Comparisons and Analyses Radar Systems Based on OTFS and OFDM

In this paper, a newly multicarrier signaling technique referred to as Orthogonal Time FrequencySpace (OTFS) with a radar detection system is presented for the next formation of radar projects, whichis called the OTFS-based radar system. As an advantage of the OTFS technique, it uses the delay-Doppler domain as the framework of its application where the delay-Doppler domain is employedwidely in radar and communication. The delay-Doppler domain in communication expresses thechannel properties, while in radar, it is used to distinguish moving targets by their Doppler (as velocity)and delay (as range) characteristics. Orthogonal Frequency Division Multiplexing (OFDM-) basedradar which is named as OFDM-based radar system is another well-known multicarrier candidate that isstudied by researchers. The OTFS and OFDM techniques utilize the whole frequency band to obtain thefull diversity for radar processing. But, OTFS has better performance in high mobility circumstances,and it requires shorter cyclic prefix (CP) compared to other multicarrier techniques, which enablestarget tracking and more range in radar. Employing MATLAB as the simulation software, performanceof the OTFS-based radar system in communication and radar is achieved and the compared outcomesare extracted in the simulation result section where the superiority of the OTFS-based radar systemin different terms is interpreted.

Keywords:

OTFS , OFDM , radar systems , range , velocity