Blind turbo receivers with fast least-squares channel estimation and soft-feedback equalisation

Blind turbo receivers with fast least-squares channel estimation and soft-feedback equalisation

Low-complexity blind turbo receivers composed of a soft-feedback equaliser (SFE) and fast least-squares (FLS) channel estimators are proposed. To reduce the complexity of the SFE computation, a function approximation is proposed instead of numerical algorithms in a specific step of the equaliser...

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Veröffentlicht in:Electronics letters 2010-10, Vol.46 (21), p.1-1
Hauptverfasser: Loiola, M B, Lopes, R R, Romano, J M T
Format: Artikel
Sprache:eng
Schlagworte:
Blinds
Channels
Computation
Estimators
Least squares method
Mathematical analysis
Mathematical models
Receivers
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Lopes, R R
Romano, J M T
description Low-complexity blind turbo receivers composed of a soft-feedback equaliser (SFE) and fast least-squares (FLS) channel estimators are proposed. To reduce the complexity of the SFE computation, a function approximation is proposed instead of numerical algorithms in a specific step of the equaliser's computation. Concerning FLS channel estimators, a specific filter parameters initialisation procedure is proposed in each turbo iteration to avoid possible numerical instabilities. The estimation of noise variance is also considered. The proposed scheme can perform as the turbo equaliser with perfect channel knowledge from a certain signal-to-noise ratio.
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source Alma/SFX Local Collection
subjects Blinds
Channels
Computation
Estimators
Least squares method
Mathematical analysis
Mathematical models
Receivers
title Blind turbo receivers with fast least-squares channel estimation and soft-feedback equalisation
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