Performance of space-time-frequency block-coded MC-DS-CDMA in correlated conditions

Authors:
D. J. Basilio;K. P. Mare;B. T. Maharaj
Affiliations:
Department of Electrical, Electronic and Computer Engineering, University of Pretoria, Pretoria, South Africa;Department of Electrical, Electronic and Computer Engineering, University of Pretoria, Pretoria, South Africa;Department of Electrical, Electronic and Computer Engineering, University of Pretoria, Pretoria, South Africa
Venue:
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Year:
2009

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Abstract

In this paper, we propose a downlink multi-antenna multi-carrier direct-sequence code division multiple access (MCDS-CDMA) transmission scheme, incorporating space-time-frequency block (STFB) codes. The proposed scheme achieves time, frequency and spatial diversity using non-redundant algebraic constellation precoders. We simulate the proposed system's bit-error-rate (BER) performance in a statistically accurate multiple-input multiple-output (MIMO) channel model, capable of simulating spatially-selective, frequency-selective and time-selective channel conditions. We evaluate the system's performance when antenna correlation is introduced. Simulation results reveal that broadband MC-DS-CDMA using STFB codes, constitutes a promising downlink transmission scheme.