Title :
Novel QPSK modulation for DWDM free space optical communication system
Author :
Patnaik, Bijayananda ; Sahu, P.K.
Author_Institution :
Int. Inst. of Inf. Technol., Bhubaneswar, India
Abstract :
A novel 1.28Tbps dense wave length division multiplexing system for free-space optical communication is proposed here. It is a line-of-sight system and uses novel coherent optical quadrature phase shift keying (QPSK) modulation technique. The system consists of 32-channels with bit-rate of 40-Gbps/channel and adjacent channel spacing of 200GHz. The system is analyzed for various modulation formats such as return-to-zero, non-return-to-zero and coherent optical QPSK modulation technique. The performance of the proposed system is analyzed in terms of bit error rate, Q-factor and eye opening etc. For an input power level of 10dBm, the coverage distance observed for the system is 1360km, for coherent optical QPSK modulation technique.
Keywords :
Q-factor; error statistics; optical communication; optical modulation; quadrature phase shift keying; wavelength division multiplexing; DWDM free space optical communication system; Q-factor; adjacent channel spacing; bit error rate; bit rate 1.28 Tbit/s; coherent optical QPSK modulation technique; coherent optical quadrature phase shift keying modulation technique; dense wavelength division multiplexing system; distance 1360 km; eye opening; frequency 200 GHz; line-of-sight system; nonreturn-to-zero modulation format; return-to-zero modulation format; Adaptive optics; Optical distortion; Optical modulation; Optical receivers; Optical transmitters; Phase shift keying; Free-space optical communication; Q-factor; bit error rate; coherent optical quadrature phase shift keying; dense wave length division multiplexing;
Conference_Titel :
Wireless Advanced (WiAd), 2012
Conference_Location :
London
Print_ISBN :
978-1-4577-2193-9
DOI :
10.1109/WiAd.2012.6296557
