A Software-Defined Multi-Element VLC Architecture

Abstract

In the modern era of radio frequency (RF) spectrum crunch, visible light communication (VLC) is a recent and promising alternative technology that operates at the visible light spectrum. Thanks to its unlicensed and large bandwidth, VLC can deliver high throughput, better energy efficiency, and low cost data communications. In this article, a hybrid RF/VLC architecture is considered that can simultaneously provide lighting and communication coverage across a room. Considered architecture involves a novel multi-element hemispherical bulb design, which can transmit multiple data streams over light emitting diode (LED) modules. Simulations considering various VLC transmitter configurations and topologies show that good link quality and high spatial reuse can be maintained in typical indoor communication scenarios.Index Terms-Free space optics (FSO), light emitting diode (LED), visible light communication (VLC).

Exploring cooperative NOMA assisted hybrid visible light and radio frequency for enhanced vehicular message dissemination at road intersections

“…VLC is attractive because of its advantageous features such as large unlicensed bandwidth and high throughput with negligible interference from nearby users [23]- [25]. V-VLC is an outdoor application of VLC that complements the V-RF by employing the headlights and taillights of vehicles for communicating data between them [26].…”

Impact of Random Receiver Orientation on Visible Light Communications Channel

“…We observe that the first term involving the function θ (·) is zero over the interval 0 ≤ x < cos 2 (Θ) by the definition in (12), and the cdf in (14) becomes equal to 1 − F θ (Θ) over this interval. The cdf is 0 for x < 0, which means the function in (14) is discontinuous at x = 0. With this observation, we can give the corresponding pdf as follows…”

“…In practice, however, the field-of-view (FOV) of VLC receiver is usually limited, which in turn appears as a barrier in providing seamless network connectivity. The hybrid RF/VLC networks [10]- [14] and relay-assisted cooperative VLC systems [15]- [17] are two main research directions to circumvent FOV constraints and extend the network coverage as desired. Furthermore, as the density and mobility of VLC receivers increase along This work is supported in part by NSF CNS awards 1422354 and 1422062.…”