Theoretical assumption: I have multiple CDMA transmitters operating at same frequency and code placed 5 metres apart. My questions:

1. Does the chances of my receiver receiving the data improve? That is to say does the snr of signal improve at receiver placed 40km away ?
2. What is the signal strength at any point in space? is it vector sum of strength of both signals received from both transmitters?
3. Can destructive interference happen at that point in space due to signal strength from multiple sources being out of phase at that point?
4. Does the receiver frequency tracking loop need to shift from one transmitters signal to other , if at all any changeover between two signals from different sources does happen ?