The present disclosure provides a radar front end chip that includes a plurality of encoders, each encoder of the plurality of encoders to receive a digitized radar signal and to encode the digitized radar signal with a phase code to generate one of a plurality of phase-coded digitized radar signals. The radar front end chip also includes a combiner to combine the plurality of phase-coded digitized radar signals into a digital radar data stream for transmission to a central radar processor.

The present invention relates to a system for determining a distance, a transponder, a position detection apparatus, and a method therefor. The method for determining a distance comprises providing a position detection apparatus (101), and a transponder (105). The method further comprises generating (201) a pseudo number sequence, transmitting (202) the pseudo number sequence, receiving (203) the pseudo number sequence; modulate (204) the received pseudo number sequence by means of delaying the recieved pseudo number sequence a predetermined number of clock cycles from a group of at least two predetermined number of clock cycles. The method further comprises transmitting (205) the modulated pseudo number sequence, recieving (206) the modulated pseudo number sequence, detecting (207) a path time of the pseudo number sequence, by means of delaying and correlating the generated pseudo number sequence with the received modulated pseudo number sequence, wherein the delay time corresponds to the path time, The method further comprises detecting (208) a clock correction factor for the transponder (105) using the received modulated pseudo number sequence, calculating (209) a flight time of the pseudo number sequence between the position detection apparatus and the transponder by means of the path time, the clock correction factor, and the predetermined number of clock cycles of the transponder, and calculating (210) the distance between said position detection apparatus and said transponder by means of the flight time.

The present disclosure provides a radar front end chip that includes a plurality of encoders, each encoder of the plurality of encoders to receive a digitized radar signal and to encode the digitized radar signal with a phase code to generate one of a plurality of phase-coded digitized radar signals. The radar front end chip also includes a combiner to combine the plurality of phase-coded digitized radar signals into a digital radar data stream for transmission to a central radar processor.

A radar sensor for sensing the level of a product or the topology of the surface of a product having a continuously operated clock that closes a power supply line to the processor at a predetermined time to activate the processor. Thereupon, the processor controls the switching arrangement to activate the radar chip.