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Proceedings Paper

Performance evaluation of data transmission over multicarrier CDMA systems
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Paper Abstract

The performances of direct sequence-code division multiple access (DS-CDMA), multicarrier-CDMA (MC-CDMA) and multicarrier-direct sequence-CDMA (MC-DS-CDMA) systems under different channel conditions are compared in this work. In a frequency-selective slowly fading channel, MC-CDMA and MC-DS-CDMA outperform DS-CDMA, since the former two systems partition the frequency band into sub-channels, each of which has a nearly constant frequency response. Thus, MC-CDMA and MC-DS-CDMA do not suffer much from the multipath effect. The performance of MC-CDMA and MC-DS-CDMA can be further differentiated in severe fading conditions. In a frequency-selective fast fading channel, the larger spreading ratio of MC-DS-CDMA in the time domain prevents the chip duration of a sub-carrier from being longer than the channel coherence time. Hence, the sub-carrier orthogonality is maintained in MC-DS-CDMA, leading to its better performance in this case.

Paper Details

Date Published: 25 June 2002
PDF: 11 pages
Proc. SPIE 4740, Digital Wireless Communications IV, (25 June 2002); doi: 10.1117/12.472968
Show Author Affiliations
Feng-Tsun Chen, Univ. of Southern California (United States)
Chien-Hwa Hwang, Univ. of Southern California (United States)
Chang-Su Kim, Seoul National Univ. (South Korea)
C.-C. Jay Kuo, Univ. of Southern California (United States)

Published in SPIE Proceedings Vol. 4740:
Digital Wireless Communications IV
Raghuveer M. Rao; Soheil A. Dianat; Michael D. Zoltowski, Editor(s)

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