optical wireless communications
Novel Techniques of Single-CarrierFrequency-Domain Equalization for Optical Wireless Communications
... In this paper, we present three new modulation techniques for diffuse optical wireless communications with IM/DD. The first applies asymmetrically clipped optical (ACO) principles to SCFDE ...
13
Genetic algorithm optimisation methods applied to the indoor optical wireless communications channel
... Over the preceding chapters it has been shown that the application of genetic algorithms to a few of the problems of indoor optical wireless communications may prove to be one of a possible number of ...
229
Underwater optical wireless communications : depth dependent variations in attenuation
... There is a growing interest in the use of optical wireless communications for underwater applica- tions such as ocean monitoring and defense. Recent research has shown this technology to be capable ...
8
Optical wireless communications utilizing a dicode PPM PIN BJT receiver
... in optical wireless communications has been widely studied [1–9] due to its high sensitivity, which is ideal for portable devices, along with its immunity to near-DC noise from fluores- cent ...to ...
5
Asymptotic analysis of V BLAST MIMO for coherent optical wireless communications in Gamma Gamma turbulence
... Turbulent optical channel pdfs come in challenging forms resulting in significant difficulties in designing systems that transmit a higher symbol rate than one symbol per transmission in such ...
15
Design considerations of conventional angle diversity receivers for indoor optical wireless communications
... The propagation characteristics of an indoor infrared channel are fully described by the channel’ s impulse re- sponse, which depends on multiple factors such as the room geometry, the reflection pattern of surfaces, the ...
15
Hybrid pulse interval modulation code division multiple access for optical wireless communications
... Consequently, robust spread spectrum modulation techniques are required, which result in low data rates. As an example, the IEEE 802.11-1997 standard for WLANs physical (PHY) layer specifies that either the ...
215
Impact of receiver field of view on underwater optical wireless communications
... The main optical properties that affect the attenuation of light in water are absorption and scattering. The former occurs when a photon loses energy as a result of the interaction between photons and other ...
5
Optical property variability in the underwater optical wireless channel
... underwater optical wireless communications. The number of optical communication- based models is further restricted if taking into consideration only LOS and direct links, as opposed to ...
215
Differential Amplitude Pulse Position Modulation for Indoor Wireless Optical Communications
... access wireless local area networks from portable personal computers and mobile devices has grown ...indoor optical wireless communications has received wide interest [1, ...of optical ...
9
Wireless Communications: An Area of Opportunity for Ireland
... and hosting activities, exploiting current activities in middleware to create a European hub for the emerging mobile application hosting industry. Hosting mobile applications is set to become a key constitutive element ...
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Submodularity and Its Applications in Wireless Communications
... In any adaptive modulation method for NC-TWRC, the decisions of both sched- ulers are made in phase I, the MAC phase. By considering the SNRs of user-to- user channels, the transmission error rate in the system is ...
182
Differential Evolution in Wireless Communications: A Review
... in wireless multimedia sensor networks [166] and hence solving the targets coverage problem [167-168] and nudge redundant active nodes into sleep mode [169] or reduction of number of individual nodes which ...
24
Abstract Wireless communications using microwaves are
... In the present work a simple laboratory arrangement was implemented that permitted systematic performance measurements of available access point equipments (RBT-4102 from Enterasys Networks) in IEEE 802.11a, b, g ...
5
6.0 Ghz Antenna For Wireless Communications
... IX TABLE OF CONTENT CHAPTER CONTENT PAGE PROJECT TITLE 1 2 REPORT STATUS ii DECLARATION iii APPROVAL iv DEDICATION v ACKNOWLEDGEMENT vi ABSTRACT vii ABSTRAK viii TABLE OF CONTENT ix LIST[r] ...
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Performance analysis for cooperative wireless communications
... of wireless communication systems is al- ways influenced by path loss, interference from other users, fading in wireless channels, ...for wireless communications was proposed in ...
255
A Hybrid of Optical and Wireless Communications System
... This paper presents the analysis and the realization of a hybrid 60 GHz wireless communications system. As the 50 GHz radio link operates only in a single-room configuration, an additional Radio over Fibre ...
7
Timing synchronization for cooperative wireless communications
... Cooperative Communications: Performance Analysis with Power Constraints in Presence of Timing Error”, in Proceedings of International Workshop on Cognitive Radio and Cooperative Strategies for Power Saving ...
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Energy efficient and secure wireless communications for wireless sensor networks
... From Figure 3.6, we can conclude that as the number of nodes increase, both the average transmission cost of AODV-EHA and DEHAR decrease gradually, and AODV- EHA overcomes DEHAR in any case in terms of energy saving. By ...
130
Wireless communications in the new millennium and third generation wireless networks
... FDD GEA GGSN GMM/SM GSEVI GSM GSN Frequency Division Duplex GPRS Encryption Algorithm Gateway GPRS Support Node GPRS Mobility Management and Session Management GSM Service Identity Modul[r] ...
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