Doppler Resilient Integrated Sensing and Communication Waveforms Design

Abstract

Because Doppler resilience is limited in the existing joint design of Integrated Sensing And Communication (ISAC) waveforms, a new Doppler resilient ISAC waveform design is proposed based on a joint design. First, with the pulse train ambiguity function, a construction of the Doppler resilient pulse train is deduced, which is equivalent to designing a waveform with a very low integral sidelobe level in a correlation zone. Accordingly, to construct the Doppler resilient ISAC pulse train, an optimization problem is proposed that takes minimizing the weighted integral sidelobe level of the ISAC waveform as the objective function and takes the energy of the transmitted waveform, the peak-to-average power ratio, and the phase difference between the transmitted ISAC waveform and the communication data modulated waveform as constraints. Because the optimization problem is nonconvex, an iterative optimization algorithm based on the Majorization-Minimization (MM) framework is proposed to solve it. Nu­merical simulation experiments show that compared with the traditional ISAC waveform design method, the ISAC waveform proposed in this paper has higher Doppler resilience and a lower symbol error rate, and the detection performance of the ISAC system for moving targets is considerably improved without loss of communication quality.

Keywords

• integrated sensing and communication (isac) waveform
• doppler resilience
• integrated sidelobe level (isl)
• majorization-minimization (mm)
• symbol error rate (ser)