ACADEMICS
Course Details

ELE734 - Digital Communications II

2022-2023 Fall term information
The course is not open this term
ELE734 - Digital Communications II
Program Theoretıcal hours Practical hours Local credit ECTS credit
PhD 3 0 3 10
Obligation : Elective
Prerequisite courses : -
Concurrent courses : -
Delivery modes : Face-to-Face
Learning and teaching strategies : Lecture, Question and Answer, Problem Solving
Course objective : The aim is to give to the students an in-depth understanding of the topics below; - Multipath fading and shadowing and their effects on bit error performance - Diversity and combining techniques to alleviate the effects of fading and shadowing, - Use of SIMO, MISO and MIMO techniques to alleviate the effects of fading and shadowing, - Multiple-access communications and related protocols.
Learning outcomes : A student completing the course successfully will understand the multipath fading and shadowing phenomena, understand the use of diversity and combining techniques to improve the system performance, understand the use and advantages of multiple antenna techniques (SIMO, MISI and MIMO) to alleviate the degrading effects of multipath fading. understand multiple-access communications and the related protocols.
Course content : Fading multipath channels: Slow/fast, flat/frequency-selective fading. BER calculations in fading and shadowing channels. Diversity and combining techniques. SIMO, MISO and MIMO systems Multiple access communications. TDD, FDD, Fixed-assignment, demand-assignment and random access protocols. ALOHA, CSMA, token-ring. Wireless access protocols and systems. Wi-Max, Wi-Fi, Bluetooth and Zig-bee.
References : Şafak, M., Digital Communications, Lecture notes, 2012; Proakis, J., Digital Communications (4th ed.), McGraw Hill, 2000; Sklar, B., Digital Communications (2nd ed.), Prentice Hall, 2001; Goldsmith, A., Wireless Communications, Cambridge University Press, 2005
Course Outline Weekly
Weeks Topics
1 Fading multipath channels. Time-variant multipath channels, statistical characterisation of multipath channels.
2 Multipath intensity profile, frequency and time selectivity, coherence time, coherence bandwidth.
3 Channel impulse response, channel model, slow fading, fast fading,
4 Mobile radio channel, digital signaling over flat and frequency selective slowly fading channels. Rake demodulator.
5 Diversity and combining techniques. Transmit vs receive diversity. Macroscopic and microscopic diversity. Time, frequency, space, angle and polarisation diversity.
6 SIMO systems. Diversity combining techniques. Pre-detection and post-detection combining. Selective and switched combining. Equal-gain combining and maximal ratio combining.
7 Midterm Exam I
8 The performance of diversity systems in fading. MISO systems with channel state information (CSI) (un)available at the transmitter. Alamouti technique.
9 MIMO systems. Diversity gain, multiplexing gain and array gain. MIMO channel capacity.
10 Multiple access communications. TDD and FDD. Fixed-assignment, demand-assignment and random access. Frequency division multiple access (FDMA), time division multiple access (TDMA) and code division multiple access (CDMA). Capacity of FDMA, TDMA and C
11 Random access methods, ALOHA, slotted ALOHA, reservation ALOHA, carrier sense multiple access (CSMA), token-ring. Polling techniques.
12 Midterm Exam II
13 Wireless access protocols and systems. WiMax, Wi-Fi, Bluetooth and Zigbee.
14 Queueing theory, Erlang-B and C formulas.
15 Preparation to Final exam
16 Final exam
Assessment Methods
Course activities Number Percentage
Attendance 0 0
Laboratory 0 0
Application 0 0
Field activities 0 0
Specific practical training 0 0
Assignments 6 5
Presentation 0 0
Project 0 0
Seminar 1 5
Quiz 0 0
Midterms 2 40
Final exam 1 50
Total 100
Percentage of semester activities contributing grade success 50
Percentage of final exam contributing grade success 50
Total 100
Workload and ECTS Calculation
Course activities Number Duration (hours) Total workload
Course Duration 14 3 42
Laboratory 0 0 0
Application 0 0 0
Specific practical training 0 0 0
Field activities 0 0 0
Study Hours Out of Class (Preliminary work, reinforcement, etc.) 14 8 112
Presentation / Seminar Preparation 1 12 12
Project 0 0 0
Homework assignment 6 4 24
Quiz 0 0 0
Midterms (Study duration) 2 30 60
Final Exam (Study duration) 1 30 30
Total workload 38 87 280
Matrix Of The Course Learning Outcomes Versus Program Outcomes
Key learning outcomes Contribution level
1 2 3 4 5
1. Has highest level of knowledge in certain areas of Electrical and Electronics Engineering.
2. Has knowledge, skills and and competence to develop novel approaches in science and technology.
3. Follows the scientific literature, and the developments in his/her field, critically analyze, synthesize, interpret and apply them effectively in his/her research.
4. Can independently carry out all stages of a novel research project.
5. Designs, plans and manages novel research projects; can lead multidisiplinary projects.
6. Contributes to the science and technology literature.
7. Can present his/her ideas and works in written and oral forms effectively; in Turkish or English.
8. Is aware of his/her social responsibilities, evaluates scientific and technological developments with impartiality and ethical responsibility and disseminates them.
1: Lowest, 2: Low, 3: Average, 4: High, 5: Highest
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