The GIOVE-A satellite is in good health and started transmitting the first Galileo signals from medium Earth orbit on 12 January. GIOVE-A was placed in orbit (altitude 23,260 km) by a Soyuz-Fregat ...

Optical signal transmission can be significantly improved by limiting the wavelength of transmitted signals. Fiber Bragg grating (FBG) is a technique widely used in optical communication, sensing, and ...

The positioning, navigation, and timing (PNT) information is fundamental to modern information systems. Over the years, people have invented many navigation systems to get PNT information, whereas ...

CIA Director John Ratcliffe said the Signal chat texts published by The Atlantic Wednesday revealing the so-called "attack plans" targeting Yemen’s Houthi rebels prove he "did not transmit classified ...

The Adaptive Joint Command, Control, Communications, Computers, Intelligence, Surveillance and Reconnaissance Node (AJCN) is a multimission radio frequency system that would provide seamless ...

A Small-Satellite-Mounted 256-Element Ka-Band CMOS Phased-Array Transmitter Achieving 63.8dBm EIRP Under 26.6W Power Consumption Using Single/Dual Circular Polarization Active Coupler, 2023 IEEE ...

Scientists have managed for the first time to create a unidirectional device that significantly increases the quality of a special class of transmitted signals in optical communications: optical ...

The distress signal CQD originated from the signal CQ, expressing "seeking you," or "all stations." The signal CQ was commonly used among wireless operators -- and land-based telegraphers before them ...

Researchers at MIT Lincoln Laboratory have developed a first-of-its-kind hydrophone built around a simple, commercially available microphone. The device, leveraging a common microfabrication process ...

Clock generation and distribution is a significant challenge in the design of large and complex digital systems., Ordinarily, clock generation and distribution can be well controlled in small systems ...