University of Electronic Science and Technology of China

Science & Technology Department of Sichuan Province

Xinchen Xu

Jie Tang

Hong Wen

Liang Chen

Huanhuan Song

Kaiyu Qin

A method for physical layer secure transmission against an arbitrary number of eavesdropping antennas includes: S: communication between legitimate transmitter Alice and legitimate receiver Bob is confirmed; S: Alice randomly generates a key bit bwith Mbits, maps the key bit binto a key symbol K, and performs an XOR on the key bit band to-be-transmitted confidential information b to obtain an encrypted bits b; S: Bob transmits a pilot sequence to Alice, and Alice calculates a candidate precoding space W and transmits modulated symbol streams s=(s, . . , s) by using precoding W(e); S: Bob measures received signal strength of each antenna, estimates the corresponding antenna vector e, inversely maps the vector e to obtain key symbols and key bits, and demodulates the received symbol streams in sequence at each activated antenna to obtain demodulated ciphertext bits; S: Bob performs an XOR on observed key bits and the demodulated ciphertext bits to obtain the confidential information.

Growing community of inventors

Chengdu, China

Xinchen Xu