Security and Safety
Volume 1, 2022
|Number of page(s)||12|
|Published online||22 June 2022|
Secure transmission technology based on direct modulation with random channel characteristics
School of Cyberspace Security, Southeast University, Nanjing 211189, China
2 State Key Laboratory of Mobile Communications, Southeast University, Nanjing 210096, China
* Corresponding author (email: email@example.com)
Revised: 6 March 2022
Accepted: 26 March 2022
Aiming at the problem of insufficient security in the existing wireless data transmission, a security transmission technology based on direct modulation with random channel characteristics is proposed. The method first estimates channel characteristics using the preamble in the communication frame, and then embeds channel characteristics into the I/Q modulator. After that, the modulated constellation diagram undergoes random hopping of the constellation position compared with the original constellation diagram, thus achieving the effect of secure transmission. Due to the reciprocity of the uplink and downlink channels, channel characteristics estimated by the downlink receiver are almost the same as those estimated by the uplink receiver, and the correct plaintext data can be recovered by performing corresponding demodulation with them. Compared with the existing scheme of quantizing channel characteristics and then encrypting data, the method reduces the performance loss caused by quantization. In addition, its bit error rate is lower than that of the quantization method. In general, it has higher security and convenience.
Key words: Channel reciprocity / Channel state information (CSI) / Physical layer security / Channel characteristics / Constellation diagram
Citation: Yang R and Hu A. Secure transmission technology based on direct modulation with random channel characteristics. Security and Safety 2022; 1: 2022006. https://doi.org/10.1051/sands/2022006
© The Author(s) 2022. Published by EDP Sciences and China Science Publishing & Media Ltd.
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