| 摘要 |
Method and apparatus for detecting position of a part of the body of a user. A wearable emitter unit (16) is worn by the user, the emitter unit being worn by at a location adjacent the part of a body of the user. A radio signal propagated from the emitter unit (16) is received by a receiving unit (14), at antennae (52). Differences in times of arrival of the radio signal at ones of four different pairs of the antennae (52) are determined and, from the detected differences, the three-dimensional position of the emitter unit, and thus the part of the body of the user, is determined. |
