A survey on higher-order QAM constellations: Technical challenges, recent advances, and future trends

PK Singya, P Shaik, N Kumar, V Bhatia… - IEEE Open Journal of …, 2021 - ieeexplore.ieee.org
Communication system's performance is sensitive to bandwidth, power, cost etc. There have
been various solutions to improve the performance, out of them, one of the fundamental …

Free space optics, channel models and hybrid modulation schemes: A review

S Magidi, A Jabeena - Wireless Personal Communications, 2021 - Springer
Free space optical (FSO) communication system is a wireless communication technology
which possess advantages such as huge license free bandwidth and high data carrying …

Analysis of M-QAM modulated underwater wireless optical communication system for reconfigurable UOWSNs employed in river meets ocean scenario

A Uppalapati, RP Naik… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
In this paper, the bit error rate (BER) performance of underwater wireless optical
communication system employing with M-ary quadrature amplitude modulation is proposed …

Performance of generalized QAM/FSO systems with pointing misalignment and phase error over atmospheric turbulence channels

TV Nguyen, TV Pham, NT Dang, AT Pham - IEEE Access, 2020 - ieeexplore.ieee.org
This article investigates the performance of free-space optical (FSO) systems using sub-
carrier quadrature amplitude modulation (SC-QAM) signaling for broadband terrestrial …

All-optical relaying FSO systems using EDFA combined with optical hard-limiter over atmospheric turbulence channels

PV Trinh, NT Dang, AT Pham - Journal of Lightwave …, 2015 - ieeexplore.ieee.org
In this paper, a novel relaying technique is proposed to improve the bit-error rate (BER)
performance and distance coverage of high-speed all-optical free-space optical (FSO) …

Average BER performance of rectangular QAM-UWOC over strong oceanic turbulence channels with pointing error

Y Fu, Q Duan, C Huang, Y Du, L Zhou - Optics Communications, 2020 - Elsevier
We theoretically analyze the average bit error rate (ABER) performance of underwater
wireless optical communication (UWOC) systems using rectangular quadrature-amplitude …

Turbulence-resilient pilot-assisted self-coherent free-space optical communications using a photodetector array for bandwidth enhancement

H Song, R Zhang, H Zhou, X Su, K Zou, Y Duan… - Optics Letters, 2022 - opg.optica.org
We experimentally demonstrate a 4-Gbit/s 16-QAM pilot-assisted, self-coherent, and
turbulence-resilient free-space optical link using a photodetector (PD) array. The turbulence …

Performance Enhancement of FSO communication system Under Rainy Weather Environment using a novel encryption technique

SA Abd El-Mottaleb, AG Mohamed, HY Ahmed… - IEEE …, 2024 - ieeexplore.ieee.org
Free Space Optics (FSO) has emerged as a viable solution to meet the growing demand for
high bandwidth, secure data transmission, and high speed. However, the FSO system is …

SMF/FSO integrated dual-rate reliable and energy efficient WDM optical access network for smart and urban communities

AK Garg, SK Metya, G Singh, V Janyani, MH Aly… - Optical and Quantum …, 2021 - Springer
To handle the massive high-speed internet traffic, free space optics (FSO) or single-mode
fiber (SMF) based fiber optic communication is being used everywhere across the world …

Power adaptation based on truncated channel inversion for hybrid FSO/RF transmission with adaptive combining

T Rakia, HC Yang, F Gebali… - IEEE Photonics …, 2015 - ieeexplore.ieee.org
Hybrid free-space optical (FSO)/radio-frequency (RF) systems have emerged as a promising
solution for high-data-rate wireless communications. In this paper, we consider power …