Hello All,
Modulation is used to transport a signal on a carrier. In the earlier days frequencies were low and for sat. transmission they had to be mounted on a carrier. But today the freq. that is used for communication is so high that it is a carrier in itself. Eg. a gigabit LAN passes data in gbytes per second. Someone told me, in China they use terabit LAN. Sat. freqs. are also in GHz. Nowadays digital formats in broadcasting have narrowed bandwidth utilisation yet provide high volume content. They are able to cut down on side bands.
Can we have a satt. carrier signal that is a fixed frequency but is made up of a constant data train? As of now, what is the highest download speed achieved by satt. internet? What is the highest speed currently available in the satt. 'pipes' that big corporates use for international inter-office links?
Anyway, this is the technical part which will be looked after by satt. designers and other techies.
What I want to know mainly is whether the concept of having such a ***high speed-high volume-repeatitive-serial file download facility*** is acceptable and worth implementing. Many have mistaken this for another television broadcast. It will be similar but not the same. TV is only live entertainment. This is a normal serious ultra high speed file download system for the common man at a very low monthly rental, for an *infinite number of users* within the footprint. That is the whole issue. How good and usefull is this idea?
If the Govt. opens up the airwaves to private net operators then the entire 58 (60 - existing 2) terrestrial TV channel spectrum could be utilised for digital serial file broadcasting in a similar way but at a lower download speed than a satt.. Major companies like Red Hat, Novel, Microsoft and many many others can provide their heavy software files on the airwaves to be downloaded in our homes and offices in a fast and economical way. No wiring, no cable.
Regards, Rony.
----- Original Message ----- From: "Srinivasan Krishnan" skrishnan@primus.ca
Wouldn't this be modulation?