Facts About How a satellite radio works

March 1, 2012 · Posted in Art 

Satellite radio is one of the biggest improvements in broadcasting because the introduction of FM. Satellite radio signal could be broadcasted for more than 35,000 kilometers (22,000 miles) with complete clarity and high quality sound. You will never get static interferences while playing over 100 radio channels. The thought behind satellite radio has appeared in 1992, once the United States Federal Communications Commission granted a spectrum in the S band (the 2.3 GHz frequency) for Digital Audio Radio Service. The license to broadcast in this band was allocated to Sirius Satellite Radio and XM Satellite Radio in 1997. Now there are three companies that provide satellite radio on the globe: Sirius and XM in Northern America and WorldSpace in Asia, Europe and Africa.

Each of these companies offer different broadcasting systems, because the radio signal of each is proprietary. Because of this you will have to buy different hardware based on your subscription to one of these companies. However, there are three components present with all satellite radio services: the satellites, the floor repeaters and the radio receivers. Different satellite radio companies broadcast the air signal in different ways. For instance, XM satellite radio uses geostationary satellites that have orbits that are synchronized with the movement of Earth. These satellites are situated above the equator. In order to allow subscribers to receive crystal-clear signal despite obstacles including buildings, hills or bridges, XM satellite radio service has installed a network of repeaters antennas that get the radio signal from the satellites and retransmit it to the subscriber’s receiver Sirius, on the other hand, uses satellites that have unique elliptical orbits around Earth. These types of orbits allow satellites to get higher in the sky than geostationary satellites and this prevents lack of signal. This is the reason why Sirius has fewer terrestrial repeaters than XM.

Satellite radio services have digital broadcast centers where a huge amount of music in digi pics as well as CD format is stored. Radio programmers hold the task of selecting which song needs to be played at which time. There are also a lot of studios managed by digital radio companies where artists perform live. All songs and material are transmitted to the satellites in digital format so your signal contains very high quality sound. The signal is encoded with the satellite and then retransmitted to the repeaters antennas, which in turn transmit it to the radio receiver which decodes it and plays the sound.

Your entire process is very quick and reliable. Satellite radio couldn’t survive possible without digital compression. Digital compression can be a technique that uses sophisticated algorithms to compress all the material as possible on the available bandwidth. After you make a subscription to a satellite radio provider you will want the appropriate radio equipment. Traditional radios cannot decode the signal received from satellites which means you will need special equipment.

The popularity of satellite radio continues to grow due to many technological advancements that enabled manufacturers to own receivers at very attractive prices. The fact that satellite radio is commercial free for many of its channels is also a major selling point.

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