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학술지 Information Leakage in Bi-directional IFD Communication System with Simultaneously Transmitted Jamming Sequence
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저자
주형식, 곽동혁, 김태중
발행일
202002
출처
ETRI Journal, v.42 no.1, pp.138-149
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.2018-0688
협약과제
18ZF1200, Overhead 없이 도감청을 원천 차단하는 Simultaneously-Transmitted Jamming 기술, 주형식
초록
In this paper, we describe a simultaneously transmitted jamming (ST-jamming) for bi-directional in-band full-duplex (IFD) system to improve information security at the physical layer. By exploiting ST-jamming, each legitimate user transmits data samples and jamming samples together in one orthogonal frequency division multiplexing symbol according to given traffic asymmetry. Regardless of the traffic difference in both directions in IFD communication, eavesdropping of confidential information is prevented in both directions simultaneously without the loss of data rate. We first propose an encoding scheme and the corresponding decoding scheme for ST-jamming to be used by the legitimate users. In addition, we study a transceiver structure of the legitimate users including a baseband modem uniquely designed for the use of ST-jamming. The leakage of confidential information at an eavesdropper is then quantified by studying the mutual information between the confidential transmit signals and the received signals of the eavesdropper. Simulation results show that the proposed ST-jamming significantly reduces the leakage of legitimate information at the eavesdropper.
키워드
in-band full-duplex, jamming, mutual information, physical layer security, traffic asymmetry
KSP 제안 키워드
An encoding, Bi-directional, Communication system, Data samples, Full-Duplex(FuDu), In-band full duplex, Information Leakage, Orthogonal frequency division Multiplexing(OFDM), Physical layer Security(Physec), baseband modem, confidential information
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