Syllabus of GTU Digital Communication 6th Sem EC

Syllabus of GTU Digital Communication 6th Sem EC


Electronics & Communication Engineering




Subject Name: Digital Communication

Subject Code: 161001


1. Probability Theory & Random Variables :

Information, Probability, Conditional Probability of independent events,

Relation between probability and probability Density , Releigh Probability

Density , CDF, PDF, Random Variables, Variance of a Random Variable,

,correlation between Random Variables, Statistical

Averages(Means),Mean and Variance of sum of Random variables, Linear

mean square Estimation, Central limit theorem, Error function and

Complementary error function Discrete and Continuous Variable, Gaussian

PDF, Threshold Detection, Statistical Average,Chebyshev In Equality, Auto



2. Information Theory :

Concept & Measure of information, Source Coding, Error Free

Communication Over a noisy channel, Shannon Theorem, The channel

capacity of a Discrete Memory less Channel, Optimum System, The

channel capacity of a Continuous Channel, Practical Communication

System In Light of Shannon’s Equation.


3. Formatting a Base Band Modulation :

Base band system, The Sampling Theorem, Sampling and interpolation

functions,Spectra,Nyquist Theorem, Under sampling, Applications

,Aliasing, PCM, DPCM, ADPCM, Uniform and Non-uniform Quantization,

Quantization Error in PCM,Delta Modulation, Adaptive Delta Modulations

,SNR Calculation,Non-uniform Quantization, Phase Modulation..


4. Digital communication system :

Digital multiplexing ,line coding, PSD on /off signaling, Bipolar signaling,

Duo binary signal, pulse shapping, Nyquist first and second criterion for

zero ISI,Regenerative repeaters,Detection error Probability, M-ary System,

Scrambling,Digital Carrier System


5. Error Correcting Codes :

Introduction, Linear block code, cyclic code, convolution code, Burst Error

Correcting and detecting code, Interlaced code for burst and random error

Generation, Comparison of coded and un-coded system.


6. Digital Modulation Techniques :


of various digital modulation techniques.


7. Digital Communication Systems in the Presence of Noise :

Noise Figure, Signal to noise Ratio, performance of communication system

with channel noise, Optimum Binary Receiver.


8. Digital Carrier Demodulation Techniques :

Coherent and non-coherent detection of ASK, FSK, PSK, QPSK,DPSK.


9. Spread Spectrum Communications :

Introduction to Frequency hopping, Introduction to direct sequence Spread

Spectrum, Introduction to CDMA, Overview of latest trends in digital



Text Books:

1. Digital and analog communication system by B.P.Lathi .Zhi Ding(international 4th

Edition), OXFORD university press.

2. Principle of communication system by Taub . Schilling (2nd Edition), TATA



References Books:

1. An Introduction to Analog and Digital Communications by Simon Haykin, Wiley India.

2. Digital Communications by Simon Haykin, Wiley India.


List of Suggested Practical Assignments:

1. To understand and the concept of Pulse Code Modulation and To observe the

Performance of PCM system.

2. To understand and the role of signal compression/Expansion on S/N ratio.

3. To understand the concept of Delta Modulation and to achieve the Delta Modulation /De- Modulation.

4. To study the performance of An-adaptive Delta modulator/De-modulator circuits

5. To Study and observe the performance of Digital carrier system—ASK.

6. To Study and observe the performance of Digital carrier system—FSK.

7. To Study and observe the performance of Digital carrier system—PSK.

8. To Study and observe the performance of Return to Zero (RZ) types of line codes.

9. To Study and observe the performance of Non- Return to Zero (NRZ) types of line


10. To establish a PCM based transmission-reception link.

11. To Study and observe the effect of signal Distortion using EYE-Diagram.

12. To Study and Perform sampling theorem and reconstruction.

13. To Study and perform Error Detection and Correction codes.

14. To perform TDM-PCM Transmission and Reception.

15. To study and perform Data Conditioning carrier modulation.

16. To study and perform Data Re-Conditioning carrier De-modulation.

17. To study and perform TDM pulse amplitude modulation/demodulation.

18. To study and perform PAM, PWM, PPM.

19 Few simulation exercises on digital communication techniques / basic systems


Mini Project

Mini project with emphasis on design and implementation is compulsory with the help of

hardware and simulation tools.

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