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Multi-user MIMO ( MU-MIMO) is a set of multiple-input and multiple-output (MIMO) technologies for multipath wireless communication, in which multiple users or terminals, each radioing over one or more antennas, communicate with one another. In contrast, single-user MIMO (SU-MIMO) involves a single multi-antenna-equipped user or terminal ...
Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.
The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...
The Rift CV1 features integrated headphones that provide real-time 3D audio effects. This was developed from technology licensed from RealSpace 3D Audio, by Visisonics. The headphones are user-replaceable, with Oculus and other manufactures such as JBL providing aftermarket audio accessories. The CV1 was struck by a design flaw by which the ...
Precoding is a generalization of beamforming to support multi-stream (or multi-layer) transmission in multi-antenna wireless communications. In conventional single-stream beamforming, the same signal is emitted from each of the transmit antennas with appropriate weighting (phase and gain) such that the signal power is maximized at the receiver output.
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Or they can contact the National Highway Traffic Safety Administration ( NHTSA) Vehicle Safety Hotline at 888-327-4236 (TTY 800-424-9153), or go to www.nhtsa.gov, and note campaign number 23V-577 ...