In this article, we investigate a secure uplink multiple-input multiple-output communication system, in which the multiple users transmit information to a legitimate access point (AP) when a passive ...

Space-time block codes versus space-time trellis codes Abstract: Two outstanding examples of transmit diversity schemes for the multiple-antenna flat-fading channel are space-time block coding (STBC) ...

Aerospace startup Muon Space has booked $146 million in total Series B funding, allowing the satellite constellation manufacturer to ramp up production at a new 130,000-square-foot complex in San ...

The UK has launched a £75.6 million bid to build a spaceship to clear space debris, including satellites. Officials say the major new procurement process will tackle the growing threat of defunct ...

Forget rockets, space shuttles, and UFOs because, with Fly to Space codes, you can reach outer space on foot and put astronauts to shame!

(The Center Square) – The U.S. Air Force and Space Force have met their annual recruitment goal three months early, as of June 30. For years, nearly all U.S. military branches struggled to meet ...

An agency’s service to the country goes far beyond space exploration.

Two-time reigning women's shot put world champion Chase Jackson unleashed a world-best effort for the year with a distance of 20.95 meters to win the Iron Wood Classic on Saturday.Jackson is a ...

The "just right" shade that feels fresh and elegant for 2025.

The Best Illusion of the Year contest offers researchers, and participants, an opportunity to explore the gaps and limits of human perception.

After nearly 20 years of operations, NASA's Mars Reconnaissance Orbiter (MRO) is on a roll, performing a new maneuver to squeeze even more science out of the busy spacecraft as it circles the Red ...