Title :
An adaptive modulation algorithm for multicarrier DS/CDMA systems
Author :
Zhao, Yahong ; Dong, Mingke ; Wu, Weiling
Author_Institution :
Beijing Univ. of Posts & Telecommun., China
fDate :
6/24/1905 12:00:00 AM
Abstract :
An adaptive modulation algorithm is proposed in this paper to improve the performance of the multicarrier DS/CDMA system where no frequency diversity is available and no bandwidth efficiency loss meanwhile. In our algorithm only repetitive comparison operation is need to accomplish the allocation work, and no repetitive division operation needed; this feature makes it very appropriate for engineering implementation. Simulation results demonstrate that great performance improvement can be achieved in this adaptive modulated system.
Keywords :
adaptive modulation; bandwidth allocation; code division multiple access; mobile radio; spread spectrum communication; adaptive modulation; allocation; multicarrier DS-CDMA system; performance; repetitive comparison operation; Adaptive systems; Bandwidth; Binary phase shift keying; Filters; Frequency diversity; Multiaccess communication; Performance loss; Phase modulation; Quadrature phase shift keying; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th
Print_ISBN :
0-7803-7484-3
DOI :
10.1109/VTC.2002.1002946
