Capacity of optical wireless communication channels

2020 ◽  
Vol 378 (2169) ◽  
pp. 20190184 ◽  
Author(s):  
A. Chaaban ◽  
S. Hranilovic
Keyword(s):  
Wireless Communication ◽  
Direct Detection ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Theme Issue ◽  
Optical Wireless Communications ◽  
Physical Constraints ◽  
Mode Of Operation ◽  
Capacity Bounds ◽  
Safety Considerations

Optical wireless communications are realized by modulating the intensity of a light source and detecting intensity fluctuations at the receiver. This mode of operation, known as intensity modulation and direct detection (IM/DD), is simple to implement in practice. However, computing the channel capacity of the underlying channel is not straightforward because of the amplitude constraints that arise due to IM/DD operation. In particular, the transmit signal must be non-negative, while the peak and average amplitudes are constrained due to practical and safety considerations. Though a closed form for the capacity of IM/DD channels is not known, much work has been done to find capacity bounds and asymptotic capacity expressions. In this paper, a description of the IM/DD channel and its physical constraints is presented, followed by a review of recent progress pertaining to the capacity of IM/DD channels. Additionally, capacity-achieving distributions are discussed along with simple constructions that approach capacity. This article is part of the theme issue ‘Optical wireless communication’.

scholarly journals Experimental Demonstration of High-Sensitivity Underwater Optical Wireless Communication Based on Photocounting Receiver

Photonics ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 467
Author(s):  
Chao Li ◽  
Zichen Liu ◽  
Daomin Chen ◽  
Xiong Deng ◽  
Fulong Yan ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Direct Detection ◽  
Light Emitting Diode ◽  
Photon Counting ◽  
High Sensitivity ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Receiver Sensitivity ◽  
Data Rates ◽  
Type C

In this paper, we propose a high-sensitivity long-reach underwater optical wireless communication (UOWC) system with an Mbps-scale data rate. Using a commercial blue light-emitting diode (LED) source, a photon counting receiver, and return-to-zero on–off keying modulation, a receiver sensitivity of −70 dBm at 7% FEC limit is successfully achieved for a 5 Mbps intensity modulation direct detection UOWC system over 10 m underwater channel. For 1 Mbps and 2 Mbps data rates, the receiver sensitivity is enhanced to −76 dBm and −74 dBm, respectively. We further investigate the system performance under different water conditions: first type of seawater (c = 0.056 m−1), second type (c = 0.151 m−1), and third type (c = 0.398 m−1). The maximum distance of the 2 Mbps signal can be extended up to 100 m in the first type of seawater.

scholarly journals Optical wireless communication

2020 ◽  
Vol 378 (2169) ◽  
pp. 20200051 ◽  
Author(s):  
Harald Haas ◽  
Jaafar Elmirghani ◽  
Ian White
Keyword(s):  
Wireless Networks ◽  
Wireless Communication ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Special Issue ◽  
Theme Issue ◽  
Significant Interest ◽  
New Ideas ◽  
Comprehensive Reference

Optical wireless communication has attracted significant interest recently in industry and academia. This special issue features a collection of inter-related papers with the intention to cover all necessary multidisciplinary challenges to realize optical wireless networks. We hope that this special issue will serve as a comprehensive reference and that it will be a resource which fosters many more new ideas for this rapidly emerging field. This article is part of the theme issue ‘Optical wireless communication’.

Performance Analysis of QAM with MEMS Based SCIR for Indoor Optical Wireless Communication

2014 ◽  
Vol 592-594 ◽  
pp. 2189-2192 ◽  
Author(s):  
M.P. Prabakaran ◽  
A. Sivasubramanian ◽  
K. Chitra
Keyword(s):  
Wireless Communications ◽  
Wireless Communication ◽  
Additive White Gaussian Noise ◽  
Systematic Evaluation ◽  
Modern World ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Optical Wireless Communications ◽  
Modulation Schemes ◽  
Indoor Optical Wireless Communication

This paper presents the systematic evaluation of performance of indoor optical wireless communication using different modulation schemes and micro electro mechanical systems - single channel imaging receiver (MEMS-SCIR). For the future modern world, indoor optical wireless communications (OWC) play a vital role. The main objective is to compare the performance of various modulation schemes in terms of their bit error probability. On -off keying (OOK) and pulse position modulation (PPM) are widely used in optical wireless communication for its simplicity. Here different digital modulation schemes are approached; bit error rate (BER) is calculated over additive white Gaussian noise channel (AWGN). M-quadrature amplitude modulation (MQAM) gives a better BER performance compared to the M- phase shift keying (MPSK). Thus, MQAM based MEMS-SCIR provides better performance in indoor optical wireless communications.

scholarly journals Underwater Optical Wireless Communications: Overview

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2261 ◽  
Author(s):  
Giuseppe Schirripa Spagnolo ◽  
Lorenzo Cozzella ◽  
Fabio Leccese
Keyword(s):  
Wireless Communications ◽  
Wireless Communication ◽  
Single Photon ◽  
Green Light ◽  
Low Latency ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Optical Wireless Communications ◽  
Data Rates ◽  
Absorption Window

Underwater Optical Wireless Communication (UOWC) is not a new idea, but it has recently attracted renewed interest since seawater presents a reduced absorption window for blue-green light. Due to its higher bandwidth, underwater optical wireless communications can support higher data rates at low latency levels compared to acoustic and RF counterparts. The paper is aimed at those who want to undertake studies on UOWC. It offers an overview on the current technologies and those potentially available soon. Particular attention has been given to offering a recent bibliography, especially on the use of single-photon receivers.

Analysis of Inter-Satellite Optical Wireless Communication System

2017 ◽  
Vol 7 (10) ◽  
pp. 10
Author(s):  
Rajbir Singh
Keyword(s):  
Wireless Communication ◽  
Optical Networks ◽  
Data Transmission ◽  
High Speed ◽  
Open Space ◽  
Communication Link ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
High Speed Data ◽  
Speed Data Transmission

Optical networks are bandwidth efficient networks are used for long haul communication providing seamless data transfer. For high speed data transmission in open space between different satellites, Inter-satellite Optical wireless communication (IsOWC) is widely used .In this paper we have evaluated the performance of IsOWC communication link for high speed data transmission .The performance of the system is evaluated on the basis of qualitative parameters such as Q-factor and BER using optisystem simulator.

Sign in / Sign up

Export Citation Format

Share Document