Performance of STBC MC-CDMA systems over outdoor realistic MIMO channels

This paper deals with orthogonal Space-Time Block Coded MC-CDMA systems, in outdoor realistic downlink scenarios with up to two transmit and receive antennas. Assuming no channel state information at transmitter, we compare several linear single-user detection and spreading schemes, with or without channel coding, achieving a spectral efficiency from 1 to 2 bits/s/Hz. The different results obtained demonstrate that spatial diversity significantly improves the performance of MC-CDMA systems, and allows different chipmapping without notably decreasing performance. Moreover, the global system exhibits a good trade-off between complexity at mobile stations and performance. Then, Alamouti's STBC MCCDMA schemes derive full benefit from the frequency and spatial diversities and can be considered as a very realistic and promising candidate for the air interface downlink of the 4th generation mobile radio systems.

• Type: Journal
• Year: 2006
• Where: CORR
• Authors: Fabrice Portier, Jean-Yves Baudais, Jean-François Hélard
• Keywords: CORR 2006, Education, MC-CDMA Systems, Orthogonal Space-Time Block, Realistic Downlink Scenarios