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Performance and analysis of adaptive modulation in MC-CDMA systems

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4 Author(s)
Guoyan Zeng ; Center of Wireless Commun., Beijing Univ. of Posts & Telecommun., China ; Kan Zheng ; Lin Huang ; Wenbo Wang

To satisfy the requirement for high data rate and high frequency efficiency in future mobile radio communication systems, an MC-CDMA system using adaptive modulation is proposed in order both to achieve frequency diversity and to maximize the spectral efficiency. We also give a practical adaptive modulation algorithm with low computational complexity and small signaling overhead, which is suitable for MC-CDMA downlink transmission. Simulation results show that adaptive MC-CDMA systems outperform conventional MC-CDMA systems. The combining schemes at the receiver in MC-CDMA systems, which affect the efficiency of the adaptive modulation algorithm, are also analyzed, including multi-user interference.

Published in:

Communications, Circuits and Systems, 2004. ICCCAS 2004. 2004 International Conference on  (Volume:1 )

Date of Conference:

27-29 June 2004

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