----- Original Message ----- From: "Alan B. Pearce" To: "Microcontroller discussion list - Public." Sent: Wednesday, January 25, 2006 11:37 AM Subject: Re: Re[2]: [EE] 2.4 GHz over water??? > >I think so long as you have sufficient power and line of > >sight, you should be fine. You might however have a large > >problem with reflections. But that might be handled > >sufficiently by the radios firmware. > > Reflections will probably be your biggest problem. What you have to avoid is > a direct transmission path and a reflected transmission path that differ by > a half wavelength at the 2.4GHz frequency. It would be quite easy to have > this problem on calm water, as the reflection on the water will not be too > far from the R/C boat. The wavelength at 2.4 GHz is around 12.5cm = around 5 inches. Do you think that the boats are so stable that they are able to hold the positions so exactly that the waves will be compensated to zero? The most important thing is a tough protocol with error correction. Enrico -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist