Design and Performance Evaluation of Adaptive Antenna System in CDMA Transceiver Based on Fourier Signals in SUI Channels

Aboud Kadhim, Mohammed; Abbas Abed, Faeza; Mohammed Abdulwahhab, Oday

	Design and Performance Evaluation of Adaptive Antenna System in CDMA Transceiver Based on Fourier Signals in SUI Channels
Journal of Engineering and Sustainable Development
Article 1, Volume 18, Issue 4, 2014, Pages 162-175
Authors
Mohammed Aboud Kadhim; Faeza Abbas Abed; Oday Mohammed Abdulwahhab
Abstract
The Code division multiple access (CDMA) and adaptive antenna system(AAS)system are two approaches that show realpromise for increasing spectrum efficiency. In this research, we investigate the performance of AAS in the CDMA transceiver. The CDMA transceiver has been developed to adaptively correct antenna impedance mismatch.AAS has been deployed at the receiver module to reduce the fading effects caused by proposedStanford University Interim(SUI)channels model. SUI channel model proposes a set of six empirical time-dispersive channels for three typical terrain type'sAAS uses various beamforming techniques to focus the wireless beam between the base station and the subscriber station. In this work, the transmitter (SS) and receiver (BS) are fixed and AAS installed at the receiver is used to direct the main beam towards the desired LOS signal and nulls to the multipath signals. Least Mean Square (LMS) algorithm is used. It has been proved through Matlab simulations that the performance of the system significantly improves by AAS in SUI channel model has been proposed for simulations, design, development and testing of technologies suitable for CDMA transceiver. The performance of the system more increases by increasing the number of antennas at receiver.
Keywords
OFDM; CDMA; Antenna; adaptive; Beamforming; AAS

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