Body motion tracking system

摘要: Methods and apparatus are disclosed for measuring position motion of a “marker” antenna (14), disposed on subject (12) at physical location to be tracked. Relative distance the marker (14) from receiving antennas (18) is measured by phase differences its microwave signals (40) least two successive positions. Alternatively, actual distances (104, 106) calculated choosing source (102) iterating until match those measured. Four six positioned edges volume (16) where activity conducted. Each received signal amplified down-converted in mixer (44). A single reference oscillator (46) feeds all mixers (42) preserve relationships signals. Received digitized presented multi-channel digital tuner (50). Phase preserved because processing up this step “coherent”. The data fed (51) main computer processed algorithm estimate antenna's relative each (18). especially applicable clinical gait analysis, sports medicine, industrial, military entertainment uses.