对调制识别网络隐身的雷达发射信号生成方法

The electronic reconnaissance system in radar countermeasure scenarios greatly improves the recognition accuracy of radar signals by introducing an intelligent pulse modulation recognition network based on deep learning methods. In order to improve the modulation stealth and anti-recognition ability of radar signals, a radar transmission signal generation method that can make the deep recognition network make incorrect predictions is proposed. Firstly, the time-frequency spectrum of the signal is obtained through short-time Fourier transform (S T F T). Then, a time-frequency spectrum carrying modulated stealth information is generated iteratively. Finally, the improved inverse STFT is used to obtain the time-domain modulated stealth transmission signal. The radar signal generated by the proposed method is invisible to the modulation recognition network input from the time-frequency map, and can achieve pulse compression processing of the echo signal. The simulation results verified the effectiveness of the generated signal in resisting recognition, noise robustness, and pulse compression feasibility.