Abstract

We propose to use 1-bit feedforward information at the free-space optical (FSO) receiver to improve its error performance. We concentrate upon $M$-ary pulse amplitude modulation (PAM) signaling and design an error-optimal PAM constellation for providing efficient 1-bit feedforward information to the receiver. A maximum likelihood detector is derived, and the symbol error rate of the considered FSO system is analytically obtained in closed form by using a union-bound approach. It is shown by using the analysis and simulation that 1-bit feedforward can significantly improve the performance of PAM in FSO systems.

© 2021 Optical Society of America

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)

Assessment of the FSO communication system using adaptive and MIMO MPPM with pointing errors and an atmospheric turbulence channel

Suman Malik and Prasant Kumar Sahu
Appl. Opt. 60(6) 1719-1728 (2021)

Performance study of a serial relay CC-OGSM-SD free space optical system based on an M distribution model

Yi Wang, Wenqi Du, and Rui Zhou
Appl. Opt. 60(25) 7696-7705 (2021)

Performance Evaluation of Space Shift Keying in Free-Space Optical Communication

Anshul Jaiswal, Manav R. Bhatnagar, and Virander Kumar Jain
J. Opt. Commun. Netw. 9(2) 149-160 (2017)

Design and experimental demonstration of 8-QAM coherent free-space optical communication using amplitude compensation and phase recovery

Lin Li, Tianwen Geng, Zhiyong Wu, Shijie Gao, and Xueliang Li
Appl. Opt. 60(18) 5345-5353 (2021)