Title :
Modified frequency and phase estimation for M-QAM optical coherent detection
Author :
Cao, Yinwen ; Yu, Song ; Chen, Ying ; Gao, Yuliang ; Gu, Wanyi ; Ji, Yuefeng
Author_Institution :
Key Lab. of Inf. Photonics & Opt. Commun. (Minist. of Educ.), Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
A frequency estimation without removing modulated data phase is proposed for M-QAM coherent system. In addition, a group of weighted coefficients are introduced for M-QAM phase estimation, resulting in an increment of laser linewidth tolerance.
Keywords :
frequency estimation; optical communication; phase estimation; quadrature amplitude modulation; M-QAM optical coherent detection; frequency estimation; laser linewidth tolerance; phase estimation; Frequency estimation; Frequency modulation; Laser noise; Lasers; Phase shift keying; Sensitivity;
Conference_Titel :
Optical Communication (ECOC), 2010 36th European Conference and Exhibition on
Conference_Location :
Torino
Print_ISBN :
978-1-4244-8536-9
Electronic_ISBN :
978-1-4244-8534-5
DOI :
10.1109/ECOC.2010.5621159
