Supported by the National Natural Science Foundation of China(No.61325018,61272379);the National High Technology Research and Development Program of China(No.2006AA04Z246);the Ministry of Education Science and Technology Innovation Engineering Major Cultivation Project of China(No.107053)
An amplify-and-forward(AF) dual-hop relay is proposed for secure communication within Wyner s wiretap channel.Based on an information-theoretic formulation,the average secrecy rate is characterized when two legitimate...