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Digital antenna array (receiver segment) Digital antenna array (transmitter part) Digital antenna array (DAA) is a smart antenna with multi channels digital beamforming, usually by using fast Fourier transform (FFT). The development and practical realization of digital antenna arrays theory started in 1962 under the guidance of Vladimir Varyukhin .
Smart antennas (also known as adaptive array antennas, digital antenna arrays, multiple antennas and, recently, MIMO) are antenna arrays with smart signal processing algorithms used to identify spatial signal signatures such as the direction of arrival (DOA) of the signal, and use them to calculate beamforming vectors which are used to track and locate the antenna beam on the mobile/target.
The omnidirectional drive consists of three Mecanum wheels, all of which are individually controllable.These wheels are arranged at angles of 120°. Robotino has a bumper sensor around its circumference, infrared distance sensors, a color camera with VGA resolution, optical wheel encoders, power measurement for the entire system and the various motors, as well as a battery voltage monitor.
Festo is known for making moving robots that move like animals, such as the seagull-like SmartBird, jellyfish, butterflies and the BionicKangaroo. [2] In 2018 they also added a flying fox and a rolling spider to the list. [3] Festo calls their Bionic Flying Fox an “ultra-lightweight flying object with intelligent kinematics.” [citation needed]
A secondary antenna has a greater beam width than the primary antenna and receives the same tracking signal from the satellite. The primary antenna is tracked according to a predetermined search pattern which causes a variation in the signal amplitude depending upon the relative location of the satellite and the antenna position.
While an airborne system can eavesdrop on a mobile user anywhere in a cellular network, it will receive all mobile stations reusing the same user and control frequencies at roughly the same power level. Adaptive antenna beamforming and interference cancellation techniques are used to focus on the target user. [37] AST was acquired by Raytheon ...
The Antenna Interface Standards Group (commonly referred to as AISG) is a non-profit international consortium formed by collaboration between communication infrastructure manufacturers and network operators with the purpose of maintaining and developing a standard for digital remote control and monitoring of antenna line devices in the wireless industry. [1]
A beam waveguide antenna is a type of complicated Cassegrain antenna with a long radio wave path to allow the feed electronics to be located at ground level. It is used in very large steerable radio telescopes and satellite ground antennas, where the feed electronics are too complicated and bulky, or requires too much maintenance and alterations, to locate on the dish; for example those using ...