Shang Pingping, Yu Weicheng, Zhang Kai, Jiang Xue-Qin, Kim Sooyoung
Division of Electronic Engineering, IT Convergence Research Center, Chonbuk National University, Jeonju 54896, Korea.
Shanghai Aerospace Electronic Technology Institute, Shanghai 201109, China.
Entropy (Basel). 2019 Jun 26;21(7):626. doi: 10.3390/e21070626.
In this paper, we present a new secrecy-enhancing scheme for the spatial modulation (SM) system, by considering imperfect channel state information (CSI). In the proposed scheme, two antennas are activated at the same time. One of the activated antennas transmits information symbols along with artificial noise (AN) optimized under the imperfect CSI condition. On the other hand, the other activated antenna transmits another AN sequence. Because the AN are generated by exploiting the imperfect CSI of the legitimate channel, they can only be canceled at the legitimate receiver, while the passive eavesdropper will suffer from interference. We derive the secrecy rate of the proposed scheme in order to estimate the performance. The numerical results demonstrated in this paper verify that the proposed scheme can achieve a better secrecy rate compared to the conventional scheme at the same effective data rate.
在本文中，我们通过考虑不完美的信道状态信息（CSI），提出了一种用于空间调制（SM）系统的新型保密增强方案。在所提出的方案中，同时激活两根天线。其中一根激活天线传输信息符号以及在不完美CSI条件下优化的人工噪声（AN）。另一方面，另一根激活天线传输另一个AN序列。由于AN是通过利用合法信道的不完美CSI生成的，它们只能在合法接收器处被消除，而被动窃听者将受到干扰。我们推导了所提出方案的保密率以评估其性能。本文给出的数值结果验证了与传统方案相比，所提出的方案在相同有效数据速率下能够实现更好的保密率。
