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Device-to-device communication in 5G cellular networks: challenges, solutions, and future directions
(IEEE, 2014-05)
In a conventional cellular system, devices are not allowed to directly communicate with each other in the licensed cellular bandwidth and all communications take place through the base stations. In this article, we envision ...
Survey on free space optical communication: a communication theory perspective
(IEEE, 2014)
Optical wireless communication (OWC) refers to transmission in unguided propagation media through the use of optical carriers, i.e., visible, infrared (IR), and ultraviolet (UV) bands. In this survey, we focus on outdoor ...
Outage analysis of hybrid FSO/RF systems based on finite-state Markov Chain modeling
(IEEE, 2014)
In this paper, we analyze the outage probability of a hybrid free-space optical/radio-frequency (FSO/RF) communication system with soft-switching. In soft-switching approach, either one of the links or both links can be ...
Relay-assisted OFDM transmission for indoor visible light communication
(IEEE, 2014)
In this study, we investigate a relay-assisted visible light communication (VEC) system where an intermediate light source cooperates with the main light source. Specifically, we consider two light sources in an office ...
Optical wireless communications – an emerging technology
(IEEE, 2014)
Optical wireless communication (OWC) enables wireless connectivity using infrared, visible or ultraviolet bands. With its powerful features such as high bandwidth, low cost and operation in an unregulated spectrum, OWC can ...
Cognitive cooperative MAC with one primary and two secondary users: Achievable rates and optimal power control
(IEEE, 2014-11)
We consider a three-user fading cognitive cooperative multiple access channel (MAC) with one primary and two secondary transmitters. We propose two encoding/decoding strategies with varying levels of cooperation, based on ...
Stochastic resonance in graphene bilayer optical nanoreceivers
(IEEE, 2014-11)
Graphene, a 2-D sheet of carbon atoms, is believed to have diverse application areas ranging from medicine to communications. A novel application is using graphene as a photodetector in optical communications due to its ...
Optimal choice of transmission parameters for LDPC-coded CPM
(IEEE, 2014)
Continuous phase modulation (CPM) has attractive features such as spectral efficiency and constant envelope making it attractive for tactical waveforms. Serial concatenation of CPM with Low Density Parity Check Codes (LDPCs) ...
An adaptive modulation scheme for coded free-space optical systems
(IEEE, 2014)
For very slowly-varying fading channels as in the case of atmospheric turbulence-induced fading, it is possible to reliably estimate the channel state information and send it back to the transmitter. The transmitter can ...
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