A novel frame design for integrated communication and sensing based on position modulation

In this paper, a novel frame design for integrated communication and sensing is proposed. The proposed frame structure consists of Barker radar sequence and binary phase shift keying (BPSK) modulated data bits. The temporal position of the radar sequence is determined by a subset of incoming information bits. Therefore, in addition to target sensing; the radar sequence also carries data bits in the form of position modulation. Moreover, during the reception process channel estimation is also performed using the radar sequence thereby leveraging the function of pilots. The simulation results verify that the dynamic location of radar sequence does not effect the sensing performance; however, sensing is sensitive to the length of radar sequence. Moreover, the proposed scheme results in reduced bit error rate (BER) when compared to radar-communication frame without any position modulation.