Hybrid polarization-division-multiplexed quadrature phase-shift keying and multi-pulse pulse position modulation for free space optical communication

2015 ◽  
Vol 334 ◽  
pp. 63-73 ◽  
Author(s):  
Wenxiao Shi ◽  
Pengxia Wu ◽  
Wei Liu
Keyword(s):  
Phase Shift ◽  
Optical Communication ◽  
Pulse Position Modulation ◽  
Free Space Optical Communication ◽  
Phase Shift Keying ◽  
Free Space Optical ◽  
Quadrature Phase Shift Keying ◽  
Quadrature Phase ◽  
Shift Keying ◽  
Space Optical Communication

DP-QPSK Technique for Ultra-high Bit-rate DWDM FSO System

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Subhrajit Pradhan ◽  
Bijayananda Patnaik ◽  
Rashmita Kumari Panigrahy
Keyword(s):  
Phase Shift ◽  
Wavelength Division Multiplexing ◽  
High Capacity ◽  
Phase Shift Keying ◽  
Bit Rate ◽  
Free Space Optical ◽  
Eye Diagram ◽  
Quadrature Phase Shift Keying ◽  
Quadrature Phase ◽  
Shift Keying

AbstractThis paper proposes an ultra-high capacity free space optical communication (FSO) system, employing optical dual polarization quadrature phase shift keying (DP-QPSK) modulation format. It is a 16-channel dense wavelength division multiplexing (DWDM) system with 120 Gbps/channel bit rate. The FSO system is analyzed with three optical advanced modulation schemes; such as 4-quadrature amplitude modulation (4-QAM), quadrature phase shift keying (QPSK) and DP-QPSK. The main focus of the projected system is to improve the FSO setup performance in terms of eye diagram, bit error rate (BER), high received power and Q-factor. The center channel wavelength used for the proposed system is 1550 nm. In the present wireless communication world, the proposed system will be highly helpful as an ultrahigh capacity wireless system.

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