Improving loss resilience with multi-radio diversity in wireless networks
Proceedings of the 11th annual international conference on Mobile computing and networking
MobiSteer: using steerable beam directional antenna for vehicular network access
Proceedings of the 5th international conference on Mobile systems, applications and services
PPR: partial packet recovery for wireless networks
Proceedings of the 2007 conference on Applications, technologies, architectures, and protocols for computer communications
Symphony: synchronous two-phase rate and power control in 802.11 wlans
Proceedings of the 6th international conference on Mobile systems, applications, and services
Proceedings of the 8th ACM SIGCOMM conference on Internet measurement
Introduction to Space-Time Wireless Communications
Introduction to Space-Time Wireless Communications
Experimental characterization of sectorized antennas in dense 802.11 wireless mesh networks
Proceedings of the tenth ACM international symposium on Mobile ad hoc networking and computing
R2D2: regulating beam shape and rate as directionality meets diversity
Proceedings of the 7th international conference on Mobile systems, applications, and services
On the effectiveness of switched beam antennas in indoor environments
PAM'08 Proceedings of the 9th international conference on Passive and active network measurement
Cone of silence: adaptively nulling interferers in wireless networks
Proceedings of the ACM SIGCOMM 2010 conference
Pushing the envelope of indoor wireless spatial reuse using directional access points and clients
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Wireless multicast scheduling with switched beamforming antennas
IEEE/ACM Transactions on Networking (TON)
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WLANs have become an important last-mile technology for providing internet access within homes and enterprises. In such indoor deployments, the wireless channel suffers from significant multipath scattering and fading that degrades performance. Beamforming is a smart antenna technology that adjusts the transmissions at the transmitter to reenforce the signals received through multiple paths at the receiver. However, doing this requires the accurate estimation of the channel coefficients at the receiver and its knowledge at the transmitter which off-the-shelf WiFi clients are incapable of doing. In this work, we develop a novel procedure that uses Received Signal Strength Indicator (RSSI) measurements at the receiver along with an intelligent estimation methodology at the transmitter to achieve beamforming benefits. Using experiments in an indoor office scenario with commercial WiFi clients, we show that the scheme achieves significant performance improvements across diverse scenarios.