Radar system with spatial filtering functionality, motor vehicle and method for operating the radar system

A method for operating a radar system, the radar system comprising at least one aperture with a first antenna and a second antenna and a signal source for generating radar pulses and an electronic control circuit, wherein the method comprises:

• in a first sequence:
• operating the first antenna as a TRX antenna that is connected to the signal source configured to transmit a first radar pulse into surroundings of the radar system, receiving at the first antenna a first reflected radar pulse impinging on the aperture from an external object and generating a first antenna signal from the received first reflected radar pulse,
• operating the second antenna as a RX antenna, receiving at the second antenna the first reflected radar pulse and generating a second antenna signal from the received first reflected radar pulse,
• in a switching step between the first sequence and a second sequence:
• connecting the second antenna to the signal source using a switch of the control circuit, and
• in the second sequence:
• operating the second antenna as the TRX antenna, transmitting at the second antenna a second radar pulse, receiving a second reflected radar pulse impinging on the aperture from the object and generating a third antenna signal from the received second reflected radar pulse,
• operating the first antenna as the RX antenna, receiving at the second antenna the second reflected radar pulse and generating a fourth antenna signal from the received second reflected radar pulse,
• at the electronic control circuit:
• at least one of combining and comparing at least one of the first antenna signal and the second antenna signal from the first sequence with at least one of the third antenna signal and the fourth antenna signal from the second sequence for generating an analysis signal, and
• detecting a spatial information of the object with regard to at least one of the aperture and a coherence information regarding the first radar pulse and the second radar pulse from the analysis signal.