TRANSPONDER SYSTEM AND METHOD FOR MEASUREMENT OF SEPARATION

摘要

The invention relates to separation determination systems for determining the separation between a base station (BS) and a transponder (TR), whereby the base station (BS) comprises an oscillating signal source (OSZB), for the generation of a signal (stx(t)) and a transmission device (ANTB) for broadcasting the signal (stx(t)). The transponder (TR) comprises a receiving device (ANTT), for receiving the signal (erxt(t)) from the base station (BS), an oscillator (OSZT), for generating a signal (sOSZ(t)) which is phase-coherent therewith and a transmission device (ANTT), for broadcasting the phase-coherent signal (sOSZ(t)). The base station (BS) furthermore comprises a receiver device (ANTB), for receiving the phase-coherent signal (sOSZ(t)) from the transponder (TR) and a separation determination device (RXMIX, FLT, DEMOD), for determining the distance (dist) between base station (BS) and transponder (TR). According to the invention, the system and components may be improved whereby the oscillator (OSZT) in the transponder (TR) is energised with the received signal (srxt(t)) in order to generate a quasi-phase-coherent signal (sOSZ(t)).