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Enhanced Optical OFDM: A novel approach for SISO and MIMO Visible Light Communication system in indoor environment

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Abstract

Visible Light Communication is determined to be as a new technology for recent wireless digital communications. This paper makes the description over an innovative VLC system with superior performance and efficiency over previous systems. In this paper, Indoor VLC communication model is being proposed in Single Input Single Output (SISO) and Multiple Input Multiple Output (MIMO) using Enhanced Optical Orthogonal Frequency Division Multiplexing (EO-OFDM). The MIMO VLC system overcomes the limitations of channel capacity caused by the limited LED modulation bandwidth using the parameter of high Signal to Noise Ratio (SNR) of the SISO channel LED lighting requirements. This article enumerates the comparison over the Enhanced Optical OFDM (EO-OFDM), which is being utilized as an enhanced-bandwidth technique, with the conventional Generalized Frequency Division Multiplexing (GFDM), Space Time Block Coded OFDM (STBC-OFDM), Optical OFDM. The proposed system enhances the Bit Error Rate (BER) performance, throughput for all possible channel gains of MIMO over SISO VLC communication compared to other conventional systems. Inspite of maintaining the same data transmission rate as the conventional method, the Bit Error Rate (BER) of the proposed system has been improved by 10–5 at SNR equal to 20 dB. Based on the acquired results, EO-OFDM has provided higher data rates than OFDM on channels with limited frequency bands and makes the reduction over the Peak Average Power Ratio (PAPR). In the proposed EO-OFDM technique, the performance analysis of throughput over SNR has been computed in comparison with O-OFDM, OAK-OFDM, PWM-OFDM with which the throughput of 20 Mbits per second has been achieved. Added to that the maximum throughput of 7.6 Mbits per second has been achieved for the proposed EO-OFDM technique which is very high than O-OFDM, OAK-OFDM and STBC-OFDM in the MIMO technique.Whereas, under the constraints of non-linear characteristics of LED and limited dynamic range, the overall performance of this experimentation is better than other than state of art techniques.

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Authors and Affiliations

  1. Department of EEE, PSG College of Technology, Coimbatore, 641004, India

    S. Deepthi

  2. Department of ECE, PSG College of Technology, Coimbatore, 641004, India

    P. Visalakshi

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  1. S. Deepthi
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  2. P. Visalakshi
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Correspondence to S. Deepthi.

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Deepthi, S., Visalakshi, P. Enhanced Optical OFDM: A novel approach for SISO and MIMO Visible Light Communication system in indoor environment. Opt Quant Electron 53, 526 (2021). https://doi.org/10.1007/s11082-021-03172-8

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