Artificial Noise Based Security Algorithm for Multi-User MIMO System

• 作者: Jian-hua Peng Jiang Ji Kai-zhi Huang
• 来源期刊: 通讯与网络(英文)
• 学科: 工学
• 关键词: MULTI-USER MIMO System JOINT CHANNEL State MATRIX SECRECY Capacity Artificial Noise PHYSICAL Layer Security
• 年，卷（期）: txywlyw_2013,（3）
• 页码范围: 194-199
• 页数: 6页
• 分类号: TN91

摘要

The existing physical layer security algorithm, which is based on artificial noise, could affect legitimate receivers negatively when the number of users is no less than sending antennas in multi-user MIMO system. In order to improve security of multi-user MIMO system under this scenario, we propose a new multi-user MIMO system physical layer security algorithm based on joint channel state matrix. Firstly, multiple users are processed together, thus a multi-user joint channel state matrix is established. After achieving Singular Value Decomposition (SVD) of the joint channel state matrix, the minimum singular value is obtained, which can be utilized for precoding to eliminate the interference of artificial noise to legitimate receivers. Further, we also present an approach to optimize the power allocation. Simulation results show that the proposed algorithm can increase secrecy capacity by 0.1 bit/s/HZ averagely.