| 摘要 |
<p>The present invention relates to a positioning system and method. The system and the method are particularly well-suited for indoor positioning of several idle objects or moving objects, preferably with very short time between two successive position determinations. According to the invention, two signals of different propagation velocities (preferably ultra-sound and radio frequency) are sent out by an object. Alternatively, the radio signal can be sent out from a central unit. Preferably the transmission takes place simultaneously. Based on the time difference between reception of the two signals at two or more base receivers, the position of the object relative to the basic positions is determined.</p> |
