期刊
IEEE SIGNAL PROCESSING LETTERS
卷 24, 期 6, 页码 917-921出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSP.2017.2696305
关键词
Beamformer design; decode-and-forward (DF) relay; legitimate surveillance; power allocation; proactive eaves-dropping
资金
- National Natural Science Foundation of China [61671406]
- Zhejiang Provincial Natural Science Foundation of China [LR15F010001]
- National Science and Technology Major Project of China [2017ZX03001002-003]
- JSPS KAKENHI [17K06435]
- Grants-in-Aid for Scientific Research [17K06435] Funding Source: KAKEN
This letter investigates the performance of a legitimate surveillance system, where a legitimate monitor aims to eavesdrop on a dubious decode-and-forward relaying communication link. In order to maximize the effective eavesdropping rate, two strategies are proposed, where the legitimate monitor adaptively acts as an eavesdropper, a jammer, or a helper. In addition, the corresponding optimal jamming beamformer and jamming power are presented. Numerical results demonstrate that the proposed strategies attain better performance compared with intuitive benchmark schemes. Moreover, it is revealed that the position of the legitimate monitor plays an important role on the eavesdropping performance for the two strategies.
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