CPC G01S 13/282 (2013.01) [G01S 13/48 (2013.01); G06F 3/03545 (2013.01); G01S 2013/468 (2013.01)] | 26 Claims |
1. A transponder for generating a predetermined delay of a first signal received at an object of interest in a radar-based object tracking system, the transponder comprising:
a receive antenna;
a receive amplifier configured for receiving, via the receive antenna, the first signal transmitted from a first radar;
a delay element configured for delaying the received first signal by a predetermined time delay;
a downconverter configured for mixing the received first signal with a first frequency source that operates with a frequency difference, wherein the frequency difference is a function of the predetermined time delay;
an upconverter configured for mixing the downconverted first signal with a second frequency source that operates with the frequency difference;
a transmit antenna; and
a transmit amplifier configured for transmitting, via the transmit antenna, a delayed first signal back to the first radar.
|