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Anywhere a primary electrical source is not available, batteries seem to be the only way to allow the use of stand-alone electrical facilities. Unfortunately, there are some issues related to the use of batteries such as the necessity of regularly checking their charge status and, eventually, proceeding to their replacement, as well as of caring for their treatment as special waste at the end of their...
Wireless sensor networks are today more and more widespread. Along with the installation of more and more networks, a number of new standard documents has also been produced to update the regulation concerning data communication between sensors and data collectors. Differently, less attention has been paid to the different modes of powering the local sensors. At present, the energy required for local...
Contactless induction mechanisms represent a valuable solution to recharge battery-powered vehicles when plugging to the mains reveals troublesome or impossible. A relevant example is that of unmanned aerial vehicles (UAV) employed in hostile environments for persistent surveillance and perils reconnaissance. To complete long duration missions, these vehicles have to land on mobile platforms several...
The main issues concerning the development of induction and wireless power transmission technologies aimed at supplying and/or controlling remote electrical equipment are discussed. The attention is mainly paid to critical logistic scenarios and measurement applications. Typical critical logistic scenarios consist in situations in which battery-less instrumentation needs to operate in wastelands or...
When a pulse train stimulus is applied to a waveguide or transmission line terminated on an unmatched load, interesting information can be achieved through the analysis of the spectrum of the wave standing along the line. This wave includes both the applied pulse train and the contribution due to the load that reflects part of the incident energy. It can be shown that the profile of the comb-line...
This paper focuses on a newly developed transparent nADPCMBJ⊥MLT speech coding algorithm. Our coder first decomposes the narrowband speech signal in subbands, a non linear ADPCM scheme is then performed in each subband. The signal subband decomposition is piloted by the equivalent Modulated Lapped Transform (MLT) filter bank. The novelty of this algorithm is the non linear approach, based on neural...
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