Radar system and a radar method for replay resistant radar operations

Abstract

There is described a radar system () and a corresponding method, the radar system () comprising i) a control unit (), configured for generating a code (C) comprising a sequence of code symbols (), wherein generating the code (C) comprises randomly selecting a plurality of code symbols () from a code symbol pool () comprising a plurality of code symbols (), ii) a transmitter (), configured for generating a signal (S) from the code (C), and further configured for transmitting the signal (S), iii) a receiver (), configured for receiving an echo (E) of the signal (S), and iii) a correlator (), configured for correlating each code symbol of the code (C') of the received echo (E) of the signal (S) to a corresponding symbol template (R) associated with the correlator (); wherein the radar system () is further configured for synchronizing the symbol template (R) to the code (C) of the signal (S). There is further described a method of using a sequence of randomly selected code symbols () in a radar application, in particular an UWB-based radar application, to prevent replay attacks.