Secure and private NOMA VLC using OFDM with two-level chaotic encryption

Yang, Yanbing; Chen, Chen; Zhang, Wei; Deng, Xiong; Du, Pengfei; Yang, Helin; Zhong, Wen‐De; Chen, Liangyin

doi:10.1364/oe.26.034031

Cited by 34 publications

(15 citation statements)

References 27 publications

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“…In Ref. [32], Yang et al proposed a NOMA-VLC system with a two-level chaotic encryption scheme. The results showed that this scheme can guarantee the security of legitimate users against eavesdroppers and privacy among all legitimate users.…”

Section: Related Workmentioning

confidence: 99%

Performance analysis of a low-complexity nonorthogonal multiple access scheme in visible light communication downlinks using pulse modulations

Song

Cao

Zhang

2021

Intell. and Converged Netw.

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Although Successive Interference Cancellation (SIC) decoding is widely adopted in Nonorthogonal Multiple Access (NOMA) schemes for the recovery of user data at acceptable complexity, the imperfect SIC would cause Error Propagation (EP), which can severely degrade system performance. In this work, we propose an SIC-free NOMA scheme in pulse modulation based Visible Light Communication (VLC) downlinks, including two types of users with different data rate requirements. Low bit-rate users adopt on-off keying, whereas high bit-rate ones use Multiple Pulse Position Modulation (MPPM). The soft decision decoding scheme is exploited by high bit-rate users to decode MPPM signals, which could fundamentally eliminate the detrimental effect of EP; the scheme is also easier and faster to execute compared with the conventional SIC decoding scheme. Expressions of the symbol error rate and achievable data rate for two types of users are derived. Results of the Monte Carlo simulation are provided to confirm the correctness of theoretical results.

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Section: Related Workmentioning

confidence: 99%

Performance analysis of a low-complexity nonorthogonal multiple access scheme in visible light communication downlinks using pulse modulations

Song

Cao

Zhang

2021

Intell. and Converged Netw.

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“…Chaos is a part of mathematics that reviews the behavior of a dynamic framework that is very sensitive to the initial condition, randomness, and unpredictability. In [4], the authors suggested a private nonorthogonal multiple-access visible-light communication system encryption based on nonlinear dynamical systems. The encryption scheme assures privacy among all legal users against attackers during communication.…”

Section: Introductionmentioning

confidence: 99%

Secure OFDM‐Based NOMA for Machine‐to‐Machine Communication

Rahman

Sultan

Alroobaea

et al. 2021

Wireless Communications and Mobile Computing

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Machine-to-machine communication (M2M) has obtained increasing interest in recent years. However, its enhancement and broadcasting characteristics produced a new security challenge. We have suggested a novel dynamic Quadrature Amplitude Modulation (QAM) scheme for a totally elastic and dynamic mapping of user data by using chaos. This paper analyses physical layer security methods in Orthogonal Frequency Division Multiplexing-based Nonorthogonal Multiple Access (OFDM-NOMA) and introduces a secure data transmission mechanism created by dynamic QAM. The security robustness given by the suggested encryption scheme is assessed, where an overall keyspace of ~ 10 163 is achieved, which is sufficient to provide security against exhaustive attacks. The result of the scheme is verified through MATLAB simulation, where the bit error rate performance of our proposed scheme is compared with an unencrypted OFDM signal, and the performance of our proposed scheme is analyzed for an illegal user. The suggested dynamic mapping fulfills the fundamental obligations of cryptography for data security. Moreover, it enhances the level of security in OFDM-NOMA.

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“…As a result, it is quite challenging to achieve high-speed and large-capacity VLC systems by utilizing low-cost COTS white LEDs. To overcome the bandwidth limitation, many capacityenhancing techniques have been proposed for VLC systems using COTS white LEDs so far, including frequency domain equalization (FDE) schemes for substantial extension of LED modulation bandwidth [11]- [13], spectral-efficient modulation formats such as orthogonal frequency division multiplexing (OFDM) using high-order quadrature amplitude modulation (QAM) constellations [14], [15], and multiple-input multipleoutput (MIMO) transmission [16], [17]. In particular, MIMO is a very natural and efficient way to improve the achievable capacity of an indoor VLC system, since multiple LEDs are commonly mounted in the ceiling of a typical indoor environment so as to obtain sufficient and uniform illumination [18].…”

Section: Introductionmentioning

confidence: 99%

Space Division Multiple Access With Distributed User Grouping for Multi-User MIMO-VLC Systems

Chen

Yang

Deng

et al. 2020

IEEE Open J. Commun. Soc.

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To support multiple users in an indoor multiple-input multiple-output visible light communication (MIMO-VLC) system adopting spatial multiplexing, orthogonal frequency division multiple access (OFDMA) is usually adopted, where the overall modulation bandwidth is shared by all the users. In this paper, by fully exploiting the spatial distributions of light-emitting diode (LED) transmitters in the ceiling and end users around the receiving plane, we propose a space division multiple access (SDMA) technique for indoor spatial multiplexing-based MIMO-VLC systems. When applying SDMA, users within the MIMO-VLC system are divided into different user groups (UGs) based on their spatial locations with respect to different LED transmitters. Specifically, each UG can use the overall modulation bandwidth of the system. For efficient implementation of SDMA, two distributed user grouping (DUG) approaches are proposed, including basic DUG and transmit diversity-enhanced DUG (TD-DUG), and a two-step resource allocation algorithm is further designed. The achievable rates of the MIMO-VLC system employing SDMA with both basic DUG and TD-DUG are derived accordingly. To verify the superiority of SDMA over conventional OFDMA, detailed analytical and simulation results are presented. Moreover, a proof-of-concept experiment is conducted to demonstrate the advantage of SDMA in a practical spatial multiplexing-based MIMO-VLC system. Index Terms-Distributed user grouping (DUG), multiple-input multiple-output (MIMO), space division multiple access (SDMA), visible light communication (VLC).

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Secure and private NOMA VLC using OFDM with two-level chaotic encryption

Cited by 34 publications

References 27 publications

Performance analysis of a low-complexity nonorthogonal multiple access scheme in visible light communication downlinks using pulse modulations

Performance analysis of a low-complexity nonorthogonal multiple access scheme in visible light communication downlinks using pulse modulations

Secure OFDM‐Based NOMA for Machine‐to‐Machine Communication

Space Division Multiple Access With Distributed User Grouping for Multi-User MIMO-VLC Systems

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