Something similar and very interesting that's used by ham radio operators every day: Automatic Link Exchange[1]. The system dynamically monitors many different

Something similar and very interesting that's used by ham radio operators every day: Automatic Link Exchange[1]. The system dynamically monitors many different frequencies (which have different propagation characteristics) to determine the best way for two parties to communicate, and automatically makes the connection. This is different from what DARPA needs, but still somewhat similar and definitely interesting. It's also one of the newer things in ham radio that a lot of hams don't know about. 1. http://hflink.com/alehamradio/ http://hflink.com/alehamradio/