Paper Info
Title
A theoretical framework for soft-information-based synchronization in iterative (Turbo) receivers
Abstract
This contribution considers turbo synchronization, that is to say, the use of soft data information to estimate parameters like carrier phase, frequency, or timing offsets of a modulated signal within an iterative data demodulator. In turbo synchronization, the receiver exploits the soft decisions computed at each turbo decoding iteration to provide a reliable estimate of some signal parameters. The aim of our paper is to show that such "turbo-estimation" approach can be regarded as a special case of the expectation-maximization (EM) algorithm. This leads to a general theoretical framework for turbo synchronization that allows to derive parameter estimation procedures for carrier phase and frequency offset, as well as for timing offset and signal amplitude. The proposed mathematical framework is illustrated by simulation results reported for the particular case of carrier phase and frequency offsets estimation of a turbo-coded 16-QAM signal.
Year
DOI
Venue
2005
10.1155/WCN.2005.117
EURASIP J. Wireless Comm. and Networking
Keywords
Field
DocType
16-qam signal,frequency offsets estimation,parameter estimation.,modulated signal,signal amplitude,signal parameter,and phrases: turbo synchronization,iterative data demodulator,turbo synchronization,general theoretical framework,iterative detection,soft-information-based synchronization,carrier phase,turbo decoding iteration,turbo codes,parameter estimation,turbo code
Turbo,Demodulation,Synchronization,Quadrature amplitude modulation,Computer science,Iterative method,Frequency offset,Turbo code,Real-time computing,Turbo equalizer
Journal
Volume
Issue
ISSN
2005
2
1687-1499
Citations 
PageRank 
References 
52
2.47
16
Authors
7
Name
Order
Citations
PageRank
Nele Noels117719.08
Vincenzo Lottici219323.55
Antoine Dejonghe330930.25
Heidi Steendam442348.24
Marc Moeneclaey556696.31
Marco Luise652752.03
Luc Vandendorpe71611160.74