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Space and Missile Systems Center

Overview The Space and Missile Systems Center (SMC) is a unit of the United States Space Force (USSF). Its purpose is…

Trellis Coded Modulation (TCM)

Overview Trellis Coded Modulation (TCM) is the combination of convolutional (or trellis) coding and modulation into one step. A 1/2 convulation…

Iridium

Iridium is a LEO satellite constellation which provides high-quality voice and data connections across the entire planet. The constellation was originally…

Signal-to-Noise Ratio (SNR)

Overview Signal-to-Noise Ratio (SNR) is a measure used to directly compare the strength of a signal relative to background noise. [1]…

Quadrature Amplitude Modulation (QAM)

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

Space Data Highway

The Space Data Highway (SDH) is a service operated by Airbus that uses the European Data Relay System (EDRS) to provide…

ARTES

The European Space Agency’s Advanced Research in Telecommunication Systems (ESA’s ARTES) is a program focused on developing products and services for…

U.S. Spaceforce

The United States Space Force (USSF), formerly the Air Force Space Command (AFSC), is the branch of the United States military…

ScyLight

ScyLight is a program run by the European Space Agency (ESA) with the purpose to address innovative optical communications technologies for…

Coherent Orthogonal Optical Frequency Division Multiplexing (CO-OFDM)

Coherent Orthogonal Optical Frequency Division Multiplexing (CO-OFDM) a type of WDM technology that uses the mathematical principle of orthogonality to send…

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