Search results
Results from the WOW.Com Content Network
Controlled reception pattern antennas (CRPA) are active antennas that are designed to resist radio jamming and spoofing. They are used in navigation applications to resist GPS spoofing attacks. [ 1 ] [ 2 ]
A large variety of techniques and devices are used to provide indoor positioning ranging from reconfigured devices already deployed such as smartphones, WiFi and Bluetooth antennas, digital cameras, and clocks; to purpose built installations with relays and beacons strategically placed throughout a defined space. Lights, radio waves, magnetic ...
The position/object/item packets contain the latitude and longitude, and a symbol to be displayed on the map, and have many optional fields for altitude, course, speed, radiated power, antenna height above average terrain, antenna gain, and voice operating frequency. Positions of fixed stations are configured in the APRS software.
GPS antenna size limits tracker size, often smaller than a half-dollar (diameter 30.61 mm). In 2020 tracking is a $2 billion business plus military-in the gulf war 10% or more targets used trackers. Virtually every cellphone tracks its movements. Tracks can be map displayed in real time, using GPS tracking software and devices with GPS ...
It is a term for the antenna on GPS navigation devices, which receives GPS signals from GPS satellites. The early antennas were round, and thus had the appearance of a hockey puck. The GPS puck is commonly used in the boating electronic industry. The reason the boating industry uses the GPS puck is because they give a true signal of direction ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
A diagram contrasting a single antenna configuration with DAS A typical DAS node for the Videotron 3G network in Montreal, Quebec DAS deployed by Transit Wireless in New York City Subway to provide WiFi, cellular voice and data coverage. The RF node with three antennas was at the platform and another antenna near the stairs on the far side.
A GPS receiver processes the GPS signals received on its antenna to determine position, velocity and/or timing. The signal at antenna is amplified, down converted to baseband or intermediate frequency, filtered (to remove frequencies outside the intended frequency range for the digital signal that would alias into it) and digitalized; these ...