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Resource Allocation Software Algorithms for AMC-OFDM Systems Dr. Muayad Sadik Croock Computer Engineering Department, University of Technology 1
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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
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3 Layout Part 3: User Scheduling and RA for AMC-OFDMA. Introduction. System Model. Developed Software Life Cycle model. Results.
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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
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Computer Engineering Department 5 Life cycle model/ Waterfall Method
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Computer Engineering Department 6 Life cycle model/ Incremental Method
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Computer Engineering Department 7 Life cycle model/ Evolutionary Method
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Computer Engineering Department 8 Part 1: AMC-OFDM.
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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
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System Model Computer Engineering Department 10
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Computer Engineering Department 11 Transmitted OFDM Frame
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Computer Engineering Department 12 Channel Diagram
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Channel model Computer Engineering Department 13
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Computer Engineering Department 14 Life cycle model/ Developed AMC Strategy
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Computer Engineering Department 15 MCS Selection
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Computer Engineering Department 16
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Computer Engineering Department 17 MCS Selection
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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
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Results The Mobile WiMAX system parameters Computer Engineering Department 19
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Results/ Results/ Throughput Computer Engineering Department 20
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Results/ Results/ Spectral Efficiency Computer Engineering Department 21
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Computer Engineering Department 22 Part 2: RA for AMC-OFDMA.
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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
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Computer Engineering Department 24 System Model
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Computer Engineering Department 25 Life cycle model/ Developed RA Strategy
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Computer Engineering Department 26 Problem Formulation
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Computer Engineering Department 27 Results/ Results/ Throughput
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Computer Engineering Department 28 Results/ Results/ MCS selction statistics
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Computer Engineering Department 29 Part 3: User Scheduling and RA for AMC-OFDMA.
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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
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System Model Computer Engineering Department 31
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Computer Engineering Department 32 System Model/ Developed user scheduling and RA Strategy
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Computer Engineering Department 33 Problem Formulation
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Results/ Results/ Throughput Computer Engineering Department 34
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Results/ Results/ Throughput vs. No Queues EECE 14 28/09/2010 Computer Engineering Department 35
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Thank you Computer Engineering Department 36
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