From time to time here in the forum are messages gets posted about radio communication with quadcopters. So called “radio modems” are used for a “robot to groundstation”-communication. But the more appropriate term would be software defined radio, because it has always to do with ham radio and shortwave communication.
I think, the robotics community has no choice than learn some of the vocabulary used in the amateur radio community, for example JT65 for distance communication and GNU radio for converting audio signals. The main problem seems to be, that it is not possible to utilize a full blown amateur radio station for a small sized quadcopter. A typical shortwave device has a power consumption of 100 Watt and needs lots of space. So my question is, can this be scale down to an USB stick with a simple antenna but provides transmitting facilities to a robot? As far as i know, radio amateurs are often use the RTL2832 chipset which is sold in DVB-T sticks but I'm unsure if it's possible to send a signal with it, or is this more a passive scanner?