Experiments
1 Modulation & demodulation of a random binary data stream using 16 – QAM.
2 Bit error rate (BER) improvement using Pulse Shaping on 16 – QAM signal. (Use forward error correction (FEC) coding.)
3 Perform OFDM modulation and obtain time domain and frequency domain plots to show a lowrate signal, a high-rate signal, and a frequency selective multipath channel response.
4 (a) Simulate basic OFDM with no cyclic prefix.
(b) Perform Equalization, Convolution, and Cyclic Prefix Addition on basic OFDM.
5 OFDM with FFT Based Oversampling - Modify an OFDM+ Cyclic Prefix signal to efficiently output an oversampled waveform from the OFDM modulator.
6 Simulate a basic communication system in which the signal is first QPSK modulated and then subjected to Orthogonal Frequency Division Multiplexing (OFDM).
7 Obtain the scatter plots & eye diagrams of a QPSK signal to visualize the signal behaviour in presence of AWGN.
8 (a) Generate a multiband signal using the Communications Toolbox.
(b) Random noise generation using Simulink & display histogram plots of Gaussian, Rayleigh, Rician, and Uniform noise.
9 QPSK Transmitter and Receiver in Simulink.
10 Multipath Fading Channel in Simulink – For example: Simulate QPSK transmission over a
- multipath Rayleigh fading channel and
- a multipath Rician fading channel.
11 Adjacent and Co-Channel Interference using Simulink.
- Use PSK-modulated signals to show the effects of adjacent and co-channel interference on a transmitted signal.
12 Modulation Classification with Deep Learning
- Predict Modulation Type Using CNN
Course outcomes (Course Skill Set):
At the end of the course the student will be able to:
1. Perform sampling, aliasing, filtering, and quadrature modulation through simulation.
2. Plot signal space representation of digital modulation techniques.
3. Design and implement a pulse shape and matched filter to avoid inter-symbol interference and maximize receiver SNR.
4. Demonstrate advanced wireless communication techniques like Multipath fading, CCI etc. and model the same using MATLAB / Simulink.
Assessment Details (both CIE and SEE)
- The weightage of Continuous Internal Evaluation (CIE) is 50% and for Semester End Exam (SEE) is 50%.
- The minimum passing mark for the CIE is 40% of the maximum marks (20 marks).
- A student shall be deemed to have satisfied the academic requirements and earned the credits allotted to each course.
- The student has to secure not less than 35% (18 Marks out of 50) in the semester-end examination (SEE).
Continuous Internal Evaluation (CIE):
CIE marks for the practical course is 50 Marks.
The split-up of CIE marks for record/ journal and test are in the ratio 60:40.
- Each experiment to be evaluated for conduction with observation sheet and record write-up. Rubrics for the evaluation of the journal/write-up for hardware/software experiments designed by the faculty who is handling the laboratory session and is made known to students at the beginning of the practical session.
- Record should contain all the specified experiments in the syllabus and each experiment write-up will be evaluated for 10 marks.
- Total marks scored by the students are scaled downed to 30 marks (60% of maximum marks).
- Weightage to be given for neatness and submission of record/write-up on time.
- Department shall conduct 02 tests for 100 marks, the first test shall be conducted after the 8th week of
- the semester and the second test shall be conducted after the 14th week of the semester.
- In each test, test write-up, conduction of experiment, acceptable result, and procedural knowledge will carry a weightage of 60% and the rest 40% for viva-voce.
- The suitable rubrics can be designed to evaluate each student’s performance and learning ability. Rubrics suggested in Annexure-II of Regulation book
- The average of 02 tests is scaled down to 20 marks (40% of the maximum marks).
The Sum of scaled-down marks scored in the report write-up/journal and average marks of two tests is the total CIE marks scored by the student.
Semester End Evaluation (SEE):
SEE marks for the practical course is 50 Marks. SEE shall be conducted jointly by the two examiners of the same institute, examiners are appointed by the University
- All laboratory experiments are to be included for practical examination.
- (Rubrics) Breakup of marks and the instructions printed on the cover page of the answer script to be strictly adhered to by the examiners. OR based on the course requirement evaluation rubrics shall be decided jointly by examiners.
- Students can pick one question (experiment) from the questions lot prepared by the internal /external examiners jointly.
- Evaluation of test write-up/ conduction procedure and result/viva will be conducted jointly by examiners.
- General rubrics suggested for SEE are mentioned here, writeup-20%, Conduction procedure and result in -60%, Viva-voce 20% of maximum marks.
- SEE for practical shall be evaluated for 100 marks and scored marks shall be scaled down to 50 marks (however, based on course type, rubrics shall be decided by the examiners)
- Change of experiment is allowed only once and 15% Marks allotted to the procedure part to be made zero.
- The duration of SEE is 03 hours
Rubrics suggested in Annexure-II of Regulation book
Suggested Learning Resources:
1. Communication Toolbox – Examples (https://in.mathworks.com/)
2. "Digital Communication Laboratory" Courseware by Professor Lee C Potter, Dr. Yang Yang, Electrical and Computer Engineering, The Ohio State University.