Daily Archives: October 20, 2010

Spread-spectrum and ultra-wideband (UWB) technology arose during the Second World War. Actress Hedy Kiesler Markey (better known by her screen name, Hedy Lamarr) and George Antheil invented a frequency-hopping secret communication system. [1] The  Figure below shows their frequency hopping transmitter. A record tape encodes a unique coding pattern to […]

RTLS: The First Ultrawideband Wireless System