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. © 2006 IEEE.
Iterative MMSE Decoder for Trace-Orthogonal Space-Time Coding / A., Fasano; Barbarossa, Sergio. - 4:(2006). (Intervento presentato al convegno 2006 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2006 tenutosi a Toulouse; France nel May 2006) [10.1109/ICASSP.2006.1660935].
Iterative MMSE Decoder for Trace-Orthogonal Space-Time Coding
BARBAROSSA, Sergio
2006
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. © 2006 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
