A communication system based on satellites has the benefits of covering large areas on the earth which cannot be done with the terrestrial links. A satellite based radio can cover seas, deserts and the high mountains. The only need of these unapproachable areas is a receiving antenna and a receiving device. Another advantage is that the satellite based network incorporate higher data bit rates.

Earlier terrestrial links were used for broadcasting amplitude and frequency modulated signals but now a day artificial satellites are being used. A radio satellite signal contains both the audio and video signals. The video signal contains the name of the song and the name singer. These two things are displayed on the receiving unit's LCD screen while is the song is being played. The benefit of this is that there is no interruption in between the songs. The listeners do not have to listen to the radio announcers for knowing the name of the movie and the singer. One feels as if he or she is listening to a compact disc of his or her own choice. Also the clarity of the sound is like that of a compact disc. There are many enhancements for the receiving unit which add to the pleasure of listening music like we can connect ear phones, amplifiers, sub woofers, woofers to our receiving unit. By connecting these gadgets we can convert our ordinary radio to a high tech home music system. Another benefit is that particular frequency channels are assigned to particular type of music. One does not have to wait for a song of his or her choice like a young school boy wants to hear latest songs of his choice while his grandfather want to listen to oldies. They do not have to wait on the same channel to hear the song of their particular choice. They can just flip to the channels of their choice by changing the frequency of the receiving unit.

The broadcasting end of the satellite radio works in the same way as the old radio stations did. The analog music signals are converted to the digital pulse code stream by using pulse code modulation and the analog to digital converters. The output of analog to digital converter is fed to the pulse code modulator. The digitized signal undergoes compression to save the frequency channels that is the bandwidth so that more and more number of channels can be transmitted for the satisfaction and enjoyment of the customers. The compression of signals is done with the help of a compressor. Compressor is an electronic circuit. Along with compressor other electronic devices like filters, samplers, etc. are used for the best signal transmission and reception.


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Tymon Hytem has worked in the electronics feild for the past 15 years. He enjoys helping people decide on electronic gadgets from finding the right phone for your business and can help you choose the perfect