In an industry where lack of spectrum imposes an enormous barrier to entry, cellular telephony in the United States could become an anticompetitive duopoly.
The reason why the leftist flagship Air America Radio almost ran aground last year was not because of lack of spectrum but because of lack of talent and good management.And radio spectrum is only the beginning of it.
Spectrum sharing networks are initiated by the apparent lack of spectrum under the current spectrum management policies.
In fact, the interference problem can be extremely intractable in a dense deployment scenario due to the lack of spectrum resources.
Due to lack of spectrum resource, SUs periodically detect whether the licensed band is being used by PU; if a spectrum hole is found, they use different sub-channels of the band to transmit.
So visible light communication not only has the potential to solve the problem of lack of spectrum space, but can also enable novel applications.
Due to lack of spectrum at 8.41 GHz X-band, future high-rate deep space missions will use 32 GHz Ka-band.
The F.C.C. has been asked by Congress to encourage broadcasters to sell UHF, or ultrahigh frequency, spectrum, which is great for mobile data, to wireless carriers that have complained about a lack of available spectrum as United States consumers use increasingly more data.
"The lack of adequate spectrum is killing the quality of users' experience," he said.
However, Wi-Fi is slowly being rolled out across Britain, though implementation of the more powerful WiMAX, with a longer reach, is hampered by lack of suitable spectrum.
