Satellite radio is one of the biggest improvements in broadcasting since the introduction of FM. Satellite Radio signals can be broadcast to more than 35,000 kilometers (22,000 miles) with a clarity and a high quality sound. You'll never static interference when listening to more than 100 radio stations. The idea of satellite radio came in 1992 when the United States Federal Communications Commission granted a spectrum of the S-band (2.3 GHz) to Digital Audio Radio Service. The broadcasting license in this band was attributed to Sirius Satellite Radio and XM Satellite Radio in 1997. Now there are three companies that provide satellite radio around the world: Sirius and XM in Northern America and WorldSpace in Asia, Europe and Africa.
Each of these companies offer different broadcasting systems, since the radio signal of each is proprietary. This means you will have to buy different hardware depending on your subscription to any of these companies. However, there are three components common to all radio services by satellite: satellites, terrestrial repeaters and radio receivers. Different radio stations broadcast satellite radio signal in different ways. For example, XM satellite radio uses geostationary satellites which have orbits that are synchronized with the movement of the Earth. These satellites are located above the equator. To allow subscribers to receive a clear signal despite obstacles such as buildings, hills or bridges, for XM Satellite Radio has installed a network of repeater antennas that receive radio signals of the satellites and retransmit it to subscriber receiver Sirius, on the other hand, uses satellites that have elliptical orbits around the Earth. These kinds of orbits allow satellites to get higher in the sky than geostationary satellites, which prevents the loss of signal. That's why Sirius has fewer terrestrial repeaters for XM.
Satellite radio services have digital broadcast centers where a large amount of music in digital format, as well as CD format is recorded. Radio programmers have the task of choosing the song to be played at that time. There are also plenty of studios managed by digital radio companies where artists perform. All songs and material are transmitted to satellites in digital format so that the signal contains very high quality sound. The signal is encoded by the satellite and retransmission to the repeaters antennas, which transmit to the radio receiver that decodes and plays the sound. The whole process is very fast and reliable. Satellite radio would not be possible without digital compression. The digital compression is a technique that uses sophisticated compression algorithms as much material as possible on the available bandwidth. Once you make a subscription to a provider of satellite radio, you will need the appropriate radio equipment. The radios can not decode the signal received from satellites so you will need special equipment.
The popularity of satellite radio has exploded due to many technological advances that have allowed manufacturers to offer the receivers at very attractive prices. The fact that satellite radio is commercial free for many of its channels is also an important selling point.
Each of these companies offer different broadcasting systems, since the radio signal of each is proprietary. This means you will have to buy different hardware depending on your subscription to any of these companies. However, there are three components common to all radio services by satellite: satellites, terrestrial repeaters and radio receivers. Different radio stations broadcast satellite radio signal in different ways. For example, XM satellite radio uses geostationary satellites which have orbits that are synchronized with the movement of the Earth. These satellites are located above the equator. To allow subscribers to receive a clear signal despite obstacles such as buildings, hills or bridges, for XM Satellite Radio has installed a network of repeater antennas that receive radio signals of the satellites and retransmit it to subscriber receiver Sirius, on the other hand, uses satellites that have elliptical orbits around the Earth. These kinds of orbits allow satellites to get higher in the sky than geostationary satellites, which prevents the loss of signal. That's why Sirius has fewer terrestrial repeaters for XM.
Satellite radio services have digital broadcast centers where a large amount of music in digital format, as well as CD format is recorded. Radio programmers have the task of choosing the song to be played at that time. There are also plenty of studios managed by digital radio companies where artists perform. All songs and material are transmitted to satellites in digital format so that the signal contains very high quality sound. The signal is encoded by the satellite and retransmission to the repeaters antennas, which transmit to the radio receiver that decodes and plays the sound. The whole process is very fast and reliable. Satellite radio would not be possible without digital compression. The digital compression is a technique that uses sophisticated compression algorithms as much material as possible on the available bandwidth. Once you make a subscription to a provider of satellite radio, you will need the appropriate radio equipment. The radios can not decode the signal received from satellites so you will need special equipment.
The popularity of satellite radio has exploded due to many technological advances that have allowed manufacturers to offer the receivers at very attractive prices. The fact that satellite radio is commercial free for many of its channels is also an important selling point.
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