The MonA and PotLab instruments represent the upper and lower limits of a range of rugged colorimeters designed for use in developing countries based on the concept of using a light emitting diode (LED) as an alternative to the tungsten lamp and filter of the conventional colorimeter. The green LED with a maximum emission around 565 nm and a band-width of 30 nm was chosen because it is the only...

Historically, mm-wave (mmW) communications have been used for point-to-point (P-P) terrestrial and satellite links, and more recently for indoor short-distance communications. New network architectures consisting of interwoven networks will be needed to meet the requirements of 5G, particularly an ever increasing demand for high data rates. It is believed that mmW communications will contribute...

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This short paper presents an overview of the potential of RF Waveform Measurement and Engineering to support the developments of transistors, circuits and systems that rely on strong non-linear affects. To date these concepts have mainly been focused towards aiding the development of RF Power Amplifiers (RFPAs). This is because the performance of RFPAs both exploits (efficiency) and is limited ...

This paper presents a short range wireless network platform based on Bluetooth technology and on a Round Robin scheduling algotithm. The main goal is to provide an application independent platform in order to support a distributed data acquisition and control system used to control a model of a greenhouse. This platform enables the advantages of wireless communications while assuring low weight...

Wireless communication revolution has made fundamental changes to the communications society and human life. Faster, cheaper, and more power-efficient alternatives are rapidly evolving for wide area, indoor and short-range wireless communications. In addition to ultra-high bit rates, ubiquitous coverage via heterogeneous access, low cost, and machine-to-machine and sensor networks, the Wireless...

The Comments and Addenda section is for short communications which are not of such urgency as to justify publication in Physical Review Letters and are not appropriate for regular Articles. It includes only the following types of communications: (I) comments on papers previously published in The Physical Review or Physical Review Letters; (2) addenda to papers previously puMished in The Physica...

This chapter of the report focuses on coding, modulation, and multiple-access techniques for wireless communications. To put the discussion in perspective, a short background on the development of wireless communication systems, focusing mainly on cellular systems is provided. The following sections discuss coding and modulation and various modulation techniques; present a comparative analysis ...

Ultra wideband (UWB) communications is one of the most promising recent developments in wireless world for high-speed applications as shown in figure 1. In addition, the use of millimeter-waves has allowed in recent years the development of wireless communications: unlicensed short-range (57 – 64 GHz), outdoor semi-unlicensed point to point links (71 76 GHz, 81 86 GHz, and 92 95 GHz), automotiv...

The stage is being set for a communications revolution . . . there can come into homes and business places audio, video and [other] transmissions that will provide newspapers, mail service, banking and shopping facilities, data from libraries, . . . school curricula and other forms of information too numerous to specify. In short, every home and office will contain a communications center of a ...