Physical-layer security enhancement via power allocation between pilot and data jamming
| Autor: | Joonhyuk Kang, Wonju Lee, Seungjae Jung, Sungjun Ahn |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Beamforming
Computer science business.industry Phase (waves) Physical layer 020206 networking & telecommunications 020302 automobile design & engineering Jamming Data_CODINGANDINFORMATIONTHEORY 02 engineering and technology Power (physics) 0203 mechanical engineering 0202 electrical engineering electronic engineering information engineering Electronic engineering Artificial noise Telecommunications business Communication channel Efficient energy use |
| Zdroj: | CCNC |
| Popis: | In this paper, we consider the multiple-input single-output (MISO) wiretap channel with a cooperative jammer (CJ). Motivated by the fact that corrupting pilot signals can effectively degrade the channel estimation at the eavesdropper (Eve), we emphasize that the physical-layer security can be enhanced by introducing jamming signals in pilot phase. Therefore, we propose a cooperative jamming scheme which delivers artificial noise (AN) both in pilot and data phases, unlike the conventional schemes that transmit AN only in data phase. More specifically, we optimize the jamming power allocation between pilot phase and data phase, along with designing the beamforming vector at the CJ. Furthermore, considering the limitation of energy budget at the CJ, the energy efficiency of the proposed scheme is investigated based on the circuit power consumption model. Finally, numerical results verify the performance of the proposed scheme, in terms of secrecy rate and energy efficiency. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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