"Low-frequency spectrum on a network as big as ours is a real notspot-killer, " he said.
Developed for secure government communications, Spitfire uses a broad frequency spectrum virtually immune to eavesdropping or interference.
The most important is worldwide radio-frequency spectrum, obtained by Iridium through international negotiations.
Higher frequency spectrum is the winner in this battle when combined with lots of pico and nano cell sites.
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This enables the HDVD 800 to transmit the entire frequency spectrum of high-end audio sources without any loss of frequencies.
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Networks using lower frequency spectrum tend to fare better in rural areas as their signals propagate better, especially in hilly areas.
State intervention is justified only by the chaos that would be caused by a free-for-all over the use of the frequency spectrum.
Cooper says in April 2003 the company will bid on some radio frequency spectrum about to become available from the Federal Communications Commission.
He notes that in an auction of higher-frequency spectrum in autumn 2006, many small companies paid relatively small sums for spectrum that later became much more valuable.
It now seems ready to pull the plug and more determinedly go forward in its LTE build out utilizing the extensive frequency spectrum that Clearwire has at 2.5 Ghz.
In the DOJ's opinion, an incumbent carrier would need to demonstrate both compelling evidence of capacity constraints and an efficient use of its current licenses in order to gain additional lower frequency spectrum.
The mobile firm has made no secret of its desire to get its hands on lower-frequency spectrum, which can cover much larger areas and offers better indoor coverage than the high-frequency spectrum it currently owns.
In its briefing, the DOJ made its case that the nation's two largest carriers currently hold market power, which is due to the heavy concentration of lower frequency spectrum (below 1, 000MHz) allocated to the two incumbents.
Furthermore, the LightSpeaker's 2.5-inch wide dispersion driver uses digital signal processing to optimize high- and low-frequency output for a full spectrum of sound.
Valicenti-McDermott M, et al. Frequency of gastrointestinal symptoms in children with autistic spectrum disorders and association with family history of autoimmune disease.
The freed-up airwaves in the proposal would mostly be unlicensed spectrum with "WiFi-like uses, " but at a much lower frequency than the 2.4GHz and 5GHz bands that WiFi needs today: as the first consistent, unlicensed spectrum at that range in the US, it could create opportunities for longer-ranged, free wireless that aren't even on the table in 2012.
Between them, Sprint and Nextel own nearly all the spectrum licences for the unused 2.5GHz frequency band.
Lamarr termed the technique "frequency hopping, " a forerunner of the spread-spectrum technology that is used today in communications applications such as Wi-Fi.
The cheapest way to increase capacity is to add more spectrum or to move a network to a lower frequency, which allows radio waves to penetrate walls more easily.
Now Charlie Ergen's DISH and Google's secretive efforts to test out 2.5 Ghz frequency activities point to the true value in Clearwire's rich spectrum position.
The technology uses gaps in radio spectrum, called 'white spaces', which exist in between frequency bands.
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Broadcom and Atheros say that making the interface information public would be illegal, because it could allow users to change the parameters of a chip in ways that violate the rules for using unlicensed spectrum (for example, by increasing its power or changing its operating frequency).
Add to this that not all spectrum is created equal due to varying characteristics and where it is located in terms of frequency.
Yet despite high costs of entry and regulatory limits on spectrum availability and infrastructure investment, new technologies (LTE, satellite, microwave, and higher-frequency communications) and new competitors continue to enter the market all the time.
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