Testbed for Cooperative Jamming Cancellation in Physical Layer Security
Testbed for Cooperative Jamming Cancellation in Physical Layer Security
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DOI：
10.1109/lwc.2019.2950303
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发表时间：
2020-02
影响因子：
6.3
通讯作者：
Wenbo Guo;Hongzhi Zhao;Youxi Tang
中科院分区：
文献类型：
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作者：
Wenbo Guo;Hongzhi Zhao;Youxi Tang
协同干扰（CJ）可以有效地提高无线通信系统物理层的安全性，但这种提高的前提是授权接收端有效地消除CJ。本文针对点对点通信系统，提出了一种CJ消除结构，并设计实现了一个实验平台，验证了其可行性。实验结果表明，在视距（LOS）传播条件下，所提出的CJ消除结构可以提供约51 dB的CJ消除能力，而由于时频同步和信道估计的不完善，本底噪声提高了5 dB。此外，该系统的保密容量达到7.3bps/Hz，与完全CJ抵消相比，它造成约0.8bps/Hz的降级。
Cooperative jamming (CJ) can effectively improve the security of wireless communication system in the physical layer, but such improvement is conditional on effective CJ cancellation at the authorized receiver. In this letter, by considering the point-to-point communication system, a CJ cancellation architecture is provided, and a testbed is designed and implemented to verify its feasibility. In a lab environment under line-of-sight (LOS) propagation, experimental results demonstrate that the proposed CJ cancellation architecture can provide about 51 dB CJ cancellation capability, while the noise floor is raised by 5 dB because of the imperfect time-frequency synchronization and the imperfect channel estimation. Besides, the system achieves 7.3 bps/Hz on secrecy capacity, as compared to perfect CJ cancellation, it causes about 0.8 bps/Hz degradation.