%0 Journal Article %A CHENG Ming-zhi %A LIU Zhe %A ZHANG Qiao-yu %T A Physical Layer Secure Communication Mechanism Based on Multidimensional Constellation %D 2018 %R 10.13190/j.jbupt.2018-030 %J Journal of Beijing University of Posts and Telecommunications %P 9-15 %V 41 %N 4 %X An orthogonal frequency division multiplexing (OFDM) multi-carrier physical layer secure communication mechanism based on multi-dimensional constellation was presented, which can effectively prevent the modulation information of wireless communication from being eavesdropped, therefore, the security communication is guaranteed. Based on multi-dimensional constellation, the system symbol error rate performance and spectrum utilization are derived and simulated. Simulations show that the multi-carrier polarization state-amplitude-phase modulation scheme can effectively prevent the eavesdropper from obtaining the modulation information, and its symbol error rate and spectral efficiency are significantly better than the traditional OFDM-QAM modulation. %U https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2018-030