Livable Cities of the Future Proceedings of a Symposium Honoring the Legacy of George Bugliarello (2014) / Chapter Skim
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Impacts of Evolving Wireless Communications--Theodore S. Rappaport
Impacts of Evolving Wireless Communications--Theodore S. Rappaport
Pages 131-138
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From page 131... ...
First is cellular, which uses licensed spectrum bands for which companies pay billions of dollars. Cellular spectrum is owned and controlled by federal governments and tightly regulated to ensure a lack of interference from unauthorized users; cellular carriers invest billions of dollars in infrastructure to make the service work in "protected" bands while collecting revenues from a large subscriber base.
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From page 132... ...
While 4G LTE cellular technologies promise unprecedented cell phone data rates, the expected data demands for consumers are increasing at a much greater rate than the development cycle of technological standards. As discussed further in this article, there is an enormous opportunity for the wireless industry to leapfrog existing capacity limitations by using much greater radio spectrum allocations than have previously been available.
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From page 133... ...
Technology standards known as IEEE 802.11ac and IEEE 802.11ad, and new industrial Figure 1and standards called Wi-Gig and wave spectrum is viable for bothmany gigabits per consortia shows that the millimeter wireless HD, are bringing data rates to outdoor mobile radioThese technologies have been developed to operate at an order of magnitude higher second (Gbps)
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From page 134... ...
Today there are even more breakthrough technologies that combine MIMO and much higher frequency bands. Technology standards known as IEEE 802.11ac and IEEE 802.11ad, and new industrial consortia and standards called Wi-Gig and wireless HD, are bringing data rates to many gigabits per second (Gbps)
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From page 135... ...
. A UC Berkeley spinoff company, SiBeam, helped pioneer 60 GHz broadband wireless devices and was sold in 2011 FORWARD CHALLENGES: THE WAY to Silicon Image, a publicly traded company that makes 135 chips, including wireless HD.
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From page 136... ...
The myth in the industry is that if you go up higher in frequency, radio signals will not bounce off building walls or you will not be able to make electrically steerable antennas that can exploit the propagation characteristics at low enough cost. But at NYU WIRELESS we have shown through our measured propagation data that cellular can function effectively at these higher millimeter wave frequencies (close to the spectrum bands used by WiGig and wireless HD)
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From page 137... ...
With it, wireless will enable us to deploy computing and communication networks much more reliably and much more power efficiently than today. Finally, on the topic of interoperability, especially for public safety users and future Wi-Fi and cellular users, there is an exciting field called cognitive radio, which calls for smart signal processing and being able to make radios work adaptively.
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From page 138... ...
2013. Millimeter wave mobile communications for 5G cellular: It will work!
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