There distance between Earth and Mars varies between 50 - 400 million kilometers because of their orbits. Does this affect data transmission noticeably? I'd naively expect you could transmit 8x faster at the nearest point than the furthest because that's how the distance varies.
Does two-way communication with a Mars rover work better when we are closer?
I have one wireless base station in my house. When I take my laptop to the far end of the house, my signal strength goes down and/or errors may occur. Obviously home wifi has much different concerns such as obstructions and short range design. Distance to Mars varies much more than my laptop, but within a known range. Communication works because certain design considerations were made such as batching commands.
So I'm wondering how that affects communication with the Rover, as that is known today, but also thinking ahead to when/if we have a Mars colony. That would mean communication between a larger number of devices with more network applications that would have to account for the difference.
Would the connection bandwidth or latency change significantly between near and far end?
It is like a large scale cellular tower design where the distance to mobile antenna is variable within a range. Except that in this case, all mobile antennas are always together at the same varying distance and therefore communicate could be optimized for that known distance/latency.