Tensor-based Space-Time Multiplexing (TSTM) for MIMO-OFDM Systems: Receiver Algorithms and Performance Evaluation

André L. F. de Almeida, Gérard Favier, João César Moura Mota

DOI: 10.14209/sbrt.2007.31271

Evento: XXV Simpósio Brasileiro de Telecomunicações (SBrT2007)

Keywords: Algoritmo dos minimos quadrados alternados detecção cega sistemas MIMO-OFDM multiplexagem espaço-temporal modelagem tensorial

Abstract

In a recent work [3], we have proposed a new space- time multiplexing technique for Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) wireless communication systems. The so-called Tensor-based Space-Time-Multiplexing (TSTM) technique combines multi- stream orthogonal spatial multiplexing with space-time spreading and relies on a tensor modeling of the transmitted and received signals. Based on this model, a blind separation/detection of the transmitted data streams is achieved by means of the Alternating Least Squares (ALS) algorithm. In this paper, we study the receiver performance of the TSTM technique. Focusing on a more practical MIMO-OFDM setting, we consider Pilot-Assisted Channel Estimation (PACE) in conjunction with the ALS-based receiver. A adaptation of the ALS receiver for time-varying channels is proposed. In order to further evaluate the merits of the TSTM transceivers, we situate its performance with respect to those of classical MIMO schemes such as Spatial Multiplexing (SM) and Orthogonal Transit Diversity (OTD) by means of computer simulation results.

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