I’ll be presenting a paper, “On the Origins of RF-Based Location,” at the 2011 IEEE Radio and Wireless Symposium this morning at 8:00 in room Cira A. The paper collects together the pre-WWII material I’ve blogged about under the History of RF-Based Location category here at ÆtherCzar. This paper will provide […]

IEEE RWS 2011: “On the Origins of RF-Based Location”

Time for more wireless updates: Here’s a great article about the British precursor to LORAN: “GEE.” GEE was one of the first implementations of the “Time-Difference-of-Arrival (TDOA)” concept used in some modern RTLS implementations. A simple explanation of Ekahau RTLS: “The Perfect Pairing of RF and IR.” Whatever happened to […]

An RTLS, RFID, and Wireless Update

Alfred L. Loomis invented the Long-Range Navigation or "LORAN" system in 1942. Source: U.S. Patent 2,884,628.
The Second World War spurred further innovation in RF-based navigation. The first wide-scale deployment of an RF-based location system was the Long Range Navigation or “LORAN.” LORAN was an evolution from a shorter range British system called “GEE.” Like GEE, LORAN employed synchronized impulse signal transmissions from paired transmit towers. […]

RTLS: The Invention of the Long Range Navigation (LORAN) System