The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provides geolocation and time information to a GPS receiver anywhere on …
Read More »The “nervous system” of the military, the collection of subsystems used to maximize situational awareness, is referred to as C4ISR—command, control, communications, computers, intelligence, surveillance, and reconnaissance. The primary objective of a C4ISR system is to present the overall scenario and picture of the area of interest (such as a …
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Due to the growing, insatiable thirst for information, both commercial and defense communications are driving towards increasingly higher data rates and wider bandwidths of operation. This in turn is driving systems toward higher operating frequencies, which more easily supports larger channel bandwidths. For example, today’s cellular networks (i.e., cellular networks …
Read More »Electromagnetic energy, produced by the vibration of charged particles, travels in the form of waves through the atmosphere and the vacuum of space. These waves have different wavelengths (the distance from wave crest to wave crest) and frequencies, These two are inversely related to each other, the shorter the wavelength, …
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The explosive growth of optical communication technology in the past decades has revolutionized the telecom industry and created a global communication infrastructure with optical networks. Optical communication links and networks are essential for the Internet backbone as well as for interconnects used in data centres and high-performance computing systems. The increasing …
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A spatial light modulator (SLM) is a special device that can manipulate light by modulating the amplitude, phase or polarization of the light waves in the two dimensions of space and time. This means that light is manipulated in order to obtain a desired output, and SLM is commonly used …
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Researchers are exploring the possibilities of combining the operations of distributed mobile systems with coherence at the radio frequency (RF) level, called coherent RF arrays, and the microwave and millimeter-wave technologies necessary to get there. The term “distributed” makes explicit that either the transmission or the reception function is divided …
Read More »Photonics is the science of controlling the flow of light. The characteristics of the waves of light or individual photons that make up light can be used to explore the universe, cure diseases, and even solve crimes. It is a branch of optics that deals with the generation, transmission, modulation, …
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Power electronics is the branch of electrical engineering that deals with the processing of high voltages and currents to deliver power that supports a variety of needs. From household electronics to equipment in space applications, these areas all need stable and reliable electric power with the desired specifications. Power supply in one …
Read More »There were 79 zettabytes of data generated worldwide in 2021. By 2025, more than 150 zettabytes of big data will need analysis. Dramatic increases in data storage capacities are urgently needed as they are being outpaced by exponential growth in data generation, driven by use of the internet, social media, …
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