MODELLING AND ARCHITECTURE DESIGN OF WIMAX 802.16D BASEBAND PROCESSOR: IQ IMBALANCE, SYNCHRONIZER AND EQUALIZER
Among some factors that influence the performance of Wimax 802.16d baseband system are the channel characteristic, synchronization, and impairment of frontend components such as IQ imbalance and carrier frequency offset between receiver and transmitter. The problems stated above can be handled by...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/12558 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Among some factors that influence the performance of Wimax 802.16d baseband
system are the channel characteristic, synchronization, and impairment of frontend
components such as IQ imbalance and carrier frequency offset between
receiver and transmitter. The problems stated above can be handled by using IQ
imbalance compensator, synchronizer and equalizer. This thesis present IQ
imbalance using Adaptive method, synchronizer using Fine Estimation, and
equalizer using Least Square and Moving Average Update. The process of design
is started by choosing algorithm, systems modeling, hardware architecture design,
then bit precision modeling.
Performance of designed estimator module is measured from Mean Square Error
(MSE) value, while compensator module is measured from Bit Error Rate (BER)
of the system. Simulation is done in some type of channels, like AWGN, ITU and
SUI, using computing tool Matlab 7.0.
Simulation results show that the designed modules give better performance for
about 5 dB compared with receiver sensitivity requirement for AWGN channel. |
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