Physical layer secure communication against an eavesdropper with arbitrary number of eavesdropping antennas

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United States of America Patent

PATENT NO 11483704
APP PUB NO 20210204117A1
SERIAL NO

17134475

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Abstract

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A method for physical layer secure transmission against an arbitrary number of eavesdropping antennas includes: S1: communication between legitimate transmitter Alice and legitimate receiver Bob is confirmed; S2: Alice randomly generates a key bit bk with MS bits, maps the key bit bk into a key symbol K, and performs an XOR on the key bit bk and to-be-transmitted confidential information b to obtain an encrypted bits bs; S3: Bob transmits a pilot sequence to Alice, and Alice calculates a candidate precoding space W and transmits modulated symbol streams s=(s1, . . , sN) by using precoding W(e); S4: 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; S5: Bob performs an XOR on observed key bits and the demodulated ciphertext bits to obtain the confidential information.

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Patent Owner(s)

  • UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA; SCIENCE & TECHNOLOGY DEPARTMENT OF SICHUAN PROVINCE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Liang Chengdu, CN 857 8069
Qin, Kaiyu Chengdu, CN 1 0
Song, Huanhuan Chengdu, CN 4 5
Tang, Jie Chengdu, CN 217 1298
Wen, Hong Chengdu, CN 31 66
Xu, Xinchen Chengdu, CN 1 0

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