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Title: Novel QPSK modulation technique for DWDM free space optical communication system
Authors: Patnaik B.
Sahu P.K.
Keywords: bit error rate
coherent optical quadrature phase shift keying modulation
dense wave length division multiplexing
Free-space optical communication
Issue Date: 2012
Abstract: A novel 1.28Tbps dense wave length division multiplexing system for free-space optical communication is proposed. The system is a line-of-sight configuration and uses 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, eye opening etc. For an input power level of 10dBm and employing coherent optical QPSK modulation technique, the coverage distance observed is 1360km. � 2012 IEEE.
Appears in Collections:Research Publications

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