Hi!
My question would be about GSM repeaters.
When you install GSM band selective repeaters, what about zones that are covered both by repeater and donor BTS site? For example, when you have in-building solution with GSM repeater, some of the "repeated" signal will go out of building and mix with existing signal on same channel. This is impossible to avoid, because you cannot set boundaries to signal.
So my question is: is 12dB margin enough to avoid potential problems? does receiver see both signal but consider it as multipath fading? is there any problems that I'm not aware of?