FMCW swept-frequency sounding has been used within centralized spectrum management networks to provide real-time
channel evaluation (RTCE) for multiple HF circuits. Often referred to as “chirp” sounders, these devices provide the benefits associated with
ITU-R F.1337-1997 history
1997ITU-R F.1337-1997 Frequency Management of Adaptive HF Radio Systems and Networks Using FMCW Oblique-Incidence Sounding