G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
