Title :
Another turbo-something : Carrier synchronization
Author :
Giugno, Luca ; Lottici, Vincenzo ; Luise, Marco
Author_Institution :
Dipt. Ing. Inf., Univ. of Pisa, Pisa, Italy
Abstract :
We introduce in this paper a low-complexity joint carrier frequency and phase recovery algorithm for coherent detection/decoding of a turbo-coded 16-QAM signal. The estimator (which can be actually applied to any linear modulation scheme) is based on a pseudo-Maximum Likelihood (ML) approach, and unlike previously published works, makes iterative use of soft decisions provided by the SISO (Soft-In Soft-Out) decoders within the overall iterative turbo decoding scheme, yielding negligible degradation with respect to ideal carrier synchronization. Performance in terms of mean estimated value, mean-squared estimation error, and overall decoder Bit Error Rate (BER) as derived by simulation are also reported.
Keywords :
error statistics; iterative decoding; maximum likelihood decoding; mean square error methods; quadrature amplitude modulation; synchronisation; turbo codes; BER; ML approach; SISO; SISO decoder; bit error rate; carrier synchronization; coherent decoding; coherent detection; iterative turbo decoding scheme; joint carer frequency and phase recovery algorithm; linear modulation scheme; mean estimated value; mean squared estimation error; pseudo-maximum likelihood approach; soft decision; soft-in soft-out decoder; turbo coded QAM signal; Abstracts; Estimation; Frequency estimation; Impedance matching; Joints;
Conference_Titel :
Signal Processing Conference, 2002 11th European
Conference_Location :
Toulouse
