Title :
A novel MC-2D-CDMA communication systems and its detection methods
Author :
Xiao, Lei ; Liang, Qinglin
Author_Institution :
Inf. & Commun. Networks Group, Siemens Ltd., China
Abstract :
This paper presents a novel multicarrier-2-dimension-code division multiple access (MC-2D-CDMA) system for the forward link. Because of the full utilization of the 2-dimension spreading characteristic, the ability to reject fading and multiple access interference (MAI) is enhanced. For this system, we examine some diversity combination methods. Among them, weighted least square combination (WLSC) has better performance but is not very suitable for the forward link; auxiliary vector combination (AVC), the combination of maximum ratio combination (MRC) and orthogonality restoring correlation (ORC) is very simple and robust, and very suitable for the forward link because it does not require any prior knowledge about other users and noise. The simulation results show their validity to anti-fading and anti-MAI
Keywords :
OFDM modulation; Rayleigh channels; code division multiple access; correlation methods; diversity reception; interference suppression; least squares approximations; multiuser channels; radio links; radiofrequency interference; signal detection; spread spectrum communication; 2D spreading characteristic; MAI rejection; MC-2D-CDMA communication systems; OFDM; Rayleigh fading channel; anti-MAI; anti-fading; auxiliary vector combination; detection methods; diversity combining methods; fading rejection; forward link; maximum ratio combination; multicarrier modulation; multicarrier-2D-code division multiple access; multiple access interference rejection; orthogonality restoring correlation; simulation results; Automatic voltage control; Diversity methods; Fading; Fast Fourier transforms; Frequency diversity; Frequency division multiaccess; Multiaccess communication; Multiple access interference; Multiuser detection; Noise robustness;
Conference_Titel :
Communications, 2000. ICC 2000. 2000 IEEE International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-6283-7
DOI :
10.1109/ICC.2000.853694
