beamforming

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beamforming

Directing the signals on transmitter/receivers with multiple antennas such as 802.11n access points. The beamforming, which improves transmission speed, is accomplished by detecting the signals and sending feedback to the transmitter, which can adjust the phase and amplitude of the signals at its antennas. Beamforming can also work with transmitters that cannot cooperate in the process by detecting incoming signals and adjusting the receiving side. See MIMO, antenna diversity, WirelessHD and WiGig.


Beamforming Bounces Signals
With highly directional transmission, such as WiGig, beamforming can bounce the signals off walls and other objects in order to reach their destination. (Image courtesy of Wireless Gigabit Alliance, www.wirelessgigabitalliance.org)
References in periodicals archive ?
The outstanding image quality achieved through the EPIQ system's brand new nSIGHT architecture, which includes a new precision beamformer, can result in more robust quantitative ultrasound imaging.
The outstanding image quality achieved through the EPIQ system's brand new n SIGHT architecture, which includes a new precision beamformer, can result in more robust quantitative ultrasound imaging.
To change the directionality of the array when transmitting, a beamformer controls the phase and relative amplitude of the signal at each transmitter, in order to create a pattern of constructive and destructive interference in the wavefront.
Hoyos, Compressed digital beamformer with asynchronous sampling for ultrasound imaging, Proceedings of the 2013 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp.
Due to principle of beamformer operation its localization accuracy increases with increasing number of microphone units in the array but there is a problem how to process this large amount of digital sound data in a short time.
Speech perception in noise can be improved with the Griffiths/Jim adaptive beamformer (ABF) [144].
Another popular robust method is the subspace-based beamformer or the projection approach [10], which uses the orthogonal projection of the presumed steering vector onto the signal-plus-interference subspace, instead of the presumed steering vector.
A beamformer is used to control the transducer elements and determine the delay pattern and the pulse train that create the focal point.
In 2-D mode, the system uses the second harmonic signal to enhance tissue detail, using HP's exclusive ultraband transducer technology and digital beamformer.
The AESA design, which includes over 10,000 elements, is built from a silicon Transmit/Receive "Tile" containing 16 elements and beamformer electronics in a single chip.
The E&MD contract covers the first design and build activity related to the beamformer hardware that the Company is contributing to the program.
Theoretical part describes main principle of delay and sum type beamformer operation and its application in sound source localization system.