Secure OFDM transmission in wireless networks with untrusted relays
| Autor: | Guobing Li, Qiuli Dong |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
business.industry
Computer science Orthogonal frequency-division multiplexing Wireless network ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS 05 social sciences Physical layer 050801 communication & media studies 020206 networking & telecommunications Data_CODINGANDINFORMATIONTHEORY 02 engineering and technology 0508 media and communications Transmission (telecommunications) Computer Science::Networking and Internet Architecture 0202 electrical engineering electronic engineering information engineering Wireless business Secure transmission Wireless sensor network Computer Science::Information Theory Computer Science::Cryptography and Security Computer network |
| Zdroj: | WCSP |
| DOI: | 10.1109/wcsp.2017.8171185 |
| Popis: | Physical layer security is becoming a promising technology to face the security challenges of diversified and rapidly-growing wireless applications. In this paper, we propose a three-hop secure Orthogonal Frequency Division Multiplexing (OFDM) transmission protocol for the wireless networks with untrusted relays. In the proposed protocol, instead of exploiting the degree of freedom over spatial domain in multi-antenna systems, the transmission is secured through single-antenna small wireless devices by the use of multiple sub-carriers in frequency. With the objective to maximize the security rate, we formulate the optimal problem for sub-carrier power distribution and time-domain artificial noise design. Since this problem is non-convex, we further approximate and reformulate it into a train of convex problems through relaxation. By solving the relaxed problem, we design an iterative power distribution and time-domain artificial noise scheme for the proposed three-hop protocol. Simulation results demonstrate that the proposed protocol is robust to untrusted relays and can achieves higher secrecy rate compared with the existing two-hop OFDM secure transmission protocols. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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