基于并行随机相位旋转的物理层安全算法

摘要

In view of the security issues of signal in the LTE system, a new encryption algorithm is proposed to study parallel symbolic encryption. The algorithm introduced key matrix E that based on the LTE system model to achieve encryption to ensure the physical layer security through the matrix and the constellation symbols vector parallel multiplying. Theoretical analysis and simulation results show that using the security algorithm in LTE system, ensure signal security while almost has no effect on the symbol error rate, the PAPR, bandwidth and other performance.%针对信号在移动通信长期演进LTE (Long Term Evolution)系统中传输的安全问题,提出了一种物理层并行符号加密算法.该算法在LTE系统模型的基础上引入密钥矩阵E,通过将该矩阵与星座映射后的符号向量进行并行相乘实现加密,确保物理层安全.理论分析和仿真结果表明:在LTE系统中使用该安全算法,在有效保证信号安全性的同时对系统误符号率、峰均比、带宽等性能几乎无影响.