wherein the radar system comprises a radar transmission unit, a radar reception unit, and a central unit which is connected to the radar transmission unit and the radar reception unit,

wherein the central unit comprises a signal generator configured to provide a periodic electrical base signal, wherein the frequency of the periodic electrical base signal continuously increases or decreases over time at least in a segment of each periodic cycle,

wherein the central unit comprises a modulator configured to modulate the electrical base signal onto an optical carrier signal and transmit the modulated optical carrier signal to the radar transmission unit via a first optical fiber,

wherein the radar transmission unit comprises an opto-electrical converter and a radar transmitter, wherein the opto-electrical converter is configured to receive the modulated optical carrier signal, convert it into an electrical radar driver signal and forward the electrical radar driver signal to the radar transmitter,

wherein the radar reception unit comprises a radar receiver, a mixer, a filter and an optical modulator,

wherein the mixer is electrically arranged between the radar receiver and the filter and mixes an electrical radar echo signal provided by the radar receiver with an electrical reference signal which is derived from an optical reference signal,

wherein the optical reference signal is optically received from the central unit via a second optical fiber,

wherein the filter filters the mixed signal and provides a filtered signal, said filter providing a second order high-pass filtering range,

wherein the optical modulator modulates the filtered signal onto a second optical carrier signal and transmits the modulated second optical carrier signal to the central unit via a third optical fiber, and

wherein the central unit further comprises a central opto-electrical converter and an evaluation unit, the opto-electrical converter being configured to convert the modulated second optical carrier signal into a corresponding electrical signal, and the evaluation unit being configured to evaluate the corresponding electrical signal and derive one or more distance values indicating the distance of one or more objects that are located in a predefined nominal distance range from the vehicle.