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Article: Frequency-time MMSE equalizer for BER enhancement of MC-CDMA systems over mulipath fading channel.(bit error rate)(Multi-Carrier Code Division Multiple Access)(Report)
- Article from:
- International Journal of Applied Engineering Research
- Article date:
- January 1, 2007
- Author:
CopyrightCOPYRIGHT 2007 Research India Publications. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Abstract
This paper examines the performance of a multicarrier CDMA system over multipath fading channel. Due to the dispersive nature of the mobile communications channels, Multi-Carrier Code Division Multiple Access (MC-CDMA) signals will be affected by Inter Channel Interference (ICI), Inter Symbol Interference (ISI) and Multiple Access Interference (MAI), due to the loss of subcarrier orthogonality. To solve the ISI problem, a cyclic extension was introduced to the transmitted symbols, known as guard time, but its introduction results into loss of spectral efficiency. In this context, we consider the use of a Frequency-Time minimum mean square error Equalizer ...