2014 IEEE Global High Tech Congress on Electronics (GHTCE 2014)

128 / 1971-01-01 00:00:00

Distributed Beamforming To Secure Filter-and-forward Cooperative Relay System

Physical layer security,beamforming,secrecy rate,filter-and-forward,cooperative relay

Due to the broadcast nature of wireless media, distributed networks usually suffer from serious security challenges, such as wiretap, jamming and so on. Physical layer security is an emerging technique to protect the wireless communication, which is regarded as complement to cryptographic communication. In this paper, with incomplete channel state information (CSI) not involving in eavesdropping channel information, artificial noise is introduced to reduce the information leakage. Moreover, different with the conventional relaying approach, i.e., the amplify-and-forward (AF) scheme, in which the signal received at the relay is simply amplified and retransmitted, distributed beamforming with artificial noise for physical layer security of two-way relay networks based on filter-and-forward (FF) is proposed to improve the performance. The simulation and comparison of secrecy capacity under different length of the FIR filter and different error are also given.