In this paper, we analyze various energy efficient routing protocols to improve the lifetime of wireless sensor networks. WSNs are composed of a large number of sensor nodes which have limited energy. Energy conservation is a very critical issue to design energy efficient routing techniques in wireless sensor networks. The paper reviews the traditional energy […]
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An improved cluster head selection approach for energy efficiency in wireless sensor networks: A review
The impedance of an antenna changes heavily with changing EM environments, while RF power amplifiers (PAs) are optimized for driving a well-defined load impedance. As a solution, switchable matching networks are used in automatic antenna tuners to match the antenna impedance to (about) the desired PA load impedance. This paper presents a theoretical treaty of […]
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Experimental Control and Design of Low-Frequency Bias Networks for Dynamically Biased Amplifiers
To reach the video bandwidth requirements on the supply paths, power amplifiers with dynamic bias schemes are constrained to reduce the values of the low-frequency (LF) decoupling capacitors on their bias lines. This can entail a decrease of the LF stability margins, among other negative effects. In this work, a methodology is proposed to experimentally […]
Read moreThe automatic recognition of sound events by computers is an important aspect of emerging applications such as automated surveillance, machine hearing and auditory scene understanding. Recent advances in machine learning, as well as in computational models of the human auditory system, have contributed to advances in this increasingly popular research field. Robust sound event classification, […]
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