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September 14, 2004

U.S. Gets MobileTV via DVB-H

Datacasting over digital FM radio may also be used. The Digital Audio Broadcasting (DAB) standard is Europe's answer to digital radio. DAB requires an entirely new frequency, transmitter and receiver. The United States HD Radio system, on the other hand, multiplexes a digital radio on an FM subcarrier using current FM channels. Clear Channel FM Stations are going digital in a big way. But the capacity on the FM band for any additional data is constrained. Satellite radio competitors XM and Sirius have a bit more capacity on their a digital stream. But handheld satellite receivers aren't nearly as cheap and portable as terrestrial receivers.

Data-intensive, mobile applications may be better served by DTV or dedicated broadcast carriers (like Crown Castle's 1.4 GHz band), say industry observers.

Crown Castle says it already has the spectrum it needs to provide DVB-H broadcasts. Last year, Crown Castle quietly won a government auction, paying $12 million for an exclusive terrestrial license to use 5 MHz of U.S. L-band spectrum which extends from 1440 - 1790 MHz. It was previously used for weather balloon and weather satellite down-linking.


Posted by yatta at 12:13 PM