A laser is too directional, unless of course I can use a lens and spread it out a bit, but then I might be in the same situation as with IR LED's. Plus the receiver might still be very sensitive to sunlight. The transmitter should have about a 20 degree max, 10 degree min. side to side cone. The receiver should have very nearly 180 degree field of view, though I was hoping with radio I could possibly get an all around view.
I was worried about a directional transmitter needing a directional receiver. Is there any way around that?