Cognitive radio networks (CRNs) represent an innovative paradigm in wireless communications that optimises the usage of the limited radio frequency spectrum. By enabling unlicensed secondary users to ...

Visible light is just one part of the electromagnetic spectrum that astronomers use to study the Universe. The James Webb Space Telescope was built to see infrared light, other space telescopes ...

One of the huge drawbacks of modern technology is that it fills the air around us with radio signals. From your kitchen radio to your LTE-enabled smartphone, all of these devices use radio waves to ...

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Harvard researchers built a racetrack-shaped quantum cascade laser that makes bright, stable, mid-infrared frequency combs on ...

Active remote sensing is the principal tool used to study and to predict short- and long-term changes in the environment of Earth - the atmosphere, the oceans and the land surfaces - as well as the ...

Active sensing encompasses the use of a transmitter and at least one receiver to measure (sense) the transmission or scattering properties of a medium at radio frequencies. In transmission ...

The purpose of the project is to analyze and monitor the radio signal spectrum wherein its FFT is calculated which is displayed in a graphical LCD. The method of analyzing the spectrum of an input ...

This spring, the University of Notre Dame welcomes the development of a critical strategy at the national level. It’s about the radio frequency spectrum, the natural resource used by all sorts of high ...

Agreement has been reached at the World Radiocommunication Conference in Geneva on the allocation of radiofrequency spectrum for global flight tracking in civil aviation. The frequency band ...