Title :
Fast method for Q factor estimation in delay line demodulated DPSK optical communications systems
Author :
Avlonitis, Nikolaos S. ; Tomkos, Ioannis
Author_Institution :
Athens Inf. Technol. (AIT) Center, Peania, Greece
fDate :
June 28 2009-July 2 2009
Abstract :
We derive a differential Q factor model for DPSK signals detected by delay line demodulators. The parameters involved in the model are related to signal characteristics such as phase noise linewidth, OSNR and power fluctuations, and can therefore be directly monitored from it. Moreover, its validity is tested and confirmed under various phase noise and amplitude fluctuations scenarios. In addition, performance bounds based on phase noise levels can also be derived from the model The simplicity of this fast model constitutes it a potential candidate for performance evaluation of DPSK systems, which is of interest for optical routing algorithms.
Keywords :
Q-factor; demodulators; differential phase shift keying; error analysis; error statistics; optical communication equipment; optical delay lines; phase noise; DPSK; OSNR; amplitude fluctuation; bit-error-rate analysis; delay line demodulators; differential Q factor model; differential phase shift keying; optical communications systems; optical routing algorithms; phase noise fluctuation; phase noise linewidth; power fluctuation; Delay estimation; Delay lines; Differential quadrature phase shift keying; Fluctuations; Optical fiber communication; Optical noise; Phase noise; Power system modeling; Q factor; Signal detection; bit-error-rate (BER) analysis; differential phase shift keying (DPSK); optical communications;
Conference_Titel :
Transparent Optical Networks, 2009. ICTON '09. 11th International Conference on
Conference_Location :
Azores
Print_ISBN :
978-1-4244-4825-8
Electronic_ISBN :
978-1-4244-4827-2
DOI :
10.1109/ICTON.2009.5185327
