Optical camera communication (OCC) using a laser-diode coupled optical-diffusing fiber (ODF) and rolling shutter image sensor

Tsai, Deng-Cheng; Chang, Yun-Han; Chow, Chi‐Wai; Yang, Liu; Yeh, Chien‐Hung; Peng, Ching-Wei; Hsu, Ling-Yuan

doi:10.1364/oe.449860

Cited by 15 publications

(12 citation statements)

References 30 publications

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“…On the other hand, in scenarios where the signal-to-noise ratio (SNR) is not high and ZF equalisers are limited, MMSE equalisers would be more suitable. Equation (5) shows the calculation of the matrix that is used to approximate the received signal to the transmitted signal.…”

Section: Multispectral Camera Communicationmentioning

confidence: 99%

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Multispectral Optical camera communication links based on spectral signature multiplexing

Moreno

Guerra²,

Rufo

et al. 2023

IET Optoelectronics

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Optical camera communication is foreseen to have an essential role in future systems requiring wireless communication capability. In this regard, high‐spectral‐resolution cameras, such as multispectral (MS) cameras, present specific characteristics that can be exploited to provide new features to optical camera communication links. Using the MS cameras' features to take advantage of the light‐emitting diode (LED) behaviour in a novel communication scheme is focussed. Notably, LED spectral response curves are different when their temperature changes. Therefore, these differences can be detected based on the MS cameras' spectral resolution. Thus, more than one communication channel can be attained using the same LED device since the camera can distinguish the different LED spectral signatures. This new approach is analysed in this work, including some equalisation techniques applied to the channel matrix in the receiver to improve the extraction of the transmitted signal reducing the inter‐channel interference. For the specific MS camera employed in the experiments, up to two distinct channels could be obtained with the same transmitter at different temperatures, getting a bit error rate below the forward error correction limit. However, obtaining satisfactory results is highly dependent on the variation that temperature causes in the spectral signatures of the LEDs, so further experiments are recommended in future work with different devices.

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Section: Multispectral Camera Communicationmentioning

confidence: 99%

“…Furthermore, Tsai et al proposed a pixelrow-per-bit-based neural network to decode data produced by an optical-diffusing-fibre (ODF) transmitter in an OCC link. The authors demonstrated that the proposed algorithm enhanced the BER compared to traditional artificial neural network (ANN) [5].…”

mentioning

confidence: 99%

Multispectral Optical camera communication links based on spectral signature multiplexing

Moreno

Guerra²,

Rufo

et al. 2023

IET Optoelectronics

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“…By using decision feedback equalization (DFE) with 40 feed-forward and 20 feed-backwards taps, the intersymbol interference (ISI) of the on-off-keying (OOK) signal was mitigated, achieving 1.1 Gbit/s operation. In 2022, Tsai et al proposed and illustrated a 360 o wide FOV optical camera communication (OCC) system using a phosphor-coated light diffusing fiber [41]. When blue laser diode (LD) was coupled at one end of the light diffusing fiber, blue light was scattered and emitted at the fiber circumference.…”

Section: Introductionmentioning

confidence: 99%

Bi-directional Free-Space Visible Light Communication (VLC) Supporting Multiple Moveable Clients Using Special Light Diffusing Optical Fiber (LDOF)

Chang¹,

Chow²,

Lin³

et al. 2023

Preprint

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Visible light communication (VLC) can offer the advantages of license and electromagnetic interference (EMI) free wireless transmission. As optical signal does not interference with the radio-frequency (RF) signal, VLC can be used to augment RF wireless communication to provide extra communication capacity while without degrading the performance of both signals. In order to achieve high performance VLC transmission, optical alignment between the optical transmit (Tx) and receiver (Rx) is very critical to enhance the received signal-to-noise ratio (SNR). Optical beam-steering at the Tx can be utilized to ensure narrow optical beam can reach the Rx; however, complicated and active tracking are required. Lenses or compound parabolic concentrators (CPCs) can be install in front of the Rx for focusing to enhance the SNR. However, these will limit the Rx field-of-view (FOV) and making the VLC transmission more subjected to misalignment issue. Hence, many creative optical antennas have been proposed and demonstrated using special optical materials as well as special Rx to enhance the FOV of VLC systems. However, they have their limitations, such as data rates and FOVs. In this work, we put forward and demonstrate a bi-direction free-space VLC system supporting multiple moveable Rxs using a light-diffusing optical fiber (LDOF). The downlink (DL) signal is launched from an head-end or central office (CO) far away to the LDOF at the client side via a free-space transmission. When the DL signal is launched to the LDOF, which acts as an optical antenna to re-transmit the DL signal to different moveable Rxs. The uplink (UL) signal is sent via the LDOF towards the CO. In a proof-of-concept demonstration, the LDOF is 100 cm long and the free space VLC transmission between the CO and the LDOF is 100 cm. 210 Mbit/s DL and 850 Mbit/s UL transmissions, meeting the pre-forward-error-correction bit error rate (pre-FEC BER = 3.8 × 10−3) threshold are achieved.

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“…By using decision feedback equalization (DFE) with 40 feed-forward and 20 feed-backward taps, the intersymbol interference (ISI) of the on-off-keying (OOK) signal was mitigated, achieving 1.1 Gbit/s operation. In 2022, Tsai et al proposed and illustrated a 360° wide FOV optical camera communication (OCC) system using a phosphor-coated light diffusing fiber [ 41 ]. When a blue laser diode (LD) was coupled at one end of the light-diffusing fiber, blue light was scattered and emitted at the fiber circumference.…”

Section: Introductionmentioning

confidence: 99%

“…The LDOF used here is the same as that in ref. [ 41 ]; however, ref. [ 41 ] is based on rolling shutter-based OCC.…”

Section: Introductionmentioning

confidence: 99%

Bi-Directional Free-Space Visible Light Communication Supporting Multiple Moveable Clients Using Light Diffusing Optical Fiber

Chang

Chow

Lin

et al. 2023

Sensors

Self Cite

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In this work, we put forward and demonstrate a bi-direction free-space visible light communication (VLC) system supporting multiple moveable receivers (Rxs) using a light-diffusing optical fiber (LDOF). The downlink (DL) signal is launched from a head-end or central office (CO) far away to the LDOF at the client side via a free-space transmission. When the DL signal is launched to the LDOF, which acts as an optical antenna to re-transmit the DL signal to different moveable Rxs. The uplink (UL) signal is sent via the LDOF towards the CO. In a proof-of-concept demonstration, the LDOF is 100 cm long, and the free space VLC transmission between the CO and the LDOF is 100 cm. 210 Mbit/s DL and 850 Mbit/s UL transmissions meet the pre-forward-error-correction bit error rate (pre-FEC BER = 3.8 × 10−3) threshold.

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Optical camera communication (OCC) using a laser-diode coupled optical-diffusing fiber (ODF) and rolling shutter image sensor

Cited by 15 publications

References 30 publications

Multispectral Optical camera communication links based on spectral signature multiplexing

Multispectral Optical camera communication links based on spectral signature multiplexing

Bi-directional Free-Space Visible Light Communication (VLC) Supporting Multiple Moveable Clients Using Special Light Diffusing Optical Fiber (LDOF)

Bi-Directional Free-Space Visible Light Communication Supporting Multiple Moveable Clients Using Light Diffusing Optical Fiber

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