Integrated Radar-Communication Waveform Design for Multi-Transmit in Clutter

The paper focuses on the joint design of transmit steering vectors and receiver filters for integrated radar-communication waveforms in clutter. The primary objective is to maximize the output signal-to-clutter-plus-noise ratio (SCNR) to ensure optimal target detection performance and enhance communication transmission quality. To maximize transmitter efficiency, we utilize an alternating projection (AP) algorithm to restrict the peak-to-average power ratio (PAPR) of the transmitted waveform. To reduce the mutual interference of multiple transmitted signals in space, we propose the information data weight (IDW) to form interference direction nulls to ensure spatial orthogonality. To obtain multi-tranmit orthogonal constant modulus integrated waveforms, we propose a weighted autocorrelation integrated sidelobe (WAISL) method to improve signal isolation ratio, assuming knowledge of the clutter and target spectral distributions. Finally, the clutter is suppressed by establishing the maximum SCNR constraint function. The simulation results demonstrate that the designed integrated waveform not only fulfills the multi-functional requirements but also enhances the survivability of the radar waveform in clutter and the robustness of communication transmission.