Title :
Block length effect on 5.0 Gbit/s real-time QPSK intradyne receivers with standard DFB laser
Author :
Kaneda, N. ; Leven, A. ; Chen, Y.K.
Author_Institution :
Bell Labs., Murray Hill
Abstract :
For intradyne QPSK receivers, block phase estimation based on the Viterbi and Viterbi algorithm has been reported to yield better OSNR results than differential detection. When a laser with large phase noise such as a distributed feedback laser is used, typically a higher error floor is observed with block phase estimation. With shorter block length, the bit-error rate (BER) floor for a 5.0 Gbit/s real-time intradyne receiver was improved without large sacrifice in the low BER performance.
Keywords :
distributed feedback lasers; error statistics; maximum likelihood estimation; optical modulation; optical receivers; phase estimation; quadrature phase shift keying; DFB laser; OSNR; Viterbi algorithm; bit rate 5.0 Gbit/s; bit-error rate floor; block length effect; block phase estimation; differential detection; distributed feedback laser; real-time QPSK intradyne receiver;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20072192
