Turbo equalization for block fading MIMO channels using random signal mapping

Authors:
Richard Demo Souza;Javier Garcia-Frias;Renato da Rocha Lopes
Affiliations:
Eletronics Department (DAELN) and the Graduate School of Electrical Engineering (CPGEI), Federal Technological University of Paraná (UTFPR), Curitiba-PR, Brazil;Department of Electrical and Computer Engineering, University of Delaware, Newark, DE, USA;Communications Department (DECOM), School of Electrical and Computer Engineering (FEEC), State University of Campinas (UNICAMP), Campinas-SP, Brazil
Venue:
Computers and Electrical Engineering
Year:
2007

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Abstract

We present a novel turbo equalization scheme for block fading MIMO channels, where diversity is achieved using random signal mapping. We show that the computational complexity of the proposed scheme is not a function of the number of transmit antennas, and compares favorably to the complexity of similar systems based on space-time trellis codes and space-time block codes. Finally, we provide simulation results showing that the proposed scheme achieves full diversity, and investigate its performance in terms of the number of transmit antennas, ISI length and imperfect channel knowledge.