Synchronization of turbo coded modulation systems at low SNR

This paper examines the synchronization of turbo coded modulation systems at low SNR where these systems are designed to operate. Maximum likelihood estimation theory is used to derive a causal, discrete-time synchronization structure for estimating the carrier phase and symbol timing of a general Q...

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Bibliographic Details
Published in1998 IEEE International Conference on Communications Vol. 1; pp. 428 - 432 vol.1
Main Authors Lijun Lu, Wilson, S.G.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1998
Subjects
Frequency estimation
Frequency synchronization
Matched filters
Maximum likelihood estimation
Modulation coding
Phase estimation
Quadrature amplitude modulation
Quadrature phase shift keying
Timing
Turbo codes
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Summary:This paper examines the synchronization of turbo coded modulation systems at low SNR where these systems are designed to operate. Maximum likelihood estimation theory is used to derive a causal, discrete-time synchronization structure for estimating the carrier phase and symbol timing of a general QAM signal, using a decision-directed structure which is known to be superior at low SNR. Simulation shows that efficient joint carrier phase and symbol timing estimates can be acquired using our synchronizer for turbo codes. Bit error performance for selected loop bandwidths is presented.
ISBN:0780347889
9780780347885
DOI:10.1109/ICC.1998.682888