In this letter, legitimate surveillance of a suspicious multichannel decode-and-forward (DF) relay network is investigated, where the monitor eavesdrops, jams or assists the suspicious communication on each subchannel. The problem of mode selection and transmit power allocation of the monitor for maximizing the eavesdropping rate is first transformed to a more tractable form, and then an optimal algorithm and a suboptimal algorithm are proposed. Simulation results confirm the superiority of the proposed algorithms compared to benchmark algorithms, and show that the suboptimal algorithm is low-complex and achieves the performance very closed to the high-complex optimal algorithm.

中文翻译：

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通过监控模式选择对可疑多通道 DF 中继网络进行合法监控


在这封信中，调查了对可疑多通道解码转发（DF）中继网络的合法监视，其中监视器窃听、干扰或协助每个子通道上的可疑通信。首先将监听器最大化窃听率的模式选择和发射功率分配问题转化为更容易处理的形式，然后提出最优算法和次优算法。仿真结果证实了所提出的算法与基准算法相比的优越性，并表明次优算法的复杂度较低，并且达到了非常接近高复杂度最优算法的性能。