers –Super heterodyne type.
1
3,5
51
09.02.11
Tutorial
1
3,6
Unit
IV
52
10.02.11
FM Threshold effect
1
54
11.02.11
FM threshold reduction-FMFB demodulator
2
3,6
55
14.02.11
Pre-emphasis and de-emphasis in FM, Comparison of
performance of AM and FM systems
1
1,5
56
15.02.11
Tutorial
2
1,6
58
16.02.11
Introduction – discrete message, Uncertainty, measure
of information and properties, Information rate
1
2,3
59
17.02.11
Entropy and its properties
1
2,3,6
60
18.02.11
Source coding theorem, data compaction - prefix,
shannonfano coding.
2
2,3,6
62
21.02.11
Data compaction -Huffman, Lempel ziv coding
2
2,3,6
64
22.02.11
Tutorial
1
65
23.02.11
Channel Capacity, Bandwidth- S/N trade-off
1
66
24.02.11
Mutual information-Properties.
1
Unit
V
3,6
2,3,6
2,3,6
2,3,6
67
28.02.11
Tutorial
1
2,3,6
68
01.03.11
Channel capacity - loss less, Deterministic, noiseless,
binary symmetric, binary erase, unsymmetric
2
2,3,6
70
02.03.11
Rate distortion theory, Lossy source coding
1
2,3
71
03.03.11
Tutorial
1
2,3,6
Signature of the faculty
Signature of HOD/ECE