Cellular vehicle communication systems
Cellular communication over 3G or 4G networks has several advantages, such as ease of use and the fact that the required infrastructure has already been provided by the mobile operator. However, the user therefore has no control over the network. Coverage and quality of service are also dependent on geographical location and may be non-existent in particularly remote areas.
Analogue communication radios for unmanned vehicles
Analogue radio, using frequency modulation (FM) technology and radio frequency (RF) signals, can be used for control of an unmanned vehicle as well as for streaming of images and PAL or NTSC video. The analogue signals are susceptible to noise and do not deliver as clear image quality as other methods, but have the advantage of low latency, as well as gradual signal degradation as opposed to a sudden unannounced cutoff.
Commtact Wireless-Digital Data Link for Drones
Digital radio communications
Digital radios usually operate over IP networks, giving them the security and flexibility of IP communications. The technology requires large amounts of processing power, which can make SWaP (size, weight and power) issues a challenge for UAVs and other space-constrained unmanned systems. Range and visibility can be affected by obstacles such as tall buildings and trees, which is an especially problematic for ground-based systems such as UGVs (unmanned ground vehicles).