论文标题
SISO通信中的物理层安全性使用频率域的时间逆转ofdm预编码和人造噪声注入
Physical Layer Security in a SISO Communication using Frequency-Domain Time-Reversal OFDM Precoding and Artificial Noise Injection
论文作者
论文摘要
提出了频域（FD）时间逆转（TR）预编码器，使用正交频率分割多路复用（OFDM）和人工噪声（AN）信号投射在单输入单输出（SISO）系统中执行物理层安全性（PLS）。 AN信号不会破坏数据传输到合法的接收器，而是会降低窃听器的解码性能。当发射器知道合法链接的瞬时频道状态信息（CSI），由于时代双工（TDD）系统的频道互惠，但不知道潜在的Eavesdropper的瞬时CSI，该方案确保了与合法用户进行沟通的保密性。根据爱丽丝和鲍勃之间的握手程序，在快速褪色（FF）环境中考虑了窃听器的三个最佳解码结构。为了最大化通信的SR，a an的闭合形式的近似值被得出。此外，当夏娃的信噪比（SNR）是无限的时，确定合法接收器的所需条件以确定给定的SR。此外，提出了水填充策略，以进一步增强该计划的保密性。提出了仿真结果，以证明所提出的安全系统的安全性能。
A frequency domain (FD) time-reversal (TR) precoder is proposed to perform physical layer security (PLS) in single-input single-output (SISO) systems using orthogonal frequency-division multiplexing (OFDM) and artificial noise (AN) signal injection. The AN signal does not corrupt the data transmission to the legitimate receiver but degrades the decoding performance of the eavesdropper. This scheme guarantees the secrecy of a communication towards a legitimate user when the transmitter knows the instantaneous channel state information (CSI) of the legitimate link thanks to the channel reciprocity in time division duplex (TDD) systems, but does not know the instantaneous CSI of a potential eavesdropper. Three optimal decoding structures at the eavesdropper are considered in a fast fading (FF) environment depending on the handshake procedure between Alice and Bob. Closed-form approximations of the AN energy to inject in order to maximize the SR of the communication are derived. In addition, the required conditions at the legitimate receiver's end to guarantee a given SR are determined when Eve's signal-to-noise ratio (SNR) is infinite. Furthermore, a waterfilling power allocation strategy is presented to further enhance the secrecy of the scheme. Simulation results are presented to demonstrate the security performance of the proposed secure system.
