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Title: | Physical-layer security for cooperative networks with jamming and beamforming | Authors: | Pham Nhat Nam | Keywords: | Physical-layer security;Cooperative networks;Jamming and beamforming | Issue Date: | 2018 | Publisher: | Vietnamese-German University | Abstract: | Security for network is critical and essential aspect in modem life. Physical-layer security is a newly developed area of network security in which security methods and schemes are used to guarantee that the eavesdroppers cannot get any secured exchanged information without encryption. Therefore, the data processing time is reduced and the data transmission rate is increased. However, the techniques used in physical-layer security have a constraint in which the source-destination channel has to be better than the source-eavesdropper channel. In practice, issues such as obstacles or large distance bet's een the sourer and the destination affect the quality of the source-destination channel. Therefore, the utilizations of relay communication combining with a security technique helps the source-destination channel get over these troubles and improve the capacity. To the best of my knowledge, a single method may not guarantee a strictly secured communication, especially when the malicious agents gain higher and higher capability these days. In order to determine which combination of methods gives the best performance, studying and simulating the relationship between secrecy rate and other variables such as transmit power levels, eavesdropper's position. etc. are done several times and the average results are recorded. Nevertheless, some simulation results are recorded with the best result, not average one, because the results arc not stable for some unknown causes. Among all the techniques analyzed in this thesis, beamforming is the best supportive technique for jamming signal since it gives the highest result in all the simulations. Optimal Relay Selection (ORS), Energy Harvesting (EH), etc_ are the techniques that will be analyzed along with some beam forming technique applications, |
URI(1): | http://epub.vgu.edu.vn/handle/dlibvgu/597 | Rights: | Attribution-NonCommercial 4.0 International |
Appears in Collections: | Electrical Engineering and Information Technology (EEIT) |
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