Abstract: To address the problem of high complexity of channel estimation for orthogonal time frequency space (OTFS) systems, we propose a low complexity channel estimation method leveraging the ...

Nancy Shute talks about life’s complexities, from its evolution on Earth as a single cell to complex human behavior.

Addis Ababa, December 11, 2025 (ENA)—Ethiopia is committed to advancing a peaceful and cooperative continental space development, Space Science and Geospatial Institute Deputy Director-General ...

Astronauts Tom Stafford (left) and Wally Schirra (right) demonstrating with two model space crafts during an interview in the 1960s Donald Uhrbrock / Getty Images On December 15, 1965, NASA’s mission ...

Clocks on Mars tick faster by about 477 microseconds each Earth day, a new study suggests. This difference is significantly more than that for our moon, posing potential challenges for future crewed ...

Abstract: Application of ridge detection algorithms to various transforms and problems in time-frequency (TF) analysis has become increasingly widespread with notable application in the instantaneous ...

Weather permitting, SpaceX Falcon 9 may be visible in the sky beyond Cape Canaveral, Florida, after liftoff. Early morning and nighttime launches can offer unique photo opportunities as the rocket ...

A butterfly net, tweezers and a drawstring bag brimming with small plastic vials: it is an unusual toolkit for a photographer, but not for Michael Benson. Over six years, he gathered specimens for his ...