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Author Kumar, Swarun ♦ Rahul, Hariharan ♦ Katabi, Dina
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Language English
Abstract We present JMB, a joint multiuser beamforming system, that enables independent access points (APs) to beamform their signals and communicate with their clients on the same channel as if they were one large MIMO transmitter. The key enabling technology behind JMB is a new low-overhead technique for synchronizing the phase of multiple transmitters in a distributed manner. The design allows a wireless LAN to scale its throughput by continually adding more APs on the same channel. JMB is implemented and tested with both software radio clients and off-the-shelf 802.11n cards, and evaluated in a dense congested deployment resembling a conference room. Results from a 10-AP software-radio testbed show a linear increase in network throughput with a median gain of 8.1--9.4×. Our results also demonstrate that JMB's joint multiuser beamforming can provide throughput gains with unmodified 802.11n cards.
Description Affiliation: Massachusetts Institute of Technology, Cambridge, MA (Rahul, Hariharan; Kumar, Swarun; Katabi, Dina)
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2005-08-01
Publisher Place New York
Journal Communications of the ACM (CACM)
Volume Number 57
Issue Number 7
Page Count 10
Starting Page 97
Ending Page 106

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Source: ACM Digital Library