Method in a radar system, radar system, and/or device of a radar system

A system having spatially-separated non-coherently operating transmitting-receiving units, the system comprising:

• at least one first non-coherent transmitting-receiving unit formed to generate a first signal and to transmit said first signal via a path,
• at least one further non-coherent transmitting receiving unit formed to generate a further first signal and to transmit said further first signal via the path
• wherein;
• the first transmitting-receiving unit is formed to form a comparison signal from the first signal and from the further first signal received from the further transmitting-receiving unit via the path,
• wherein the comparison signal comprises frequency information, phase information and amplitude information indicative of a difference between the first signal and further first signal receive from the at least one further non-coherent transmitting receiving unit via the path,
• the further transmitting-receiving unit is formed to form a further comparison signal from the further first signal and from the first signal received from the first transmitting receiving unit via the path, wherein the further comparison signal comprises frequency information, phase information and amplitude information indicative of a difference between the further first signal and the first signal received from the at least one first transmitting-receiving unit via the path, and
• the further comparison signal is transmitted from the further transmitting-receiving unit to the first transmitting receiving unit;
• wherein the first transmitting receiving unit is formed to form a comparison-comparison signal from said comparison signal and the further comparison signal, the forming the comparison-comparison signal comprising mixing or correlating a representation of the first comparison signal with a representation of the further comparison signal at least in part to compensate for variation between respective non-coherently operating oscillators in the at least one first non-coherent transmitting-receiving unit and the at least one further non-coherent transmitting-receiving unit.

An apparatus, comprising:

• a first non-coherent transmitting-receiving unit, and
• a signal generator and at least one antenna which are formed to generate a first signal and to transmit said first signal via a path,
• an arrangement which is formed to form a comparison signal from the first signal and from a further first signal received from a further transmitting-receiving unit via the path, wherein the comparison signal comprises frequency information, phase information and amplitude information indicative of a difference between the first signal and further first signal received from the further transmitting-receiving unit via the path, and further comprising at least one of
• (1) an interface which is formed to transmit the comparison signal to the further transmitting-receiving unit, or
• (2) an interface which is formed to receive such a further comparison signal, which is generated by the further transmitting-receiving unit, by means of transmission in the first transmitting-receiving unit;
• and
• wherein the system comprises a further comparison unit which is formed to form a comparison-comparison signal from the comparison signal formed in the same transmitting-receiving unit and from the comparison signal transmitted to said transmitting-receiving unit, the forming the comparison-comparison signal comprising mixing or correlating a representation of the first comparison signal with a representation of the further comparison signal at least in part to compensate for variation between respective non-coherently operating oscillators in the first transmitting-receiving unit and the further transmitting-receiving unit.