Covert communication design based on Cooperative jamming technology

Wireless communication has a wide coverage in our daily lives. However, during the process of using wireless communication for information transmission, the transmitted information is easily stolen, causing significant damage to our information security. To address these issues, we have designed a digital filter using collaborative interference technology to achieve signal denoising and enhancement. Firstly, the target signal is subjected to noise processing to eliminate interference from eavesdroppers. Then, modulation and demodulation are performed at the signal-receiving port to restore the desired target signal. Finally, the noisy and denoised signal is compared with the target signal in the frequency domain and image. The experimental results show that Gaussian white noise can effectively reduce the reception performance of eavesdropping nodes and target nodes while separating this interference signal at the receiving node to achieve covert transmission of wireless communication.