非协调辅助者实现协同干扰的物理层安全
Physical Layer Security with Uncoordinated Helpers Implementing Cooperative Jamming
摘要：
无线通信网络被认为是由一个源（爱丽丝），一个目的地（鲍勃）和一个窃听者（夏娃），每个配备有一个单一的天线。通信由多个助手辅助，每个助手配备有两个天线，其实现合作干扰，即，传送噪音来迷惑夏娃导出了使保密率最大化的最优干扰噪声结构。还考虑了调零噪声场景，其中每个助手发送在Bob处调零的噪声。每个助手只需要知道自己与Bob的链接，就可以在本地确定噪声。对于最优结构噪声，需要所有链路的全局信息。虽然分析表明，在每个助手两个天线的情况下，调零解决方案在可实现的保密率方面是次优的，但仿真表明，性能差异相当小，廉价且易于实现的调零方案接近最优。
英文摘要：
A wireless communication network is considered, consisting of a source (Alice), a destination (Bob) and an eavesdropper (Eve), each equipped with a single antenna. The communication is assisted by multiple helpers, each equipped with two antennas, which implement cooperative jamming, i.e., transmitting noise to confound Eve. The optimal structure of the jamming noise that maximizes the secrecy rate is derived. A nulling noise scenario is also considered, in which each helper transmits noise that nulls out at Bob. Each helper only requires knowledge of its own link to Bob to determine the noise locally. For the optimally structured noise, global information of all the links is required. Although analysis shows that under the two-antenna per helper scenario the nulling solution is sub-optimal in terms of the achievable secrecy rate, simulations show that the performance difference is rather small, with the inexpensive and easy to implement nulling scheme performing near optimal.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
