Title :
Compensation of quadrature imbalance in an optical 16-QAM digital coherent receiver
Author :
Faruk, Md Saifuddin
Author_Institution :
Dept. of Electr. & Electron. Eng., Dhaka Univ. of Eng. & Technol., Gazipur, Bangladesh
Abstract :
In this paper, the impact of quadrature imbalance (QI) is analyzed for an optical 16-quadrature amplitude modulation (16-QAM) transmission system that employs digital coherent receivers. A compensation method for QI in digital domain is demonstrated using four real-valued filters connected in butterfly configurations and adapted by decision-directed least-mean-square (DD-LMS) algorithm. The effectiveness of the proposed QI compensation scheme is verified by numerical simulations.
Keywords :
filtering theory; least mean squares methods; optical modulation; optical receivers; quadrature amplitude modulation; butterfly configurations; decision-directed least mean square; digital coherent receiver; optical 16-QAM; quadrature imbalance compensation; real-valued filters; Phase shift keying; Quadrature amplitude modulation;
Conference_Titel :
Computer and Information Technology (ICCIT), 2011 14th International Conference on
Conference_Location :
Dhaka
Print_ISBN :
978-1-61284-907-2
DOI :
10.1109/ICCITechn.2011.6164847
