Physical layer key extraction method based on channel gain compensation and subcarrier correlation

• Main Authors: DING YUAN, ZHANG CHAOFAN, GUO DAWEI, LIU JIAQI, YUE WENPU, FEI HONGMING, LIU HANG
• Format: Patent
• Language: Chinese; English
• Published: 06.09.2019
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION; WIRELESS COMMUNICATIONS NETWORKS

The invention provides a physical layer key extraction method based on channel gain compensation and subcarrier correlation. The method comprises the following steps: firstly, acquiring and detectingchannel state information; secondly, carrying out channel gain compensation through non-reciprocity learning, and enhancing reciprocity of channel state information of two parties; secondly, obtaininga more reliable initial secret key through subcarrier clustering overall quantification; and finally, carrying out consistency negotiation and enhancement processing on the initial key to obtain a final security key. By means of channel gain compensation, subcarrier correlation analysis and the like, safer and more effective data communication is achieved on an original communication system basedon channel state information, and more reliable key bit streams with low bit error rates are provided for wireless encryption communication. 本发明提供了一种基于信道增益补偿及子载波相关性的物理层密钥提取方法。首先，进行信道状态信息采集和探测；然后，通过非互易性学习进行信道增益补偿，增强双方信道状态信息的互易性