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This work considers a multicast network in the presence of an eavesdropper. We investigate a cooperative multicast scheme which allows the users to function as relays. The secure outage behavior of this scheme is studied and the analytical expression of secure outage probability is derived. Numerical results show that the proposed cooperative multicast scheme outperforms the direct multicast without...
We find that traditional authentication ways donpsilat act well in MANETs for the features of dynamic topology and non-existence of central facilities in mobile ad hoc networks. This paper presents a distributed trust proving language, which is based on role trust. The solution of constructing credential authentication infrastructure and the problem how to perform automated trust negotiation are also...
This paper analyzes the structure and modem scheme of chirp-BOK system. In additive white Gaussian noise channel, an approach of studying the performance of chirp-BOK is presented and the BER-SNR result is evidently improved compared with traditional BOK. Furthermore, the BER of multi-user chirp-BOK system is discussed.
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