25 June 2002 Performance evaluation of data transmission over multicarrier CDMA systems
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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.
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Feng-Tsun Chen, Chien-Hwa Hwang, Chang-Su Kim, C.-C. Jay Kuo, "Performance evaluation of data transmission over multicarrier CDMA systems", Proc. SPIE 4740, Digital Wireless Communications IV, (25 June 2002); doi: 10.1117/12.472968; https://doi.org/10.1117/12.472968
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