Try the following page
is an on-line calculator. Enter your data and see
if it gives a useful result.
You can find
Satellite Link Budget freeware using those 3 search
words in Google.
8 psk is just the modulation
encoding that enables the bandwidth for a certain
information rate on the serial datastream to be
calculated. It effects the Bit Error Ratio for a
particular value of Carrier Power/Noise Power and
convolutional coding/forward error correction. Ignore
it for now.
Any problems, just let us know.