Performance Analysis of Cooperative Communication System

Abstract

The traditional relay selection scheme only considers the channel state information (CSI) of legitimate users, and does not consider the power allocation between the source node and relay node. However, in the actual transmission system, there will be potential eavesdropper, and the traditional relay selection scheme will greatly reduce the security of the system. In this letter, we evaluate the secrecy outage probability (SOP) of relay selection scheme with a decode-and-forward (DF) protocol over independent and non-identically distributed Rayleigh fading. With the CSI of eavesdropper and the power allocation of source node and relay nodes are considered, the secrecy performance of cooperative communication system can be improved effectively.