Artificial Noise Assisted In-Band Full-Duplex Secure Channel Estimation

摘要: This paper proposes a novel secure channel estimation technique to provide security against leakage of the estimates any malicious user by utilizing artificial noise (AN) along with full-duplex (FD) transmissions. AN overcomes drawback FD transmission, where strategically located eavesdropper can minimize interference signal received from receiver. The proposed comprises three stages, first stage is responsible for residual self-interference (SI) channel. second acquires rough design orthogonal between legitimate transmitter-receiver next training stage. In third stage, both nodes transmit signals known using For power allocation, we have presented local adaptive allocation algorithm at each node allocate powers signals, and while ensuring equivocation eavesdropper. We mean square error (MSE) indicate performance achieved respective nodes. also provided bit rate (BER) simulation analysis communication securing process. indicates that unable decode transmitted information receiver has robustly decoded information.