Near-Far Revealed - 2/2

WiFi networks are my focus, and we'll look into those. Of course that there will be some kind of interference when we put devices that are using the same frequency to to talk to each other, which are not in the same network. But if we put then into different 802.11 channels, would they still suffer interference from the others? The answer is no, and yes. If they are able to avoid the power of the in-between device(s), they will do fine. But that doesn't happen very often. My tests and observation have shown that it's more likely to have a failed communication than a correct one. And that depends mostly on two factors: power and distance. Referring to the in-between device, higher power makes communication more difficult, but greater distances (to the transmitter) will make communication easier.

That's because the power received by the elements is greatly influenced by the distance, as it is reduced by the square power of the distance.
The surprise is that should not affect different channel transmitters, which is something that hasn't been correctly measured by device developers teams. As ad-hoc networks and mobile devices with access to 802.11g become more popular, this problem will be seen many more times, and could be addressed as soon as possible to prevent major difficulties. Specialists say that's happening because frequency filters that are now being used are not so sharp, or good, as they should be, but improving them implies in greater costs, which is something none wants right now.

Well, more on that someday...

Part 1