1. Resource Allocation Software Algorithms for AMC-OFDM Systems Dr. Muayad Sadik Croock Computer Engineering Department, University of Technology 1

2. Layout Part 1: Adaptive Modulation and Coding based Orthogonal Frequency Division Multiplexing (AMC-OFDM).  Introduction.  System Model.  Developed Software Life Cycle model.  Results. Part 2: Resource Allocation (RA) for AMC-OFDMA.  Introduction.  System Model.  Designed Software Life Cycle model.  Results. Computer Engineering Department 2

3. 3 Layout Part 3: User Scheduling and RA for AMC-OFDMA.  Introduction.  System Model.  Developed Software Life Cycle model.  Results.

4.  The software engineering life cycle methodologies have been employed in the designing of advanced communication systems, in order to achieve: scalable, extendible and portable algorithms.  It is well known that the software life cycle methodologies are divided into sequential and cyclical. r  These methods exhibit the main four design phases, which are requirements engineering or analysis, design, implementation, and testing.  The life cycle methods are used to design the strategies of the following applications: 1. AMC-OFDM/OFDMA. 2. Resource allocation for AMC-OFDMA. 3. User scheduling and RA for AMC-OFDMA. Computer Engineering Department 4 General Introduction

5. Computer Engineering Department 5 Life cycle model/ Waterfall Method

6. Computer Engineering Department 6 Life cycle model/ Incremental Method

7. Computer Engineering Department 7 Life cycle model/ Evolutionary Method

8. Computer Engineering Department 8 Part 1: AMC-OFDM.

9. Introduction  Adaptive Modulation and Coding (AMC) Strategy for OFDM systems based on WiMAX standards.  Modulation and Coding Scheme (MCS).  Modulation types of 16-QAM and QPSK combined with (1/2, 2/3 and 3/4) convolutional coding rates.  Channel state information (CSI), which contains the number of sub-channels and the suitable MCSs. Computer Engineering Department 9

10. System Model Computer Engineering Department 10

11. Computer Engineering Department 11 Transmitted OFDM Frame

12. Computer Engineering Department 12 Channel Diagram

13. Channel model Computer Engineering Department 13

14. Computer Engineering Department 14 Life cycle model/ Developed AMC Strategy

15. Computer Engineering Department 15 MCS Selection

16. Computer Engineering Department 16

17. Computer Engineering Department 17 MCS Selection

18. The CSI is generated from the number of the sub- channels and the number of the suitable MCS, which is between 1 and 6 for six MCS options, for each sub- channel individually to sending back to the transmitter. MCS(1) No. MCS(2) No. ------ MCS(N coh ) No. Computer Engineering Department 18

19. Results The Mobile WiMAX system parameters Computer Engineering Department 19

20. Results/ Results/ Throughput Computer Engineering Department 20

21. Results/ Results/ Spectral Efficiency Computer Engineering Department 21

22. Computer Engineering Department 22 Part 2: RA for AMC-OFDMA.

23. Introduction  Cross-layer resource allocation (RA) for AMC- OFDMA systems.  Resources include Power, information streams and users.  Modulation and Coding Scheme (MCS).  Optimization methods. Computer Engineering Department 23

24. Computer Engineering Department 24 System Model

25. Computer Engineering Department 25 Life cycle model/ Developed RA Strategy

26. Computer Engineering Department 26 Problem Formulation

27. Computer Engineering Department 27 Results/ Results/ Throughput

28. Computer Engineering Department 28 Results/ Results/ MCS selction statistics

29. Computer Engineering Department 29 Part 3: User Scheduling and RA for AMC-OFDMA.

30. Introduction  Cross-layer scheduling and resource allocation strategies that work across the open system interconnection (OSI) layers.  Scheduling and resource allocation for AMC- OFDMA systems.  Modulation and Coding Scheme (MCS).  Optimization methods. Computer Engineering Department 30

31. System Model Computer Engineering Department 31

32. Computer Engineering Department 32 System Model/ Developed user scheduling and RA Strategy

33. Computer Engineering Department 33 Problem Formulation

34. Results/ Results/ Throughput Computer Engineering Department 34

35. Results/ Results/ Throughput vs. No Queues EECE 14 28/09/2010 Computer Engineering Department 35

36. Thank you Computer Engineering Department 36