DocumentCode :
2573263
Title :
A maximum-likelihood based feedback carrier synchronizer for turbo-coded systems
Author :
Noels, Nele ; Steendam, Heidi ; Moeneclaey, Marc ; Bruneel, Herwig
Author_Institution :
Dept. of Telecommun. & Inf. Process., Ghent Univ., Belgium
Volume :
5
fYear :
2005
fDate :
30 May-1 June 2005
Firstpage :
3014
Abstract :
This contribution considers the estimation of a time-varying carrier phase from coded signals at low operating SNR. ML estimation theory is used to derive an iterative code-aided feedback phase-tracker that is well suited for application in receivers with iterative MAP detection. Simulation results for a turbo-coded system indicate that, in the presence of carrier frequency offsets and phase noise that cannot be handled by a feedforward synchronizer, the proposed synchronizer yields only a small BER degradation as compared to a perfectly synchronized receiver.
Keywords :
error statistics; feedback; iterative decoding; maximum likelihood detection; phase estimation; synchronisation; turbo codes; BER; feedback carrier synchronizer; feedforward synchronizer; iterative MAP detection; iterative code-aided feedback phase-tracker; maximum-likelihood method; phase noise; time-varying carrier phase coded signals; turbo-coded system; turbo-coded systems; Estimation theory; Feedback; Frequency synchronization; Maximum likelihood detection; Maximum likelihood estimation; Phase detection; Phase estimation; Phase noise; Signal to noise ratio; Turbo codes; Carrier synchronization; codes; phase locked loops;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
ISSN :
1550-2252
Print_ISBN :
0-7803-8887-9
Type :
conf
DOI :
10.1109/VETECS.2005.1543900
Filename :
1543900
Link To Document :
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