Performance Analysis of DCO-OFDM and ACO-OFDM for Visible Light Communication System

Alindra, Rahmayati; Fauzan, Muchamad Octariawan; Ramadhan, Reyhan; Rahardjo, Sasono

doi:10.1109/issimm.2018.8727737

Cited by 8 publications

(4 citation statements)

References 6 publications

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“…Optical wireless communication (OWC) was a successful standard for developing the speeds of data transfer in the transmission medium. Infrared and visible light communication was able to offer several hundred Mbps [10]. In addition to providing a compatible approach that does not conflict with RF technologies, OWC gains from license-free operating over a considerably broader range of products [11].…”

Section: Optical Ofdm Systemmentioning

confidence: 99%

BER performance study for optical OFDM of optical camera communication

Jihad

Satar²

2021

IJECE

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In this article, different forms of optical orthogonal frequency division multiplexing (OFDM) were observed which were suitable for optical camera communication (OCC) systems. This research aims to establish the bit error rate (BER) versus signal-to-noise ratio (SNR) of the OCC system. This research will focus on OCC systems and the design that produces the noise of the clipping but will gain SNR as a whole if an optimum clipping factor is chosen. The BER versus SNR analysis was investigated for the different clipping factors 0.7, 1.4, and 2.6. The BER performance of the asymmetrically clipped optical OFDM (ACO-OFDM) was also compared with the direct current optical OFDM (DCO-OFDM) to show the suitable effectiveness of the proposed approach. ACO-OFDM was considered to be better due to lower bit loading, but DCO-OFDM was efficient for higher SNR values. This was because the DC bias used was inefficient in terms of optical capacity, while ACO-OFDM used only half of the subcarriers to transmit the information. Moreover, ACO-OFDM two-dimensional half-subcarriers of mapping rule would introduce the clipping noise to its unused 2D subcarriers, although further data can be provided by the 2D DCO-OFDM mapping rule.

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Section: Optical Ofdm Systemmentioning

confidence: 99%

BER performance study for optical OFDM of optical camera communication

Jihad

Satar²

2021

IJECE

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“…In this paper, two types of unipolar OFDM have been employed. They are asymmetrically clipped optical OFDM (ACO-OFDM) from and DC-biased optical OFDM (DCO-OFDM) from [7]. The bipolar signal of ACO-OFDM is clipped to zero while in DCO-OFDM, a DC bias is added to remove the negative values.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid NOMA/OFDM Model for Next Generation Communication Systems

Hussein,

Bouallegue

2024

Preprint

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Visible light communication (VLC) is an innovative optical wireless communication (OWC) technology that can provide both lighting and high-speed wireless data transmission. Another advantages of VLC system that allow for a wide range of applications are its fast data rate, reliable communication channels, and interference protection against electromagnetic (EM) waves. Light Emitting Diodes (LEDs) are used as transmitters while Photodetectors are utilized at the receiver side. The LED has to be supplied with a positive real valued signal. Orthogonal frequency division multiplexing (OFDM) uses multiple subcarriers with orthogonal frequencies to enhance the spectral efficiency of the system. There are two types of unipolar OFDM used to obtain real-valued and positive signal, they are DC-biased optical OFDM (DCO-OFDM) and asymmetrically clipped optical OFDM (ACO-OFDM). A hybrid design NOMA/OFDM is introduced in this paper to be able to study the performance of the VLC system. Three users are positioned in different spots throughout an interior environment. User1 is considered as the farthest user with lower channel gain while user3 is the near user that has high channel gain. The bit error rate (BER) is estimated for the three users vs. the SNR with different power allocation coefficients. The results show that NOMA/ACO-OFDM performs better than NOMA/DCO-OFDM. Also, the BER of the three users converges to each other with the increasing of the SNR for the two models.

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“…Both of them employ a simple ON-OFF keying (OOK) modulation. A performance improvement can be achieved at the expense of more complex modulation/demodulation approaches: in [11], quaternary-amplitudeshift-keying (4-ASK) modulation allowed a 20-fold performance increase with respect to OOK; in [12], 2.8 Gb/s at 12 cm is obtained with a blue microled and orthogonal frequency division multiplexing (OFDM) modulation [13]; in [14], wavelength division multiplexing (WDM) applied to a red, green, blue (RGB) LED allowed 3.4 Gb/s at 10 cm.…”

Section: Introductionmentioning

confidence: 99%

FPGA-Based Visible Light Communications Instrument for Implementation and Testing of Ultralow Latency Applications

Ricci

Caputo

Mucchi

2023

IEEE Trans. Instrum. Meas.

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Visible light communication (VLC) employs the modulation of light energy to establish a data connection at a short range. The end-to-end data latency is a significant concern due to the ever-increasing constraints imposed by new applications and standards like sixth generation (6G). To enhance data rate and communication distance, researchers are proposing more calculation-demanding modulation/demodulation techniques. However, implementing these techniques in real-time and ultralow latency environments is challenging. In this article, the authors propose an open system that integrates a programmable VLC front-end with a robust back-end based on a field-programmable gate array (FPGA) to address this challenge. The front-end can drive LEDs with up to 1 A over a bandwidth of 0.01-10 MHz and is programmed via an easy MATLAB interface. With the FPGA framework, users can implement various low-latency VLC applications by modifying a minimal part of the code. The system is demonstrated by implementing two applications: a 1.56-Mb/s link based on chirp coding and a 100-kb/s link based on Manchester modulation that complies with IEEE 802.15.7. In both cases, the bit latency was under 50 µs, and transmission errors were not detected when the input signal-to-noise ratio (SNR) was greater than 1 and −2 dB, respectively.

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Performance Analysis of DCO-OFDM and ACO-OFDM for Visible Light Communication System

Cited by 8 publications

References 6 publications

BER performance study for optical OFDM of optical camera communication

BER performance study for optical OFDM of optical camera communication

A Hybrid NOMA/OFDM Model for Next Generation Communication Systems

FPGA-Based Visible Light Communications Instrument for Implementation and Testing of Ultralow Latency Applications

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