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Performance Evaluation of WiMAX/IEEE 802.16 OFDM Physical Layer - page 84 / 107

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Chapter 6

Conclusion and Future Work

6.1Conclusion

The key contribution of this thesis was the implementation of the IEEE 802.16 OFDM PHY layer using MATLAB in order to evaluate the PHY layer performance under reference channel model. The implemented PHY layer supports all the modulation and coding schemes as well as CP lengths defined in the specification. To keep matters simple we avoided doing over­sampling of the data samples before using the channel model. Though, that can be implemented by minor modi ications. On the receiver side, we have assumed perfect channel estimation to avoid the effect of any particular estimation method on the simulation results, though insertion of pilot subcarriers in the OFDM symbols makes use of any comb­type estimator possible. The developed simulator can be easily modi ied to implement new features in order to enhance the PHY layer performance.

Simulation was the methodology used to investigate the PHY layer performance. The performance evaluation method was mainly concentrated on the effect of channel coding

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