At The Same Time, Research On The Key Technology Of Anti-jamming In The Same Frequency Full-duplex Wireless Communication

In the extreme spectrum denied environment,the intense random and sudden jam would significantly degrade the performance of the full duplex systems and even break off the communication.This paper focused on the anti-jamming full duplex systems in denied environment and proposed a novel radio frequency(RF)self-interference cancellation(SIC)technique based on the orthogonal coding at the RF front-end and a novel digital SIC technique in the frequency-agility mode.The RF SIC technique can mitigate the jam while cancelling the self interference,which could avoid the saturation and block of the RF front-end.The digital SIC technique is adapted to the frequency-agility mode with low online computational complexity and good performance.This paper illuminated and proved the feasibility of the two techniques in theory,simulations and experiments.The system test results demonstrate that with the proposed techniques,the system can mitigate about 60 dB self interference and 25 dB Jam in the RF domain and 40 dB self interference in the digital domain,which fulfils the requirement.The research lays a good foundation for the future works.