Multiplexed Is-OWC system design using advanced modulation techniques

In the present scenario, tremendous growth and progress in wireless communication applications are found. To support these multimedia services; large bandwidth, higher spectral efficiency, high data rate systems are highly essential. For achieving all these, robust and secure wireless network is required. However, the bandwidth limitation and expenditure incurred for radio frequency (RF) spectrum is not a viable option. The promising solution is optical wireless communication or OWC systems. Inter satellite links (ISL) is one such OWC system, where communication between satellites are done through laser technology and is called as Inter-satellite optical wireless communication (Is-OWC) system. The proposed Is-OWC system is designed and analysed using superior modulation techniques such as Differential Phase Shift Keying (DPSK), Dual Polarization Quadrature Amplitude Modulation (DP-QAM) and Dual Polarization Quadrature Phase Shift Keying (DP-QPSK). It is observed that DP-QPSK performs has been improved compared to DPSK and DP-QAM in terms of bit error rate (BER), link distance, input power, receiver aperture diameter and Q-factor. The proposed scheme will be very much helpful for advanced 5G wireless communication applications.