Title :
Interference Suppression in MC-CDMA Systems by Joint Transceiver Design
Author :
Seo, Kyoungnam ; Yang, Liuqing
Author_Institution :
Dept. of Electr. & Comput. Eng., Florida Univ., Gainesville, FL
Abstract :
Multi-carrier code division multiple access (MC-CDMA) systems are well suited for high data rate wireless multimedia services due to their capability of converting the frequency-selective fading channels to distinct frequency-flat ones with low-complexity fast Fourier transform (FFT) devices. However, in multiuser MC-CDMA systems, the frequency selectivity and variation of the users´ geographical locations give rise to the multiuser interference (MUI) which induces a significant performance degradation of the systems. In order to mitigate MUI, we present a joint interference suppression algorithm of transmitter power control, receiver array processing and multiuser detection. In addition to the interference suppression using this algorithm, the frequency selectivity also provides multipath diversity if appropriately exploited. Simulations confirm the outstanding performance improvement of this algorithm compared with existing alternatives in MC-CDMA systems, and also confirm that the algorithm performs better in frequency-selective fading channels than in frequency-flat fading ones due to the multipath diversity
Keywords :
code division multiple access; diversity reception; fading channels; fast Fourier transforms; interference suppression; multimedia communication; multipath channels; multiuser detection; radiofrequency interference; transceivers; FFT; MC-CDMA; MUI; fast Fourier transform device; frequency selectivity; frequency-selective fading channel; geographical location; high data rate wireless multimedia services; interference suppression algorithm; multicarrier code division multiple access systems; multipath diversity; multiuser detection; multiuser interference; receiver array processing; transceiver design; transmitter power control; Degradation; Fast Fourier transforms; Frequency conversion; Frequency diversity; Frequency-selective fading channels; Interference suppression; Multicarrier code division multiple access; Multimedia systems; Transceivers; Transmitters;
Conference_Titel :
Military Communications Conference, 2006. MILCOM 2006. IEEE
Conference_Location :
Washington, DC
Print_ISBN :
1-4244-0617-X
Electronic_ISBN :
1-4244-0618-8
DOI :
10.1109/MILCOM.2006.302012
