The U.S. Department of Transportation announced a multibillion-dollar plan to overhaul the air traffic control system following ... and improve flight safety. Delta CEO Ed Bastian said the upgrade ...

The modulated beat frequency signal can be demodulated by a frequency-modulation demodulator. It is demonstrated that the vibration from 60 Hz to 20 KHz can be measured successfully. The sensor has ...

We found a kind of twice modulation ... modulation/demodulation scheme without increasing the light-emitting diode intensity. Subsequently, we developed a cost-saving hardware sensor which can meet ...

This paper conducts a research on modulation characteristics of blue light-emitting diodes (LEDs) used in a visible-light communication (VLC) system. Through analysis of the modulation characteristics ...

Institute of Systems Engineering, Macau University of Science and Technology, Macao 200240, P. R. China ...