Space-Time Block Coding Applied to Turbo Coded Multi-carrier CDMA

Vincent Le Nir (1) , Maryline Hélard (1) , Rodolphe Le Gouable (1)

1 FT R&D - France Télécom Recherche & Développement

In this article, we combine a Space-Time Block Code (STBC) with a Multi-Carrier Code Division Multiplex Access (MC-CDMA) system and a Turbo Code (TC) as channel code. MC-CDMA is likely to be one of the most promising access technique for future wireless communication systems [1][2]. In fact, MC-CDMA exploits the advantages of both the Orthogonal Frequency Division Multiplex (OFDM) multi-carrier modulation and of the Code Division Multiple Access (CDMA) technique. Moreover, the use of a Multiple Input Multiple Output (MIMO) OFDM system associated with a STBC code allows the achievement of both space and frequency diversities [6]. In this paper, we compare several STBC codes such as the Alamouti code [3] and the generalized codes for 3 or 4 antennas proposed by Tarokh [4] applied to a MC-CDMA system leading to different spectral efficiencies. Then, since Turbo Coded MC-CDMA was demonstrated to be very efficient for a Single Input Single Output (SISO) system, allowing the use of a simple Single User (SU) detector [2], we extend this system to Multiple Input Multiple Output (MIMO) systems for different STBC. Simulation results are provided for full load systems. We provide simulation results over an uncorrelated Rayleigh flat fading channels environment for full load systems.

Domaines: Autre

Vincent Le Nir, Maryline Hélard, Rodolphe Le Gouable. Space-Time Block Coding Applied to Turbo Coded Multi-carrier CDMA. 2003, pp.1-5. ⟨hal-00007768⟩