Digital Communication Systems
Teacher
Dr. Harish Chandra Mohanta
Category
Core Courses
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Course Name : Digital Communication Systems
Code : CUTM1044 (2-1-0)
Course Objectives
- To impart the fundamentals of modern digital communication system design.
- To evaluate the performance of digital signaling schemes on realistic communication channels.
- Know the techniques of digital communication, information theory, and error control coding.
Course Outcomes
COs Course Outcomes POs
CO1 Knowledge to analyze the performance of a PO1(3)
baseband and pass band digital communication
system in terms of error rate and spectral efficiency
and Perform the time and frequency domain analysis
of the signals in a digital communication system.
CO2 Develop Analytical understanding about PO2(3), PO3(2)
performance of digital communication systems.
CO3 Problem solving regarding the bandwidth PO3(3), PO6(2)
and power requirements for digital systems.
Course Syllabus
Module I (05 Hours)
Digital Representation of Analog Signal:
Sampling Theorem, Signal reconstruction from uniform samples, Quantization of signals, Quantization error, PCM, Electrical representation of binary digits, PCM System, Companding.
Practice: (using Trainer Kit and MATLAB)
Analysis of Sampling theorem by using the Trainer Kit and MATLAB.
PCM Modulation and Demodulation using Trainer Kit and MATLAB.
Module II (5 Hours)
Issues in Digital transmission: Line coding, Scrambling, T1-Digital System, Multiplexing T1 lines – The T2, T3, T4, E1 lines, Differential PCM: Linear predicted design, Delta Modulation, Adaptive Delta Modulation.
Practice: (using Trainer Kit and MATLAB)
Differential PCM Modulation and Demodulation using Trainer Kit and MATLAB.
Delta Modulation and Demodulation using Trainer Kit and MATLAB.
Module III (6 Hours)
Digital Modulation Techniques:
Generation, Transmission, Reception, Spectrum, and Geometrical Representation in the Signal Space of BPSK, QPSK, QASK, M-ary PSK, BFSK, M-ary FSK, Minimum Shifting Keying (MSK), QAM, 4-QAM, 8-QAM, and 16-QAM.
Practice : ( using Trainer Kit and MATLAB)
PSK Modulation and Demodulation using Trainer Kit and MATLAB.
FSK Modulation and Demodulation using Trainer Kit and MATLAB.
ASK Modulation and Demodulation using Trainer Kit and MATLAB.
Module IV (5 Hours)
Noise in PCM and DM: Calculation of Quantization Noise, Output Signal Power, and the Thermal Noise, Output SNR in PCM, Quantization noise in Delta Modulation, output signal power, output SNR, Comparison with PCM and DM.
Practice: (using MATLAB)
SNR study of PCM using MATLAB.
SNR study of Delta Modulation using MATLAB.
Module V (3 Hours)
Principle of Digital Data Transmission:
Digital Communication Systems – Source, Line coder, Multiplexer, Regenerative repeater, Line Coding: PSD of various line codes, polar signaling, constructing a DC Null in PSD by pulse shaping, On-Off signaling, Bipolar signaling; Pulse shaping – ISI and effect, Nyquist first criterion for zero ISI, Equalizers, Timing extraction, Detection error, Eye Diagram.
Module VI (5 Hours)
A baseband signal Receiver, Peak signal to RMS noise output voltage ratio, probability of error, optimum threshold, optimum receiver for both baseband and passband: calculation of optimum filter transfer function, optimum filter realization using a Matched filter.
Practice: (using MATLAB)
Study of optimum filter realization using MATLAB.
Module VII (04 Hours)
Discrete Messages and information contents:
Information theory: entropy, mutual information, and channel capacity theorem. Shannon coding, Hoffman coding. Fundamentals of error correction, hamming codes.
Practice: (using MATLAB)
Study of Hamming codes using MATLAB.
Study of error correction using MATLAB.
Reference
Text Book:
Principles of Communication Systems by H Taub, D. L. Schilling, and G Saha, 3rdEdition 2008, TMH Education Pvt. Ltd, New Delhi,
Reference Books:
- Modern Digital and Analogue Communication Systems by B.P. Lathi and Z Ding, 4th Edition 2010, Oxford University Press, New Delhi.
- Communication Systems by Simon Haykin, 4thEdition, John Wiley & Sons, Inc.
