This paper examines the separation of wireless communication and radar signals, thereby guaranteeing cohabitation and acting as a panacea to spectrum sensing. First, considering that the channel impulse response was known by the receivers (communication and radar), we showed that the optimizing beamforming weights mitigate the interference caused by signals and improve the physical layer security (PLS) of the system. Furthermore, when the channel responses were unknown, we designed an interference filter as a low-complex noise and interference cancellation autoencoder. By mitigating the interference on the legitimate users, the PLS was guaranteed. Results showed that even for a low signal-to-noise ratio, the autoencoder produces low root-mean-square error (RMSE) values.

翻译：本文研究了无线通信信号与雷达信号的分离问题，从而保证两者的共存，并为频谱感知提供了一种通用解决方案。首先，在接收端（通信接收机和雷达接收机）已知信道冲激响应的条件下，我们证明了优化波束赋形权重可减轻信号引起的干扰，并提升系统的物理层安全性。进一步地，当信道响应未知时，我们设计了一种干扰滤波器，该滤波器是一种低复杂度的噪声与干扰消除自编码器。通过减轻对合法用户的干扰，物理层安全性得以保障。结果表明，即使在低信噪比条件下，该自编码器仍能产生较低的均方根误差值。