Experimental Demonstration of RGB LED-Based Optical Camera Communications

Luo, Pengfei; Zhang, Min; Ghassemlooy, Zabih; Minh, Hoa Le; Tsai, Hsin-Mu; Tang, Xuan; Png, Lih Chieh; Han, Dahai

doi:10.1109/jphot.2015.2486680

Cited by 131 publications

(81 citation statements)

References 17 publications

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“…Finally, the original information can be extracted from the brightness of the LED(s) (e.g., ON or OFF state). In undersampled modulation lations (e.g., FSK [8] / Manchester coding [9]) Undersampled modulations UFSOOK [10] UPSOOK [12] UP(Q)AM [11,13] Combined with WDM [14] schemes, there are no requirements for special cameras or Rfc, thus, they can support both long-distance and high spectral efficiency communications.…”

Section: Types Of Occ Systemsmentioning

confidence: 99%

“… Undersampled m-ary pulse amplitude modulation (UPAM) [11,13] -more information is given in Section III.C.  Undersampled modulation with wavelength division multiplexing (WDM) [14] and color shift keying (CSK) -see Section III.D for more information. All the above-mentioned undersampled modulation schemes have a similar internal structure: a baseband modulation module followed by a square-wave SIM modulator module.…”

Section: A Undersampled Frequency Shift On-off Keyingmentioning

confidence: 99%

“…Part C, a complement of Part B, is for acquiring the channel matrix H in the presence of a phase error. Further details on how the channel matrix is extracted and how the ICI problem is addressed can be found in [14].…”

Section: Channel Matrix Estimationmentioning

confidence: 99%

“…Fig. 5(e) [14] shows the measured BER performance against the communication distance d for the long-distance outdoor V2V system. Note that, the value of log10(BER) increases linearly as d increases, and when the distance reaches 60 m, the BER increases to 3.1×10 -3 which is below the FEC limit of 3.8×10 -3 .…”

Section: Practical Experimentsmentioning

confidence: 99%

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Undersampled-Based Modulation Schemes for Optical Camera Communications

Luo

Zhang

Ghassemlooy³

et al. 2018

IEEE Commun. Mag.

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Abstract-Widespread use of white light-emitting diodes and ubiquitous smart devices offer the opportunity to establish visible light communications (VLC) which has become a hot research topic based on the growing number of publications over the last decade. Camera-based VLC, namely optical camera communications (OCC), provide many unique features when compared with a single photodiode-based system, such as the ability to separate incident light in spatial and color domains. OCC technology represents a promising approach to utilize the benefits of VLC in beyond-5G scenarios and is one of the key technologies of the Internet of Things. Establishing a long communication channel in OCC, as well as non-flickering illumination in using low-frame-rate camera detectors, requires special modulation schemes. This article provides an overview of the principles of three categories of modulation schemes for OCC systems using a low-frame-rate camera detector. In addition, a series of undersampled modulation schemes are proposed and discussed to achieve flicker-free OCC with higher spectral efficiency. In addition, framing structures are designed to solve problems occurring in OCC systems using particular modulation schemes. To evaluate the performance of these modulation schemes, measured bit error rate values are shown. Finally, challenges in the implementation of OCC systems are also outlined.Index Terms -optical camera communications, non-flickering illumination, undersampled phase shift ON-OFF keying, undersampled quadrature-amplitude-modulation, visible light communications, optical wireless communications

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Section: Types Of Occ Systemsmentioning

confidence: 99%

Section: A Undersampled Frequency Shift On-off Keyingmentioning

confidence: 99%

Section: Channel Matrix Estimationmentioning

confidence: 99%

Section: Practical Experimentsmentioning

confidence: 99%

See 2 more Smart Citations

Undersampled-Based Modulation Schemes for Optical Camera Communications

Luo

Zhang

Ghassemlooy³

et al. 2018

IEEE Commun. Mag.

Self Cite

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“…Moreover, it is also unclear how to use PCD as an optical terminal to receive optical signal efficiently. Although using a CMOS (Complementary Metal-Oxide Semiconductor) based optical camera module on PCD to serve as an optical terminal for the establishment of an optical wireless communication link has been proposed [8], recent performance presented have shown that only fewer Kb/s can be achieved [9]. …”

Section: Introductionmentioning

confidence: 99%

An Experimental Study of a Micro-Projection Enabled Optical Terminal for Short-Range Bidirectional Multi-Wavelength Visible Light Communications

Chou

Tsai

Jiang

2018

Sensors

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A micro-projection enabled short-range communication (SRC) approach using red-, green- and blue-based light-emitting diodes (RGB-LEDs) has experimentally demonstrated recently that micro-projection and high-speed data transmission can be performed simultaneously. In this research, a reconfigurable design of a polarization modulated image system based on the use of a Liquid Crystal on Silicon based Spatial Light Modulator (LCoS-based SLM) serving as a portable optical terminal capable of micro-projection and bidirectional multi-wavelength communications is proposed and experimentally demonstrated. For the proof of concept, the system performance was evaluated through a bidirectional communication link at a transmission distance over 0.65 m. In order to make the proposed communication system architecture compatible with the data modulation format of future possible wireless communication system, baseband modulation scheme, i.e., Non-Return-to-Zero On-Off-Keying (NRZ_OOK), M-ary Phase Shift Keying (M-PSK) and M-ary Quadrature Amplitude Modulation (M-QAM) were used to investigate the system transmission performance. The experimental results shown that an acceptable BER (satisfying the limitation of Forward Error Correction, FEC standard) and crosstalk can all be achieved in the bidirectional multi-wavelength communication scenario.

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Progress in Color Conversion Technology for Micro‐LED

Chen

et al. 2022

Adv Materials Technologies

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LCD (TFT-LCD) improved this problem. [3] As a display technology that is lightweight and not inferior to CRT, it quickly replaced CRT and became one of the most mainstream displays on the market at that time. The characteristics of LCD still have the disadvantage of limited contrast and poor flexibility. In recent years, the most mature and comprehensive display technology in the market is organic light-emitting diode (OLED). [4] Compared with LCD, its self-luminous ability, transparency, true dark tone, and manufacturing flexibility are one of the highlights of OLED, and it has been widely used in the market. [5,6] The disadvantage is that it is technically difficult to make materials and control color stability, and at the same time, it has high cost, low yield, short lifespan, and

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Experimental Demonstration of RGB LED-Based Optical Camera Communications

Cited by 131 publications

References 17 publications

Undersampled-Based Modulation Schemes for Optical Camera Communications

Undersampled-Based Modulation Schemes for Optical Camera Communications

An Experimental Study of a Micro-Projection Enabled Optical Terminal for Short-Range Bidirectional Multi-Wavelength Visible Light Communications

Progress in Color Conversion Technology for Micro‐LED

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