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Performance Evaluation of WiMAX/IEEE 802.16 OFDM Physical Layer - page 5 / 107

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    • 4.2

      Physical Layer Setup .............................................................................................................28

      • 4.2.1

        Scrambler ...........................................................................................................................29

      • 4.2.2

        Reed­Solomon Encoder..................................................................................................30

      • 4.2.3

        Convolutional Encoder ....................................................................................................30

      • 4.2.4

        Interleaver ..........................................................................................................................32

      • 4.2.5

        Constalletion Mapper.......................................................................................................32

      • 4.2.6

        IFFT .....................................................................................................................................33

      • 4.2.7

        Cyclic Prefix Insertion:.....................................................................................................33

    • 4.3

      Channel Model: .......................................................................................................................33

      • 4.3.1

        Stanford University Interim (SUI) Channel Models...................................................35

      • 4.3.2

        SUI channel models Implementation:..........................................................................39

Chapter 5: Simulation Results ...................................................................................................41

    • 5.1

      The Simulator...........................................................................................................................41

    • 5.2

      Physical layer performance results.....................................................................................42

      • 5.2.1

        Scatter Plots ......................................................................................................................42

      • 5.2.2

        BER Plots...........................................................................................................................52

      • 5.2.3

        BLER Plots.........................................................................................................................55

      • 5.2.4

        Effect of Forward Error Correction................................................................................58

      • 5.2.5

        Effect of Reed­Solomon Encoding ...............................................................................62

      • 5.2.6

        Effect of Bit interleaver ....................................................................................................66

      • 5.2.7

        Spectral Efficiency............................................................................................................71

Chapter 6: Conclusion and Future Work................................................................................73

    • 6.1

      Conclusion.................................................................................................................................73

    • 6.2

      Future Works............................................................................................................................74

Reference ..........................................................................................................................................75

Appendix............................................................................................................................................78

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