What is a Phased Array?

What is 802.11b?

Why are Phased Arrays useful for wireless networking?

What are the limitations of phased arrays is wireless networking?

What would it take to implement a phased array in a wireless network?

What know-how is required?

What can we know about 4 antennas randomly placed?

How can this be used to make a wireless router?

Brain Dump by ColinDabritz Here were a few useful links. First, a great visual example of phased arrays (shockwave) http://www.explorescience.com/activities/Activity_page.cfm?ActivityID=49 and the always useful google search: http://www.google.com/search?query=phased%20array&num=10

SamChurchill add:

Commercial Phased Array Options

ArrayComm - combines adaptive antenna technology with a wireless network architecture optimized to deliver high speed Internet at an affordable price.

Adaptive Broadband - uses a rooftop transceiver with an antenna and an environmentally sealed box containing the radio, modem, MAC and Ethernet components which convert the wireless 5GHz from the cell site into the standard Ethernet delivered to the subscriber's PC.

BeamReach Networks - likes OFDM with adaptive beamforming antennas. It was given an FCC license for nationwide coverage at 2.3 Ghz. It gives operators non-line-of-sight, consumer-installable CPE, high data rates, and the ability to deploy large cells, serving a large number of customers with fewer base stations.

Flarion - plans to introduce PCMCIA modem cards for laptop computers and use IPV6. Their flash-OFDM technology, originated by Bell Labs, was developed as a means for mobile operators to offer IP-based broadband communications at low cost. It "is the first cellular link layer to be designed to truly mobilize the Internet, and is unencumbered by the architectural, protocol, and commercial legacies of the circuit-switched past". Partners include Cisco, Compaq, GTRAN, PacketVideo, Philips and others.

Iospan - developing "the first, mass-deployable fixed wireless broadband solutions that provide Non-Line-of-Sight (NLOS) delivery of high-speed residential and business IP services".

Radiant and Mesh Networks use neighboring nodes to connect. The FCC granted MeshNetworks an experimental license for national demonstrations in both the 2.4 GHz and 5.7 GHz bands.

Navini Networks - provides nomadic, zero-install, non-line-of-sight infrastructure to allow for anytime, anywhere Web access. Used by Sprint in a Houston test.


PhasedArray (last edited 2007-11-23 18:00:43 by localhost)