NDLI: Encrypted subblock design aided OFDM with all index modulation

Content Provider	IET Digital Library
Author	Lu, Xinjin Shi, Yuxin Li, Wei Lei, Jing
Abstract	In recent years, orthogonal frequency division multiplexing with index modulation (OFDM-IM) has been proposed due to its extra diversity gain. Specially, OFDM with all index modulation (OFDM-AIM) was proposed, which removed symbol bits and enhanced the diversity order compared to typical OFDM. However, the security issue of OFDM-AIM has not been given full attention. This paper proposes an encrypted subblock design aided OFDM with all index modulation (ESD-OFDMAIM) scheme to enhance physical layer security. Firstly, an encryption process of subblock design was put forward, which creates a random look-up table and thus the mapping rule of ESD-OFDM-AIM between information bits and subblock realisations becomes random and time varying. Moreover, the scrambling and rotation encryption based on chaotic sequences from channel state information is utilised to prevent the eavesdropper from stealing the information via wireless channel. For eavesdroppers, parameters of ESD-OFDM-AIM such as spectral efficiency (SE), constellation points and the length of look-up table are concealed by the encryption. Finally, analyses of attack models and the information entropy of constellations are also provided to measure the security of ESD-OFDM-AIM. Simulation results show that ESD-OFDM-AIM can effectively improve the system security without the affecting bit error rate performance.
Starting Page	2924
Ending Page	2930
Page Count	7
ISSN	17518628
Volume Number	14
e-ISSN	17518636
Issue Number	Issue 17, Oct (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/14/17
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2019.0678
Journal	IET Communications
Publisher Date	2020-07-30
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bit Error Rate Performance Channel Estimation Channel State Information Chaotic Sequences Communication Channel Equalisation And Identification Constellation Points Cryptography Data Security Diversity Gain Diversity Order Diversity Reception Encrypted Subblock Design Aided OFDM Encryption Process Error Statistics ESD-OFDM-AIM Index Modulation Information Bits Information Entropy Modulation And Coding Method OFDM Modulation OFDM-IM Orthogonal Frequency Division Multiplexing System Physical Layer Security Radio Link And Equipment Random Look-up Table Rotation Encryption Spectral Efficiency Statistics Subblock Realisations Symbol Bits Table Lookup Telecommunication Security Wireless Channel
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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