Satellite radio is a type of digital broadcast that transmits audio signals to large areas with greater clarity and consistency than traditional radio. It is a subscription-based service that provides radio programs to listeners with specialized receivers, commonly found in automobiles and home stereo systems.
XM, Sirius and Worldspace are the three main providers of satellite radio in the United States. These services offer hundreds of channels of news, sports, entertainment, talk radio, and music in crystal-clear, commercial-free audio.
The satellite signal bounces off a number of different satellites in orbit, delivering a broadcast over a large area. The resulting signal is transmitted to ground-based repeaters to augment coverage in urban areas, where tall buildings can interfere with the signals.
Satellite radio offers a variety of programming you cannot get on terrestrial radio–including uncensored album cuts, live audio sports broadcasts and exclusive channels from popular radio hosts. Some radio stations also feature local music highlights and live call-in shows.
Some satellite radio stations use a variety of techniques to ensure quality reception, including robust diversity and signal coding. These technologies help to ensure reliable transmission of over one hundred audio channels, three video channels and a range of data services.
Satellite radio has become very popular, especially among people who enjoy listening to radio in their cars. It can also be used in a boat or RV, providing the ultimate in programming variety on vacation or on the water. Many satellite radio services now have apps that allow you to stream their content to your mobile devices, if you prefer.
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