Satellite radio is one of the biggest improvements in broadcasting since the introduction of FM. Satellite radio transmission can be broadcasted for more than 35,000 kilometers (22,000 miles) with total clarity and high quality sound. You'll never have static interferences while using more than 100 radio stations. The idea behind satellite radio made an appearance in 1992, when the United States Federal Communications Commission granted a spectrum from the S band (the 2.3 GHz frequency) for Digital Sound Radio Service. The license to transmit in that band was allocated to Sirius Satellite Radio and XM Satellite Radio in The late nineties. Right now you will find 3 companies which offer satellite radio Sirius and also XM in Northern America and WorldSpace in Asia, Europe and Africa.
These firms offer distinct broadcasting methods, because the radio signal of each is actually proprietary. That means that you'll have to buy different hardware depending on your own subscription to one of these firms. Nonetheless, there are three features common to all or any satellite radio services: the satellites, the ground repeaters and the radio receivers. Different satellite radio companies broadcast the actual radio transmission in different ways. For example, XM satellite radio uses geostationary satellites that have orbits which are synchronized with the movement of Earth. These satellites can be found above the equator. In order to allow subscribers to get crystal-clear signals despite obstacles such as structures, hills or bridges, XM satellite radio service has fitted a network of repeater antennas that receive the radio transmission through the satellites and retransmit it to the clients receiver Sirius, on the other hand, uses satellites that have special elliptical orbits around Earth. This type of orbit permit satellites to get higher in the sky compared to geostationary satellites and this prevents loss of signal. This is definitely the reason Sirius has fewer terrestrial repeaters than XM.
Satellite radio providers have got digital broadcast centers where a lot of of music in digital format as well as CD format is actually kept. Radio programmers have the job of choosing which song has to be played at which time. There are lots of studios managed by digital radio firms where artists perform live. All songs plus material is transmitted to the satellites in digital format so that the signal contains extremely high quality sound. The transmission is encoded by the satellite and then retransmitted to the repeaters antennas, which then transmit it to the radio receiver that decodes it and also plays the sound. The entire procedure is very quick and also efficient. Satellite radio wouldn't be possible with out digital compression. Digital compression is a method that uses sophisticated algorithms to compress as much material as feasible for the available bandwidth. When you take a subscription to a satellite radio provider you'll need the appropriate radio equipment. Traditional radios cannot decode the signal received from satellites so you'll need special equipment.
The worldwide recognition of satellite radio has skyrocketed because of numerous technical breakthroughs which enabled manufacturers to provide the receivers at very attractive prices. The fact that satellite radio is actually commercial free for many of its channels is also a major selling issue.
![[Valid RSS feed]](http://www.archivedarticles.com/images/icon_Rss.png "XML Feed For RSS"){kind=icon}
Category Rss Feed
Print This Article
Add To Favorites