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Erschienen in:
2010 | OriginalPaper | Buchkapitel
Frequency Domain Equalisation for OFDMA System in Multipath Fading Channels
verfasst von : R. J. Susan, Sakuntala S. Pillai
Erschienen in: Recent Trends in Networks and Communications
Verlag: Springer Berlin Heidelberg
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High speed wireless data transmission requires systems to operate with high spectral efficiency in wideband channels The physical layer should facilitate multiuser/multirate transmissions to support a number of users and applications with diverse needs. Orthogonal Frequency Division Multiple Access (OFDMA) is a multiple access technique that can accommodate many users with widely varying applications, data rates and Quality of Service requirements with increased spectral efficiency. OFDMA is attractive due to the fact that it exploits the computational efficiency associated with frequency domain equalization (FDE). This paper presents analysis of transmission of multiple data rates by using Orthogonal Variable Spreading Factor (OVSF) codes in an OFDMA system with frequency domain equalization. The performance of the system is analyzed using bit error rate (BER), for Vehicular A and Pedestrian B channel models.