28-09-2010, 03:04 PM
ABSTRACT
Satellites have been a highly effective platform for multiform broadcasts. This has led to a revival of the radio era.The satellite radio is a natural choice to bridge the digitalgap. It has several novel features like selective addressing and error control. The value-added services from such systems are of particular interest.
Man has always been fascinated by the ‘heavenly voices’ from the skies. This fascination has manifested itself in many mythologies where he has received divine messages, warnings, and forecasts from the heavens. It was this undiminished fascination that kept him working towards the radio system. It was one hundred years ago that Marconi first transmitted the letter ‘S’ across the Atlantic Ocean. At that time, conveying information across such large distances was not as much a novelty as the new concept of broadcasting. While telegraphy was constrained by physical network of lines, radio reached a widespread, unidentified audience. With the evolution of technology, today, man-made satellites placed up in the skies are able to deliver not just messages but crystal-clear music and news directly to the listeners separated by huge geographical distances. The reception of these programmes on ground is possible using special satellite signal receivers.
Man has always been fascinated by the ‘heavenly voices’ from the skies. This fascination has manifested itself in many mythologies where he has received divine messages, warnings, and forecasts from the heavens. It was this undiminished fascination that kept him working towards the radio system. It was one hundred years ago that Marconi first transmitted the letter ‘S’ across the Atlantic Ocean. At that time, conveying information across such large distances was not as much a novelty as the new concept of broadcasting. While telegraphy was constrained by physical network of lines, radio reached a widespread, unidentified audience. With the evolution of technology, today, man-made satellites placed up in the skies are able to deliver not just messages but crystal-clear music and news directly to the listeners separated by huge geographical distances. The reception of these programmes on ground is possible using special satellite signal receivers.