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Performance Evaluation of WiMAX/IEEE 802.16 OFDM Physical Layer - page 6 / 107

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List of Figures

Figure 2.1: IEEE 802.16 Protocol Stack ........................................................................................9 Figure 2.2: A typical IEEE 802.16 Network.................................................................................10 Figure 2.3 : Application scenario ...................................................................................................12 Figure 3.1: Block diagram of a generic MCM transmitter. .......................................................21 Figure 3.2: Comparison between conventional FDM and OFDM [21]..................................21 Figure 3.3:Basic OFDM transmitter and receiver ......................................................................23 Figure 3.4 : Cyclic Prefix in OFDM................................................................................................24 Figure 4.1Simulation Setup ............................................................................................................29 Figure 4.2:Channel Encoding Setup.............................................................................................29 Figure 4.3:Channel Decoding Setup ............................................................................................29 Figure 4.4: PRBS generator for randomization..........................................................................30 Figure 4.5: Convolutional encoder of rate ½ ..............................................................................31 Figure 5.1:Scatter Plots for BPSK modulation (RS­CC 1/2) in SUI­1 channel model.......43 Figure 5.2: Scatter Plots for QPSK modulation (RS­CC 1/2) in SUI­1 channel model....44 Figure 5.3: Scatter Plots for QPSK modulation (RS­CC 3/4) in SUI­1 channel model .....45 Figure 5.4: Scatter Plots for 16­QAM modulation (RS­CC 1/2) in SUI­1 channel model .46 Figure 5.5: Scatter Plots for 16­QAM modulation (RS­CC 3/4) in SUI­1 channel model .47 Figure 5.6: Scatter Plots for 64­QAM modulation (RS­CC 2/3) in SUI­1 channel model .48 Figure 5.7: Scatter Plots for 64­QAM modulation (RS­CC 3/4) in SUI­1 channel model .49 Figure 5.8: Scatter Plots for 64­QAM modulation (RS­CC 2/3) in different SUI channel model ...................................................................................................................................................50 Figure 5.9: Scatter plot for 16­QAM with different CP length on SUI­5 channel model ....51 Figure 5.10: BER vs. SNR plot for different coding profiles on SUI­1 channel ...................52 Figure 5.11: BER vs. SNR plot for different coding profiles on SUI­2 channel ...................53 Figure 5.12: BER vs. SNR plot for different coding profiles on SUI­3 channel ...................53 Figure 5.13: BER vs. SNR plot for 16­QAM 1/2 on different SUI channel ...........................55 Figure 5.14: BLER vs. SNR plot for different modulation and coding profile on SUI­1.....56 Figure 5.15: BLER vs. SNR plot for different modulation and coding profile on SUI­2.....56 Figure 5.16: BLER vs. SNR plot for different modulation and coding profile on SUI­3.....57 Figure 5.17: BLER vs. SNR plot for 64­QAM 2/3 modulation and coding profile on different SUI channel........................................................................................................................58 Figure 5.18: Effect of FEC in QPSK 1/2 on SUI­3 channel model .......................................59

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