- Digital Communications, Proakis, and Salehi, 5th Edition, Pearson Edu.
Session Plan
Session 1
Block diagram of the digital communication system. Advantages and disadvantages of the digital communication system. Sampling Theorem, Signal reconstruction from uniform samples.
https://www.youtube.com/watch?v=gMtWKQRbsRg
Session 2
Quantization of Signals, Quantization error, PCM
https://www.youtube.com/watch?v=cUdnGkymAWU&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=30
https://www.youtube.com/watch?v=Ab9NIDRNakE&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=31
Session 3
Electrical representation of binary digits, PCM System, Companding.
https://www.youtube.com/watch?v=q39NTeIIIZ4&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=43
https://www.youtube.com/watch?v=ByMoziFuKVI&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=44
Session 4
Lab Practice
Analysis of Sampling theorem by using the Trainer Kit and MATLAB.
https://www.youtube.com/watch?v=hJ569dc0GVg&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=41
http://ssl-iitg.vlabs.ac.in/Sampling%20and%20signal%20reconstruction(video).html
Session 5
PCM Examples
Lab Practice
PCM Modulation and Demodulation using Trainer Kit and MATLAB.
https://www.youtube.com/watch?v=MMbu5CXVxIY&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=39
https://www.youtube.com/watch?v=OVMBJTkAYmg&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=40PCM Experiment
Session 7
T1 Digital System, Multiplexing T1 lines – The T2, T3, T4, E1 lines.
https://www.youtube.com/watch?v=bX6Bg3V1Ki8&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=61
Session 8
Differential PCM: Linear predicted design.
https://www.youtube.com/watch?v=PFbm-jsTIpA&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=47
Session 9
Differential PCM Modulation and Demodulation.
Lab Practice
Differential PCM Modulation and Demodulation using Trainer Kit and MATLAB.
Session 10
Delta modulation and adaptive delta modulation.
Lab Practice
Delta Modulation and Demodulation using Trainer Kit and MATLAB
https://www.youtube.com/watch?v=vzkLq0tcmhw&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=52
PPTs Pdf :
http://courseware.cutm.ac.in/wp-content/uploads/2020/05/DPCM_DM_ADM.pdf
Session 11
Generation, Transmission, Reception, Spectrum, and Geometrical Representation in the Signal Space of ASK, BPSK, QPSK, QASK.
https://www.youtube.com/watch?v=ucrZlde8vtk
https://www.youtube.com/watch?v=c1z9LiRpxLk&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=16
http://vlab.amrita.edu/index.php?sub=59&brch=163&sim=1065&cnt=2404
http://courseware.cutm.ac.in/wp-content/uploads/2020/05/DCS_PPT.pdf
Session 12
Generation, Transmission, Reception, Spectrum, and Geometrical Representation in the Signal Space of M-ary PSK, BFSK.
https://www.youtube.com/watch?v=WAgEiyr_GjY&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=17
http://courseware.cutm.ac.in/wp-content/uploads/2020/05/DCS_PPT.pdf
Session 13
M-ary FSK, and Minimum Shifting Keying (MSK).
https://www.youtube.com/watch?v=WAgEiyr_GjY&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=17
Session 14
PSK Modulation and Demodulation.
Lab Practice
PSK Modulation and Demodulation using Trainer Kit and MATLAB.
http://vlab.amrita.edu/index.php?sub=59&brch=163&sim=263&cnt=2407
Session 15
ASK Modulation and Demodulation
Lab Practice
ASK Modulation and Demodulation using Trainer Kit and MATLAB.
Session 16
FSK Modulation and Demodulation.
Lab Practice
FSK Modulation and Demodulation using Trainer Kit and MATLAB.
Session 17
Calculation of Quantization Noise, Output Signal Power, and the Thermal Noise.
https://www.youtube.com/watch?v=lGZhdKUGFoU&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=33
http://courseware.cutm.ac.in/wp-content/uploads/2020/05/DCS_PPT.pdf
Session 18
Output SNR in PCM.
https://www.youtube.com/watch?v=3jZC-6U1Ygo&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=38
Session 19
Quantization noise in Delta Modulation, output signal power, output SNR, Comparison with PCM and DM.
https://www.youtube.com/watch?v=y9gpu_5YuvQ&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=55
http://courseware.cutm.ac.in/wp-content/uploads/2020/05/DCS_PPT.pdf
Session 20
SNR of PCM
Lab Practice
SNR study of PCM using MATLAB.
https://www.youtube.com/watch?v=1LvgKXmlQT4&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=51
Session 21
SNR of delta modulation.
