摘要： 在物理层安全通信系统中,现有混合重传(HARQ)技术在合法用户出错时会重传整个数据,从而使窃听用户获得大量有用信息。针对上述问题,引入基于可靠度混合重传协议(RB-HARQ),提出一种安全的通信技术。RB-HARQ可以仅重传合法用户最可能出错的比特,使泄露给窃听用户的有用重传信息减少,从而实现安全可靠通信。仿真结果表明,与传统HARQ协议相比,该协议能提高通信系统的物理层安全性能。

关键词: 物理层, 安全容量, 可靠度, 安全性, 窃听用户

Abstract: In physical layer secure communication system,the existing retransmission technology retransmits the whole wrong message when the legitimate user is in error,which may lead to the eavesdropper receives a lot of useful information.Aiming at solving the above problems,the Reliability-based Hybrid Automatic Repeat Request (RB-HARQ) protocol is introduced in,and a secure communication technology is proposed.RB-HARQ protocol can just retransmit the unreliable bits required by the legitimate user and minimizing the information leak to eavesdropper,thus secure and reliable communication can be achieved.Simulation results show that,compared with the traditional HARQ protocol,RB-HARQ protocol can enhance the physical layer security performance of the communication system.

Key words: physical layer, safe capacity, reliability, security, hacking user

中图分类号: 

• TN918.91