Overview At the University of Central Florida (UCF), Pooya Nabavi and Murat Yuksei have designed and prototyped a wide field-of-view (FOV) optical receiver to enable visual light communication (VLC) ...

Overview Quadrature Amplitude Modulation (QAM) is the combination and modulation of two signals which have a 90º phase shift from one another. It is the 90º phase shift which causes the two signals t ...

Overview Signal-to-Noise Ratio (SNR) is a measure used to directly compare the strength of a signal relative to background noise. SNR is often expressed in decibles using the equation where represents ...

Overview Trellis Coded Modulation (TCM) is the combination of convolutional (or trellis) coding and modulation into one step.  A 1/2 convulation code takes one bit and codes it into two bits. ...

Overview A Satellite-to-Ground Link (SGL) describes the communication between a satellite and a ground station. If the ground station is transmitting the signal up to a satellite it is an uplink ...

Overview Geostationary orbit, also known as geosynchronous equitorial orbit (GEO), is the region of space surrounding earth above 35,786 km. Satellites in this region positioned along the equator will ...

Overview Low Earth Orbit (LEO) is the region of space surrounding Earth at distance less than 2,000 km, typically between 400 to 900 km. Most satellites orbiting the Earth lie in this region. Due to ...

Overview Telstar is a series of satellites that helped launch a new age in electronic communications. The first in the line of satellites, Telstar 1, was launched on July 10, 1962 from Cape Canaveral, ...

Overview Medium Earth Orbit (MEO) is the region of space surrounding earth that lies in between low Earth orbit (LEO) and geostationary orbit (GEO). This is the region between 2,000 and 35,786 km ...

Overview NASA has been collecting capability statements from any small businesses which can develop mission-ready optical communication technologies at a NASA Technical Readiness Level (TRL)-5 and ...