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Paper Detail

Paper:	SPCOM-L8.4
Session:	MIMO STC and Decoding
Time:	Friday, May 19, 17:30 - 17:50
Presentation:	Lecture
Topic:	Signal Processing for Communication: MIMO space-time code design, analysis and decoding algorithms
Title:	Iterative MMSE Decoder for Trace-Orthogonal Space-Time Coding
Authors:	Antonio Fasano, Sergio Barbarossa, University of Roma, Italy
Abstract:	Trace-orthogonality is an important property of linear space-time encoders that has emerged relatively recently. In this work we carry out the theoretical performance analysis of a low complexity decoder for Trace-Orthogonal space-time codes based on the linear MMSE estimator. We derive the diversity order of such a decoder in the case of MIMO systems affected by uncorrelated flat Rayleigh fading, when information symbols are carved from a QPSK constellation, and are encoded using what we term a Unitary Trace-Orthogonal Design. Then we propose an iterative decoder that dramatically improves the performance over the linear MMSE decoder. Simulation results give evidence of the effectiveness of the proposed scheme.