Short impulse radio traditionally used for radar.
What is Impulse-Radio Ultra-Wideband (IR-UWB) Radar Technology? - everything RF
Proposed usage in satellite communication (using extremely short impulses: picoseconds) as it can achieve lower nonlinear distortions and phase noise, using special waveform and modulation.
Read more about this here: Waveform design solutions for EHF broadband satellite communications (2015)