Method for analyzing the resolution and/or the accuracy of a transmission unit and radar sensor

A radar sensor comprising a receiving unit, a transmission unit and a processing unit, said transmission unit being configured to transmit a transmitter signal, said receiving unit being configured to receive said transmitter signal transmitted by said transmitter unit and reflected from a target and said processing unit being configured to simulate at least one echo signal based on said received signal by delaying and/or frequency shifting said received transmitter signal, said processing unit being configured to determine a frequency difference of said received transmitter signal and said simulated echo signal, said frequency difference being a beat frequency difference in order to obtain a transform, said processing unit being configured to detect at least one maximum of said frequency difference in said transform, said processing unit being configured to determine spectral properties of said frequency difference in said transform, and wherein said processing unit is configured to output at least one quality parameter of said spectral properties as an output valve, said quality parameter indicating the quality of said transmission unit.