Satellite radio is definitely one of the biggest enhancements in broadcasting since the introduction of FM. Satellite radio signal can be broadcasted further than 35,000 km's (22,000 miles) with complete clarity and high quality sound. You will never get static interferences while using over 100 radio channels. The concept behind satellite radio came out in 1992, when the United States Federal Communications Commission granted a spectrum of the S band (the 2.3 GHz frequency) for Digital Sound Radio Service. The actual license to broadcast in that band was allocated to Sirius Satellite Radio and also XM Satellite Radio in The late nineties. Now there are 3 firms which give satellite radio Sirius and XM in Northern America and WorldSpace in Asia, Europe and also Africa.
Each of these companies offer distinct broadcasting systems, because the radio transmission of each is actually proprietary. This implies that you will have to purchase different hardware according to the subscription to one of these companies. However, there are 3 components common to all or any satellite radio providers: the satellites, the ground repeaters and the radio receivers. Different satellite radio firms broadcast the radio signal in different ways. For instance, XM satellite radio makes use of geostationary satellites which have orbits that are synchronized with the movement of Earth. These satellites can be found over the equator. To be able to enable clients to receive crystal-clear signals regardless of obstacles such as buildings, mountains or even bridges, XM satellite radio service has fitted a network of repeater antennas which get the radio transmission from the satellites and retransmit it to the clients receiver Sirius, on the other hand, uses satellites that have special elliptical orbits around Planet. This type of orbit allow satellites to get higher in the heavens compared to geostationary satellites and that prevents loss of transmission. This is actually the reason Sirius has less terrestrial repeaters than XM.
Satellite radio services have digital broadcast centers where a lot of of music in digital format as well as CD format is stored. Radio programmers have the job of selecting which song needs to be played at which time. There are actually a lot of studios maintained by digital radio companies where artists perform live. All songs plus material is sent to the satellites in digital format so the transmission contains extremely high quality sound. The transmission is encoded by the satellite and also then retransmitted to the repeaters antennas, which then transmit it to the radio receiver that decodes it and also plays the sound. The entire process is actually extremely quick and reliable. Satellite radio would not be feasible with out digital compression. Digital compression is a method which uses complex algorithms to shrink as much material as possible for the available bandwidth. When you get a subscription with a satellite radio service provider you'll need the appropriate radio equipment. Regular radios cannot decode the transmission obtained through satellites so you will need special equipment.
The worldwide recognition of satellite radio has skyrocketed due to numerous technical advancements which enabled manufacturers to offer the receivers at very attractive prices. The fact that satellite radio is actually commercial free for many of its channels is also an important marketing issue.
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