Combination of Space-Time Block Coding with MC-CDMA Technique for MIMO systems with two, three and four transmit antennas

Vincent Le Nir (1) , Jean-Michel Auffray (2) , Maryline Hélard (1) , Jean-François Hélard (2) , Rodolphe Le Gouable (1)

1 FT R&D - France Télécom Recherche & Développement
2 IETR - Institut d'Electronique et de Télécommunications de Rennes

For future wideband wireless networks, space diversity schemes relying on multiple antennas at the receiver and/or at the transmitter are very attractive to combat fadings and improve the transmission performance. In this paper, Multi-Carrier Code Division Multiple Access (MC-CDMA) technique combined with several Space-Time Block Codes (STBC) is analyzed in the case of Nt transmit antennas and Nr receive antennas to provide a diversity order of NtNr for a 2 bps/Hz spectral efficiency. A general method to decode STBC from orthogonal designs associated with MC-CDMAis proposed. Two Single-user Detection techniques, Zero Forcing (ZF) and Minimum Mean Square Error (MMSE), are studied and compared in the downlink synchronous case over frequency selective Rayleigh channels.

Domaines: Autre

Vincent Le Nir, Jean-Michel Auffray, Maryline Hélard, Jean-François Hélard, Rodolphe Le Gouable. Combination of Space-Time Block Coding with MC-CDMA Technique for MIMO systems with two, three and four transmit antennas. 2003, 5 p. ⟨hal-00005810⟩