Performance analysis of non-line of sight visible light communication systems

Dixit, Vipul; Kumar, Atul

doi:10.1016/j.optcom.2019.125008

Cited by 25 publications

(16 citation statements)

References 19 publications

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“…In [32]- [34], additionally, the effect of different modulation techniques on data transmission, dimming, and bandwidth was investigated. Besides [35], in which a new approach was utilized to study the BER performance of the VLC system for LOS and Non-LOS links. Despite all previous investigations, there are no extensive results and discussions about determining the optimal number of OAs that could be deployed in a typical room model to deliver better illumination and communication performances.…”

Section: Related Workmentioning

confidence: 99%

“…The room model size is typically set as 5 × 5 × 3𝑚, and it represents the room's length, width, and height, respectively. The transmitted signals will reach the receiver end by using a direct link which is termed the line of sight (LOS) link or reflected link and its termed as non-line of sight (Non-LOS) link [35]. We have considered the LOS link in the evaluation of this paper.…”

Section: System Modelmentioning

confidence: 99%

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Design and Analysis of Different Optical Attocells Deployment Models for Indoor Visible Light Communication System

Gismalla

Abdullah

Ahmed

et al. 2021

IJIE

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Visible light communication (VLC) is a promising candidate that is expected to revolutionize indoor environment communications performance and fulfill fifth generation and beyond (5GB) technologies requirements. It offers high and free bandwidth, electromagnetic interference immunity, low-cost front end and low power consumption. Also, VLC has dual functions that could be utilized in both illumination and communication concurrently. The number of optical attocells (OAs) and their deployment in the room represent the main issue that should be taken into consideration in designing an optimal VLC system. In this paper, we have introduced a new model of five OAs in the typical room. In addition to an investigation of various optical attocells (OAs) deployment models, in which a multi-variable evaluation was performed in terms of received power, illumination, SNR and RMS delay spread in order to determine the optimal OAs model. Also, various modulation schemes performances were investigated which included NRZ-OOK, BPSK, and QPSK in order to improve the BER performance. Results indicated that BPSK modulation had superior BER performance when compared with all OAs models. Further, a comprehensive results analysis and comparison of all proposed models was conducted over various parameters, in which our new proposed OAs model achieved an optimal performance in comparison with the other models.

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Section: Related Workmentioning

confidence: 99%

Section: System Modelmentioning

confidence: 99%

Design and Analysis of Different Optical Attocells Deployment Models for Indoor Visible Light Communication System

Gismalla

Abdullah

Ahmed

et al. 2021

IJIE

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“…where 1 h is the height of receivers above the ground. In this analysis only LOS path is considered, as the power received through Non-LOS path is much lower than that of LOS path [19,[24][25]. The direct current (DC) channel gain of LOS path between…”

Section: System Modelmentioning

confidence: 99%

An Exact Error Analysis of Multi-User RC/MRC Based MIMO-NOMA-VLC System With Imperfect SIC

Dixit

Kumar²

2021

IEEE Access

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Visible Light Communication (VLC) has appeared as a breakthrough technology for beyond 5G networks by delivering a broad license free spectrum. In this paper, multiple input multiple output (MIMO) technique is implemented with non-orthogonal multiple access (NOMA-VLC) system in order to develop a robust error-free high rate network for a multi-user scenario. In particular, a generalized multi-user MIMO-NOMA-VLC system with M N  line-of-sight (LOS) links per user is proposed which adopts on-off keying (OOK) modulation for data transmission. A novel closed form expression of probability of error for the proposed system is derived considering a practical scenario of imperfect successive interference cancellation (SIC). This paper also presents the detailed analysis of a three user 2 2  MIMO-NOMA-VLC system and an exact closed form expression of probability of error of this system is derived. The three user 2 2  MIMO-NOMA-VLC system completely outperforms the single input single output (SISO) NOMA-VLC system with same set of parameters. The error performance of the proposed system enhances as the number of photo detectors (PDs) at each user increases. A three user 2 2  MIMO-NOMA-VLC system ensures the best performance at the power allocation co-efficient of 0.3 . The error performance of the proposed system is investigated for the parameters of interest, i.e., distance between the transmitting LEDs and distance between the receiving PDs at each user terminal. The derived probability of error expressions are verified with the simulation results.INDEX TERMS Visible light communication (VLC), Non-orthogonal multiple access (NOMA), Multiple input multiple output (MIMO), Bit-error-rate (BER).

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“…Only LOS link is considered in this analysis as the received power is higher compared to the non-line of sight (NLOS) link. 18,19 The channel gain of LOS link between nth, LED, n ∈ {1, 2} and the mth PD, m ∈ {1, 2, .., M} of kth user, 1 ≤ k ≤ K, is given by References 1,20…”

Section: System Modelmentioning

confidence: 99%

BER performance of MIMO based NOMA‐VLC system with imperfect SIC

Dixit

Kumar

2021

Trans Emerging Tel Tech

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In this article, multiple‐input multiple‐output (MIMO) technique is employed with non‐orthogonal multiple access‐visible light communication (NOMA‐VLC) systems, namely MIMO‐NOMA‐VLC, to develop a low error and high data rate network. In particular, a multi‐user downlink MIMO‐NOMA‐VLC system with equal gain combiner (EGC) at the receiver is proposed. The on‐off keying (OOK) and L‐pulse position modulation (L‐PPM) is adopted for performance analysis. The imperfect successive interference cancellation (SIC) scenario is also considered to emphasize the practicability of the system. The closed‐form expressions for bit‐error‐rate (BER) of the proposed MIMO‐NOMA‐VLC system are derived with perfect and imperfect SIC. Specifically, two and three‐user scenarios are considered for detailed analysis. The MIMO‐NOMA‐VLC system with EGC combiner at the receiver completely outperforms the single‐input single‐output (SISO‐NOMA‐VLC) system. The proposed MIMO‐NOMA‐VLC system provides the best error performance at the power allocation co‐efficient assigned to far user of 0.3. Further, the error performance of the proposed MIMO‐NOMA‐VLC system is investigated for the system parameters such as diversity order, modulation order, user count and so forth. The derived analytical results are verified with the Monte‐Carlo simulation results.

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Performance analysis of non-line of sight visible light communication systems

Cited by 25 publications

References 19 publications

Design and Analysis of Different Optical Attocells Deployment Models for Indoor Visible Light Communication System

Design and Analysis of Different Optical Attocells Deployment Models for Indoor Visible Light Communication System

An Exact Error Analysis of Multi-User RC/MRC Based MIMO-NOMA-VLC System With Imperfect SIC

BER performance of MIMO based NOMA‐VLC system with imperfect SIC

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