Title :
Performance comparison of different 8QAM constellations for the use in flexible optical networks
Author :
Nolle, M. ; Frey, Felix ; Elschner, Robert ; Schmidt-Langhorst, Carsten ; Napoli, Antonio ; Schubert, Colja
Author_Institution :
Fraunhofer Inst. for Telecommun., Heinrich Hertz Inst., Berlin, Germany
Abstract :
We investigate the influence of DAC resolution and pulse shaping on the system performance of different 8QAM constellations. Furthermore, we experimentally show that a circular constellation outperforms the commonly used 8QAM constellation by 0.7 dB in terms of OSNR sensitivity at a BER of 3.8·10-3.
Keywords :
digital-analogue conversion; optical fibre networks; optical modulation; quadrature amplitude modulation; telecommunication standards; 8QAM constellation; BER; DAC resolution; OSNR sensitivity; flexible optical network; gain 0.7 dB; pulse shaping; Bit error rate; Modulation; Optical filters; Optical noise; Optical transmitters; Signal resolution; Signal to noise ratio;
Conference_Titel :
Optical Fiber Communications Conference and Exhibition (OFC), 2014
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-5575-2994-7
DOI :
10.1364/OFC.2014.M2B.1
