Title :
Low-complexity linewidth-tolerant carrier phase estimation for 64-QAM systems based on constellation transformation
Author :
Bilal, Syed Muhammad ; Bosco, Gabriella ; Poggiolini, Pierluigi ; Fludger, C.R.S.
Author_Institution :
DET, Politec. di Torino, Turin, Italy
Abstract :
A novel three-stage digital feed-forward carrier recovery algorithm based on the transformation of 64-QAM constellation into QPSK is proposed. For 1 dB penalty at BER=10-2, it can tolerate a linewidth-times-symbol-rate product of 4.5·10-5, making it possible to operate 32-Gbaud optical 64-QAM systems with current commercial tunable lasers.
Keywords :
optical modulation; phase estimation; quadrature amplitude modulation; quadrature phase shift keying; 64-QAM constellation transformation; QPSK; commercial tunable lasers; linewidth-times-symbol-rate product; low-complexity linewidth-tolerant carrier phase estimation; optical 64-QAM systems; three-stage digital feedforward carrier recovery algorithm;
Conference_Titel :
Optical Communication (ECOC 2013), 39th European Conference and Exhibition on
Conference_Location :
London
Electronic_ISBN :
978-1-84919-759-5
DOI :
10.1049/cp.2013.1595
