Abstract

We propose a threshold-based multiple optical signal selection scheme (TMOS) for free-space optical wavelength division multiplexing systems. With this scheme, we can obtain higher spectral efficiency while reducing the possible complexity of implementation caused by the beam-selection scheme and without a considerable performance loss. To characterize the performance of our scheme, we statistically analyze the operation characteristics under conventional detection conditions (i.e., heterodyne detection and intensity modulation/direct detection techniques) with log-normal turbulence while taking into consideration the impact of pointing error. More specifically, we derive exact closed-form expressions for the outage probability, the average bit error rate, and the average spectral efficiency while adopting an adaptive modulation. Some selected results show that TMOS increases the average spectral efficiency while maintaining a minimum average bit error rate requirement.

© 2017 Optical Society of America

Imperfect-Quantized-Feedback-Based Beamforming for an FSO MISO System Over Gamma–Gamma Fading With Pointing Errors

Ankit Garg, Manav R. Bhatnagar, Olivier Berder, and Baptiste Vrigneau
J. Opt. Commun. Netw. 9(11) 1005-1018 (2017)

Performance of an Amplify-and-Forward Dual-Hop Asymmetric RF–FSO Communication System

Sanya Anees and Manav R. Bhatnagar
J. Opt. Commun. Netw. 7(2) 124-135 (2015)

BER Performance of an Optically Pre-amplified FSO System Under Turbulence and Pointing Errors With ASE Noise

Prakriti Saxena, Aashish Mathur, and Manav R. Bhatnagar
J. Opt. Commun. Netw. 9(6) 498-510 (2017)

M-ary phase-shift keying-based single-input-multiple-output free space optical communication system with pointing errors over a gamma–gamma fading channel

Suman Malik and Prasant Kumar Sahu
Appl. Opt. 59(1) 59-67 (2020)

Two-Way Multiuser Mixed RF/FSO Relaying: Performance Analysis and Power Allocation

Yasser F. Al-Eryani, Anas M. Salhab, Salam A. Zummo, and Mohamed-Slim Alouini
J. Opt. Commun. Netw. 10(4) 396-408 (2018)