Title :
Efficient Spreading Code Allocation Strategy for a Downlink MC-CDMA System in a Time Varying Frequency Selective Channel
Author :
Ghazi, H.E. ; Garnier, Christelle ; Delignon, Yves
Author_Institution :
IEMN-DOAE, UMR CNRS, Villeneuve d´´Ascq
Abstract :
In this paper, we investigate the impact of Walsh-Hadamard spreading code allocation on the performance of a downlink MC-CDMA system in a time varying frequency selective channel. The analysis shows that this impact is important on the multiple access interference and the inter-carrier interference power levels. We propose a code allocation strategy that minimizes the global interference power and significantly improves the performance of the MC-CDMA system
Keywords :
Hadamard codes; Rayleigh channels; code division multiple access; radiofrequency interference; time-varying channels; Walsh-Hadamard spreading code allocation; downlink MC-CDMA system; global interference power; inter-carrier interference power levels; multi-carrier code division multiple access; multiple access interference; time varying frequency selective channel; Downlink; Frequency domain analysis; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; OFDM; Power system modeling; Radio spectrum management; Time varying systems; Transmitters; Multi-Carrier CDMA; Walsh-Hadamard codes; code allocation strategy; frequency selective fading; time varying channel;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
1-4244-0329-4
Electronic_ISBN :
1-4244-0330-8
DOI :
10.1109/PIMRC.2006.254362
