OFDM and BEYOND for WIRELESS COMMUNICATIONS

AIM

Due to their ability to provide high data rates for multimedia applications, multi-carrier modulation techniques have gained a strong interest for wide area, local area, and personal area networks over the last decade. A special case of multi-carrier modulation is orthogonal frequency division multiplexing (OFDM) that can overcome many problems that arise with high bit rate communication, the biggest of which is the time dispersion. OFDM has found applications in many wireless technologies including digital audio and video broadcasting in Europe, high-speed wireless local area networks (WLANs) standards in Europe (Hyperlan2) and USA (IEEE 802.11a/g/n). Recently, it has been applied to wireless metropolitan area networks (WMANs) for fixed and mobile wireless access (e.g. 802.16- 2004 for fixed and 802.16-2005 for mobile WiMAX), fourth generation cellular wireless with Long Term Evolution (LTE) and LTE-Advanced, wireless personal area networks (WPANs) through multiband Ultra WideBand, and wireless regional area networks (WRANs) through cognitive radio (IEEE 802.22). Nowadays, during the development of 5G, flexible OFDM concepts are being discussed along with other possible waveforms. Beyond 5G technologies (like 6G) will require major upgrades for waveform to accommodate wide variety of services with various user and channel conditions. Therefore, understanding waveforms (especially OFDM-and-beyond) and the related technologies is very important for those students who seek for a career in the communications field, especially in wireless communications. This course will cover the details of various waveforms including OFDM and OFDM based technologies.

CONTENT

This course contains; Background and preparation,Multicarrier versus single carrier waveforms ,Equalization Concept,Introduction to OFDM and Multi-Carrier Modulation ,OFDM problems, Adaptive, Flexible, Cognitive OFDM,OFDM sidelobes and sidelobe reduction techniques (Spectral shaping in OFDM) ,Scheduling in OFDMA,OFDM standards and design parameters,Optimal OFDM system design for a given set of requirements ,OFDM performance measurement techniques (testing and measurement of OFDM signals) ,Other Important Waveforms Future concepts in Waveform ,Numerology and OFDM (OFDM variants from OFDM baseline), Coexistence of OFDM variants in the same frame,Simulation of OFDM and some other common waveforms in MATLAB. Performance analysis tools, measurement techniques, performance metrics and their measurements, etc.,Other things to discuss.

1. 1

   Define the relation between waveform, frame, and multiple accessing

   Taught by: Question - Answer Technique, Brainstorming Technique · Assessed by: Traditional Written Exam, Oral Exam

2. 2

   Recognize the waveform and multiple accessing history (2G, 3G, 4G waveforms, trends, relation of waveform with application, relation of waveform with bandwidth, relation of waveform with channel, etc)

   Taught by: Question - Answer Technique, Brainstorming Technique · Assessed by: Traditional Written Exam, Oral Exam

3. 3

   Evaluates orthogonal and non-orthogonal concepts (orthogonality in waveform and multiple accessing)

   Taught by: Question - Answer Technique, Brainstorming Technique · Assessed by: Traditional Written Exam, Oral Exam

4. 4

   Defines the relation of non-orthogonality with interference

   Taught by: Question - Answer Technique, Brainstorming Technique · Assessed by: Traditional Written Exam, Oral Exam

5. 5

   Does time domain equalization

   Taught by: Question - Answer Technique, Brainstorming Technique · Assessed by: Traditional Written Exam, Oral Exam

6. 6

   Defines frequency domain equalization Introduction to OFDM and Multi-Carrier Modulation

   Taught by: Question - Answer Technique, Brainstorming Technique · Assessed by: Traditional Written Exam, Oral Exam

7. 7

   Evaluates advantages of OFDM and Applications of OFDM

   Taught by: Question - Answer Technique, Brainstorming Technique · Assessed by: Traditional Written Exam, Oral Exam

8. 8

   Adaptive modulation

   Taught by: Question - Answer Technique, Brainstorming Technique · Assessed by: Traditional Written Exam, Oral Exam

9. 9

   Adaptive power

   Taught by: Question - Answer Technique, Brainstorming Technique · Assessed by: Traditional Written Exam, Oral Exam

10. 10

    Other waveforms

    Taught by: Question - Answer Technique, Brainstorming Technique · Assessed by: Traditional Written Exam, Oral Exam

WEEKLY PLAN

1. WEEK 1

   Background and preparation

2. WEEK 2

   Multicarrier versus single carrier waveforms

3. WEEK 3

   Equalization Concept

4. WEEK 4

   Introduction to OFDM and Multi-Carrier Modulation

5. WEEK 5

   OFDM problems, Adaptive, Flexible, Cognitive OFDM

6. WEEK 6

   OFDM sidelobes and sidelobe reduction techniques (Spectral shaping in OFDM)

7. WEEK 7

   Scheduling in OFDMA

8. WEEK 8

   OFDM standards and design parameters

9. WEEK 9

   Optimal OFDM system design for a given set of requirements

10. WEEK 10

    OFDM performance measurement techniques (testing and measurement of OFDM signals)

11. WEEK 11

    Other Important Waveforms Future concepts in Waveform

12. WEEK 12

    Numerology and OFDM (OFDM variants from OFDM baseline), Coexistence of OFDM variants in the same frame

13. WEEK 13

    Simulation of OFDM and some other common waveforms in MATLAB. Performance analysis tools, measurement techniques, performance metrics and their measurements, etc.

14. WEEK 14

    Other things to discuss

ASSESSMENT

• Rate of Midterm Exam to Success50%
• Rate of Final Exam to Success50%

WORKLOAD

READING

• Lecture Notes

TEACHING STAFF

• Prof.Dr. Hüseyin ARSLANCOORDINATOR
• Prof.Dr. Hüseyin ARSLAN