Title :
Carrier phase tracking from turbo and LDPC coded signals affected by a frequency offset
Author :
Nele, N. ; Heidi, S. ; Moeneclaey, Marc
Author_Institution :
Dept. of Telecommun. & Inf. Process., Ghent Univ., Belgium
Abstract :
This contribution considers carrier phase estimation from coded signals, affected by a frequency offset at low operating signal-to-noise ratio (SNR). We derive a maximum likelihood (ML) based iterative code-aided feedback phase-tracker suited for receivers with iterative maximum-a-posteriori (MAP) detection. Simulations indicate that the proposed synchronizer is considerably more robust against frequency offsets than a feedforward synchronizer.
Keywords :
iterative decoding; maximum likelihood decoding; maximum likelihood detection; parity check codes; phase estimation; synchronisation; turbo codes; LDPC coded signal; MAP; carrier phase estimation; frequency offset; iterative code-aided feedback phase-tracker; iterative maximum-a-posteriori detection; linear density parity check code; maximum likelihood decoding; receiver; synchronization; turbo code; Feedback; Frequency estimation; Frequency synchronization; Maximum likelihood detection; Maximum likelihood estimation; Parity check codes; Phase detection; Phase estimation; Robustness; Signal to noise ratio;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2005.10020
