The importance of spectrum as a communications enabler cannot be overstated. Television and radio broadcasting have a strong influence in shaping public perceptions on any issue, and have been used overtly for political propaganda.
The “beauty contest” method requires interested parties to submit proposals on how they intend to use the spectrum. A committee of the spectrum regulating agency then decides which of the proposals better serves public goals.
The two most popular means of granting access to licensed spectrum bands are through spectrum auctions and through so-called “beauty contests.”
The auction method is straightforward: interested parties bid for a given spectrum band; whoever commits the higher sum gets the right to use the frequencies.
The turning point, however, came in 1997 when the Institute of Electrical and Electronics Engineers (IEEE) approved the 802.11 Standard, the basis of what is now known as WiFi.
Although the main use of spectrum is for communication purposes, there are also other uses such as cooking food in microwave ovens, medical applications, garage door openers and so on.
Besides issues of national sovereignty defence, very strong economic and political interests play a determinant role in the management of spectrum, largely due to the rapidly increasing economic value of spectrum.
Our understanding of spectrum has changed a great deal since Marconi first spanned the Atlantic with his “wireless telegraph message”. In 1902, he used the whole spectrum available at the time to send a few bits per second over thousands of square kilometres.
The spark transmitter used for Marconi’s telegraph occupied all electromagnetic frequencies available to existing receivers.
There is no simple definition of spectrum. From a technical viewpoint, spectrum is the range of electromagnetic waves that can be used to transmit information.
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