Lab Practice
SNR study of DM using MATLAB
https://www.youtube.com/watch?v=y9gpu_5YuvQ&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=55
Session 22
Digital Communication Systems – Source, Line coder, Multiplexer, Regenerative repeater.
https://www.youtube.com/watch?v=daf9F9NC7zQ&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=66
https://www.youtube.com/watch?v=SvO_fZB3Ltw&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=5
http://courseware.cutm.ac.in/wp-content/uploads/2020/05/DCS_PPT.pdf
Session 23
PSD of various line codes, polar signalling, constructing a DC Null in PSD by pulse shaping, On-Off signalling, Bipolar signalling.
https://www.youtube.com/watch?v=jhlWmgDLFhk&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=67
https://www.youtube.com/watch?v=T4a6dh5FMhE&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=68
http://courseware.cutm.ac.in/wp-content/uploads/2020/05/DCS_PPT.pdf
Session 24
Pulse shaping – ISI and effect, Nyquist first criterion for zero ISI.
https://www.youtube.com/watch?v=0bM-wYNdxJg&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=64
PPTs Pdf:
Session 25
Regenerative repeaters, Equalizers, Timing extraction, Detection error, Eye Diagram.
https://www.youtube.com/watch?v=sv4WuD3CdeU&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=6
Session 26
A baseband signal Receiver, Peak signal to RMS noise output voltage ratio.
https://www.youtube.com/watch?v=-VjaVs7FYcw&list=PLXnsjPD8-xuuIC5GyfL8Iy6xysO2x4eMt&index=5
http://courseware.cutm.ac.in/wp-content/uploads/2020/05/DCS_PPT.pdf
Session 27
Probability of error, optimum threshold, optimum receiver for both baseband and passband: calculation of optimum filter transfer function.
https://www.youtube.com/watch?v=DipA60gcuQ4&list=PLXnsjPD8-xuuIC5GyfL8Iy6xysO2x4eMt&index=94
https://www.youtube.com/watch?v=Ibo_iB87ZuU&list=PLXnsjPD8-xuuIC5GyfL8Iy6xysO2x4eMt&index=95
Session 28
Optimum filter realization using a matched filter.
https://www.youtube.com/watch?v=cQiGfvI0lzI&list=PLXnsjPD8-xuuIC5GyfL8Iy6xysO2x4eMt&index=99
https://www.youtube.com/watch?v=bqpE12MygQg&list=PLXnsjPD8-xuuIC5GyfL8Iy6xysO2x4eMt&index=100
Session 29
Correlator / Coherent Receiver for a digital carrier modulation.
Lab Practice
Study of optimum filter realization using MATLAB.
https://www.youtube.com/watch?v=bqpE12MygQg&list=PLXnsjPD8-xuuIC5GyfL8Iy6xysO2x4eMt&index=100
Session 30
Information theory: entropy, mutual information, and channel capacity theorem.
https://www.youtube.com/watch?v=18E3NllObqg&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=73
https://www.youtube.com/watch?v=Wc0oB04JOkI&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=76
Session 32
Fundamentals of error correction, hamming codes
https://www.youtube.com/watch?v=EJpxAQ_DUJ4&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=83
https://www.youtube.com/watch?v=RXhLM1Q1wo4&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=84
Session 33
Hamming code error detection and error detection.
Lab Practice
- Study of Hamming codes using MATLAB.
- Study of error correction using MATLAB.
https://www.youtube.com/watch?v=9yWZM-9PKE8&list=PLgwJf8NK-2e5PngHbdEadEun5XPvnn00N&index=89
https://www.youtube.com/watch?v=IVi7PXi7yiI
Our Main Teachers
I received my M. Tech degree in 2015 from IIT, Kharagpur and PhD degree from Deakin University, Australia in 2021. Now, I am working as a Professor and HOD in the Departmentof Electronics and Communication Engineering, SoET, Bhubaneswar campus, CUTM. Research Interests: Wireless Energy Harvesting System. Metamaterial Study. Printed Microstrip Antenna Design. Transceiver […]