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Improvement In The Performance Of 3G Wireless Communications Systems Using An ICA Based Signal Processing Block

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Improvement In The Performance Of 3G Wireless Communications Systems Using An ICA Based Signal Processing Block

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Title: Improvement In The Performance Of 3G Wireless Communications Systems Using An ICA Based Signal Processing Block
Author: Dsouza, Winston
Abstract: In this thesis, we have implemented a signal processing block in the receiver of a third generation (3G) cellular system to provide improvement in the quality of service. Each block of the cellular system, including the complete transmitter, channel and the receiver is implemented in Matlab. The multiplexing scheme is implemented using wideband code division multiple access (WCDMA). The signal processing block is based on the concept of independent component analysis (ICA), and a rake receiver is used at the receiver to mitigate inter symbol interference due to the multi-paths. The signal processing block (SPB) is further extended to a High Speed Downlink Packet Access System (HSDPA), whose downlink physical layer is implemented in Matlab. The simulation is run in Matlab for a thousand frames containing different information bits, and under different channel conditions to prove that the system works for all possible cases in accordance with a Monte Carlo simulation. Performance analysis is accomplished by calculating the bit error rate between the transmitted and received data. Two different calculations are performed, one with the signal processing block in place and the other without, and a comparison is made using a SNR (signal to noise ratio) vs. BER (bit error rate) plot. Further, to extend the importance of the system to data applications, frame error rate calculation is also carried out, and a similar comparison made. Finally, we have been able to conclude, that the performance of the 3G wireless system with the signal processing block is better than the one without it. This confirms the earlier results which were proved for second generation systems. [1, 2]
URI: http://hdl.handle.net/10106/6174
Date: 2011-10-11

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