Title :
Performance and analysis of adaptive modulation in MC-CDMA systems
Author :
Guoyan Zeng ; Kan Zheng ; Lin Huang ; Wenbo Wang
Author_Institution :
Center of Wireless Commun., Beijing Univ. of Posts & Telecommun., China
Abstract :
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.
Keywords :
adaptive modulation; code division multiple access; computational complexity; diversity reception; mobile radio; optimisation; radio receivers; telecommunication signalling; MC-CDMA systems; adaptive modulation; computational complexity; data rate; downlink; frequency diversity; frequency efficiency; mobile radio communication systems; receiver combining schemes; signaling overhead; spectral efficiency maximization; Adaptive systems; Algorithm design and analysis; Computational complexity; Computational modeling; Downlink; Frequency diversity; Interference; Land mobile radio; Multicarrier code division multiple access; Performance analysis;
Conference_Titel :
Communications, Circuits and Systems, 2004. ICCCAS 2004. 2004 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
0-7803-8647-7
DOI :
10.1109/ICCCAS.2004.1346024
