If you'd take Earth and Mars, and at both their closest and furthest position (ignore the Sun being nearly in-between for a moment), what would be the maximum amount of bandwidth possible between these two objects, given an amount of noise and power?
I know in the future (possibly) there will be a colony on Mars, and as bandwidth demand with earth increases (first fairly linearly per colonist and data reporting back to earth, then logarithmically for leisure goals), I'm curious how data transmission would go, exactly.
(For completeness visualisation sake, lets say that after Mars becomes self-sustaining, and sets up infrastructure, there is one - or a set of - radio dishes on Mars' pole, which are able to stay in constant sight to either Earth's low-orbit or worldwide radio dishes (A-la DSN), and maybe 2 satellites orbiting in-between Earth's and Venus' orbits to proxy radio signals when the earth is behind the sun)
(Please note: I am not an expert on electromagnetic signals or similar, I just have a friend who spammed me eons ago about signal-to-noise ratio info, and I'm just echoing what I remember)
Edit: For clarification, I'm asking something along the lines of an output to the Shannon's Channel Capacity equation, with some examples of power inputs, and equivalents to those power inputs (e.g. how much 1KW is in today's world, and how much channel capacity/bandwidth (in bits) that'd create)