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Amplify‐and‐forward‐based cooperative jamming strategy with power allocation for secure communication
Author(s) -
Li An,
Xu Yizhu,
Wang Yuhao,
Sun Lihua
Publication year - 2014
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.2738
Subject(s) - jamming , computer science , secrecy , relay , computer network , interference (communication) , power (physics) , transmission (telecommunications) , transmitter power output , signal (programming language) , telecommunications , secure transmission , near far problem , computer security , wireless , transmitter , channel (broadcasting) , physics , quantum mechanics , thermodynamics , programming language
Summary This paper deals with the use of jamming transmission for secure amplify‐and‐forward‐based relay networks with total power constraints. An approach that the source and the relay use some of their available power to transmit jamming signals in order to create interference at the eavesdropper is investigated. Assume that the relay and destination have an a priori knowledge of the jamming signals. A power allocation policy that defines how the available power is distributed between the message signal and that of the jamming signal is presented. The results show that the proposed approach can increase the secrecy level and that a positive secrecy rate can be achieved even when the eavesdropper may be near the source. Copyright © 2014 John Wiley & Sons, Ltd.