How can i calculate the bandwidth of a satellite-channel for digital TV broadcast ?

Answer 1

Keep in mind that the channels undergo heavy, heavy coding and compression algorithms, which is the beauty of digital signals.

I'm not positive about the specifics for how satellite-channels are split up, but in the case of satellite radio, all of the channels are coded and compressed together and sent down as a single bit stream. Then your receiver decodes and decompresses it to create all the channels available to you. This allows the companies to add additional channels by simply improving their compression algorithms, versus having to somehow increase the satellite bandwidth - which is pretty hard to do since they're flying at a height of 22 thousand miles.

Answer 2

I'm not sure you can. Digital satellite signals aren't like the old analog type signals. With an analog signal, you have one signal per transponder. With a digital signal you can have 10 simultaneous signals (or more) on the same transponder because the digital signals have distinct addresses.

This, of course, assumes you have a balanced input to the transponder... on occasion, some technician will bring up a signal and it's too strong (a 100 watt transmitter is typical as opposed to a 1000 watt transmitter for analog transmissions) and when the signal is too strong it can interfer with the other signals on the same transponder... which is why you sometimes see a signal break up for no apparent reason.

Back to your question... if you're watching the transponder with a spectrum analyzer when you fire up your transmitter, you can see the signal add but it's a digital 'carrier' and any bandwidth it may have depends on the bandwidth of the receiver and not the transmitted signal.

Answer 3

Look for the specifications for digital TV. they got to be in there or they will tell you where to look.

F.Y.I. Shannon's theory will tell you the theorictal capacity of the channel. Capacity is in units of bit*Hz. Bandwidth is in Hz

Answer 4

shannon's theory