System Level Synchronization of Phase-Coded FMCW Automotive Radars for RadCom

Abstract

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Experimental Investigation of Phase Coded FMCW for Sensing and Communications

“…To extract the communication signal, the delay between transmitted and received signal needs to be compensated. In [7], synchronized LFMCW signal is generated to minimize the delay by using GPS. Similarly, we assume the synchronized LFMCW is obtained in the receiver and used for dechirping as shown in Figure 4.…”

“…Both of these two functionalities use the available spectrum and hence operating multiple autonomous driving vehicles on the road causes spectral congestion [3]. To cope with this problem, various waveform designs are investigated to combine sensing and communication functions [4]- [7]. One of the cost efficient solutions is to use available radar waveform on autonomous driving systems and modulate it with the communication signal to provide joint sensing and communication.…”

Automotive radar interference study for different radar waveform types

“…In this section we demonstrate the experimental results. Using commercially available off-the-shelf (COTS) automotive radar sensors, multiple NXP automotive radar chipsets and their microcontrollers (TEF810X and S32R274) were programed for phase coding as described in [27] and were synchronised to simulate the worst case scenario as described in [24]. The experimental setup included victim radar, interfering radar, and controlled stationary and moving targets as shown in Figure 4.…”

“…Recently, there has been growing interest in the phase-coded frequency-modulated continuous waveform (PC-FMCW) radar [21][22][23]. The idea of using phase coding for FMCW enables radar-communication (RadCom) coexistence [24]. Moreover, the PC-FMCW enhances mutual orthogonality between waveforms and can be used for interference mitigation [25].…”

Phase-Coded FMCW Automotive Radar: Application and Challenges

“…In this paper, only a single radar has been used to demonstrate the successful phase coding as well as the sensing performance of PC-FMCW radar. Realtime synchronization of multiple radars and extraction of communication information are not in the scope of this paper (the interested reader is referred to [8]) .…”