Title :
Laser linewidth tolerance of coherent optical 64QAM and 16PSK systems using decision-aided maximum likelihood phase estimation
Author :
Zhang, Hongyu ; Kam, Pooi-Yuen ; Yu, Changyuan
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
The exact bit-error rate of 64-quadrature amplitude modulation (64QAM) is derived. By using decision-aided maximum likelihood phase estimation, it is found that 64QAM has almost the same laser linewidth tolerance as 16-phase-shift keying.
Keywords :
error statistics; light coherence; maximum likelihood estimation; optical fibre communication; optical modulation; phase estimation; phase shift keying; quadrature amplitude modulation; spectral line breadth; bit-error rate; coherent optical 16PSK; coherent optical 64QAM; decision-aided maximum likelihood phase estimation; laser linewidth tolerance; phase-shift keying; quadrature amplitude modulation; Adaptive optics; Bit error rate; Laser noise; Lasers; Modulation; Optical transmitters; Signal to noise ratio;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2011 Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4577-1223-4
