期刊
IEEE SIGNAL PROCESSING LETTERS
卷 25, 期 8, 页码 1131-1135出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSP.2018.2843285
关键词
Eavesdropping rate; legitimate surveillance; priority; proactive eavesdropping; proactive intervening
资金
- National Natural Science Foundation of China [61501185, 61531006, 61772233]
- Hebei Province Natural Science Foundation [F2016502062]
- Fundamental Research Funds for the Central Universities [2016MS97]
- Beijing Natural Science Foundation [4164101]
- ARC [DP150104019]
This letter investigates the proactive eavesdropping for multiple suspicious links either through interfering or assisting the links. Considering the power constraint at eavesdropper, our objective is to maximize weighted sum eavesdropping rate of multiple suspicious links via jointly optimizing their intervention strategies (jamming or relaying) and the corresponding transmit power at eavesdropper. The formulated problem is shown to be a mixed-integer nonlinear programming (MINLP) problem, which is NP-hard in general. By identifying the separable structure of the formulated problem, we decouple the complex MINLP problem into two subproblems: 1) a jamming subproblem; and 2) a relaying subproblem. These two subproblems are then solved by further recasting them into a combinational problem and a typical concave optimization problem, respectively. Numerical simulations show that our proposed approach can achieve higher eavesdropping rate than conventional eavesdropping approaches.
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