Visible Light Communication System Employing Space Time Coded Relay Nodes and Imaging Receivers

Shimaponda-Nawa, Mulundumina; Achari, Shamin; Jayakody, Dushantha Nalin K.; Cheng, Ling

doi:10.23919/saiee.2020.9099493

Cited by 4 publications

(4 citation statements)

References 33 publications

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“…In order to solve this problem, the multiple-input multiple-output (MIMO) communication system using a space resource has become an effective way. Because the performance gain of MIMO communication system can increase linearly with the increase of the number of antennas, the MIMO communication has not only been widely used in the radio frequency (RF) field but also aroused the interest of researchers which are interested in how to apply this scheme to visible light communication (VLC) [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…At present, the MIMO communication system which is based on space time code (STC) [4] technology has been widely used in 4G and 5G communication systems. At the same time, in order to improve the reliability of the communication system, researchers further transform space time block coding (STBC) [2] in STC into orthogonal STBC or combine it with spatial multiplexing (SM) [1,3]. Moreover, in recent years, the orthogonal time-frequency space (OTFS) modulation has been proposed to be applied in the MIMO communication system [5], which has advantages of overcoming Doppler interference and low computational complexity [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Secure Mimo Communication System with Frequency Hopping Aided OFDM-DCSK Modulation

et al. 2022

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In this paper, a multiple-input multiple-output (MIMO) communication system with frequency hopping (FH) aided orthogonal frequency division multiplexing differential chaotic shift keying (OFDM-DCSK) modulation is proposed. Our objective is to improve the security of MIMO communication system which is encoded by space time block coding (STBC). In order to combat the eavesdropping or malicious attacks due to the broadcast characteristics of wireless communication system, we propose to use DCSK and FH modules to encrypt the information, and hide the user data in the chaotic sequences, where the initial value of chaotic sequences and the method of generating FH module are only shared among legitimate users. Moreover, we derive the bit error rate (BER) and the secrecy capacity of the scheme in additive white Gaussian noise (AWGN) channel and Rayleigh fading channel. Simulation results show that the proposed scheme can effectively improve the security of MIMO communication system, which can be seen from the BER of eavesdroppers and legitimate users, and the secrecy capacity of the proposed scheme and the benchmark schemes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Secure Mimo Communication System with Frequency Hopping Aided OFDM-DCSK Modulation

et al. 2022

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“…In [26] and [27], the bit error rate (BER) performance of 120 an HPV system with multiple-input multiple-output (MIMO) 121 configurations at the VLC sections, is presented with prac-122 tical indoor considerations. It was established that channel 123 effects from both PLC and VLC have an influence on the 124 BER performance of the HPV system.…”

mentioning

confidence: 99%

“…The work in [42] demonstrated sequently resulting in an energy efficient PLC system. Others Time-diversity schemes have also been applied in different communication technologies for performance reliability enhancement [26], [38]. In time-diversity schemes, information bits or symbols are repeatedly transmitted such that the receiver has multiple copies of the transmitted signal, from which different decoding schemes such as maximum ratio combining (MRC), majority rule scheme or any comparison based technique, can be applied.…”

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confidence: 99%

Impulse Noise Mitigation by Time-Diversity Hermitian Symmetry in Hybrid Powerline and Visible Light Communication Systems

Shimaponda-Nawa

Kolade

et al. 2022

IEEE Access

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Hybrid powerline and visible light communication (HPV) systems offer a cost-effective method of providing high-speed communication in indoor and outdoor environments, for the realisation of internet of things (IoT). However, in the HPV system the powerline communication (PLC) channel is inherently susceptible to impulse noise (IN) due to electrical appliances randomly connected to the powerline. This adversely affects the HPV system's bit error rate (BER) performance. In this paper, a time-diversity Hermitian symmetry (TDHS) scheme, which mitigates the effects of IN in a PLC channel is proposed. The scheme employs the Hermitian symmetry structure to recover information symbols likely to have been affected by the IN. By using the TDHS scheme, the probability of the effect of IN on data symbols through a PLC channel, is drastically reduced by 75%. By simulations, the effectiveness of the TDHS scheme is demonstrated via the enhanced BER performance of the system. The TDHS scheme is then implemented over a permutation coded HPV system using the amplify-and-forward protocol at the PLC-VLC integration unit and the Hungarian-Murty (HM) soft-decision decoder at the destination. The combination of the TDHS scheme and the HM decoder in a coded system provides further BER performance enhancement, exceeding 10 dB gain in signal-to-noise ratio (SNR) at a BER of 10 −4 . INDEX TERMSHermitian symmetry, hybrid powerline and visible light communication, impulse noise, time-diversity. I. INTRODUCTION 17 Smart homes, smart cities, smart mines, wearables and con-18 nected cars are just but a few areas where the internet of 19 things (IoT) has developed and will continue to grow [1], [2], 20 [3]. This growth demands increasingly wide coverage areas, 21 high capacities and data rates to maintain reliable and ubiq-22 uitous connectivity of several smart devices and machines, 23 157 that simultaneously exploiting the advantages of the clip-158 ping and blanking schemes by combining them yields better 159 results, compared to using the two schemes independently. 160 While, in [43], pre-processing the signal at the transmitter 161 was proposed and shown to enhance the performance of 162 the blanking/clipping-based techniques for IN mitigation in 163 powerline channels. In [45], simple iterative impulsive noise 164 suppression algorithms that exploit the noise structure in 165 the time and frequency domain, were shown to improve the 166 performance of the OFDM receiver. Further, in [44], the 167 performance of the PLC system was enhanced by preceding 168 the iterative algorithms discussed in [45] with a clipping and 169 nulling technique. Noting the inherent issue of high peak-170 to-average power ratio (PAPR) of the transmitted signal in 171 OFDM-based systems, various studies have proposed and 172 used some variations of the OFDM techniques in PLC. For 173 example, vector OFDM (VOFDM) has been reported to 174 exhibit lower PAPR than conventional OFDM [46], [47], con-550 only slightly compared to the description in Section III-B1.551The di...

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Soft-Decision Decoding of Permutation-Based Optical Codes for a Multiple Access System

et al. 2021

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Visible Light Communication System Employing Space Time Coded Relay Nodes and Imaging Receivers

Cited by 4 publications

References 33 publications

Secure Mimo Communication System with Frequency Hopping Aided OFDM-DCSK Modulation

Secure Mimo Communication System with Frequency Hopping Aided OFDM-DCSK Modulation

Impulse Noise Mitigation by Time-Diversity Hermitian Symmetry in Hybrid Powerline and Visible Light Communication Systems

Soft-Decision Decoding of Permutation-Based Optical Codes for a Multiple Access System

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