A novel PAPR reduction method for OCDM-based radar-communication signal

Waveform design for joint radar-communication system plays an important role in recent years. In this paper, we present an integrated radar and communication signal based on the orthogonal chirp division multiplexing (OCDM) signal which embeds communication data in each mutually orthogonal chirp radar signal. Furthermore, a novel approach is proposed to reduce peak-to-average power ratio (PAPR) of the joint signal. Part of the chirp tones are used to embed communication information, while the other tones are used merely to generate the peak canceling signal. Without extra spectrum occupy in conventional tone reservation (TR), the proposed method can make full use of spectrum resources. Simulation results show that the proposed method can efficiently reduce PAPR of the joint signal with decent radar and communication performance.