Beacon Jointed Packet Reconstruction Scheme for Mobile-Phone Based Visible Light Communications Using Rolling Shutter

Wang, Wei-Chung; Chow, Chi‐Wai; Chen, Chia-Wei; Hsieh, Hsiang-Chain; Chen, Yen‐Ting

doi:10.1109/jphot.2017.2762460

Cited by 30 publications

(20 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 3rd order polynomial curve fitting offers the least processing time (i.e., 0.95 ms) for the same image processing hardware [79]. The variations of n-th order polynomial curve fitting and the iterative schemes are preferable in most RS-OCCs due to their lower processing times and less complex implementation [23,74,76,77,82].…”

Section: Rolling-shutter-based Occmentioning

confidence: 99%

“…Hence, there is a need for advanced signal processing in order to separate these patterns. It is important to note that decoding of the 2D RS pattern with reduced offset tolerance and flexibility requires capturing lights from all LEDs using the IS [82].…”

Section: Rolling-shutter-based Occmentioning

confidence: 99%

“…As mentioned previously, the data rate can also be increased further. There are some noticeable solutions, e.g., a high-speed camera with a frame rate of beyond 1000 fps and a reduced resolution On the other hand, the RS OCC encounters interframe synchronization due to a considerable delay between the consecutive frames captured, depending on the frame-saving period for each frame [82]. It is an inconsistent period across different camera hardware, due to image processing and storage speed.…”

Section: Data Rate Efficiencymentioning

confidence: 99%

See 2 more Smart Citations

Optical Camera Communications: Principles, Modulations, Potential and Challenges

et al. 2020

View full text Add to dashboard Cite

Optical wireless communications (OWC) are emerging as cost-effective and practical solutions to the congested radio frequency-based wireless technologies. As part of OWC, optical camera communications (OCC) have become very attractive, considering recent developments in cameras and the use of fitted cameras in smart devices. OCC together with visible light communications (VLC) is considered within the framework of the IEEE 802.15.7m standardization. OCCs based on both organic and inorganic light sources as well as cameras are being considered for low-rate transmissions and localization in indoor as well as outdoor short-range applications and within the framework of the IEEE 802.15.7m standardization together with VLC. This paper introduces the underlying principles of OCC and gives a comprehensive overview of this emerging technology with recent standardization activities in OCC. It also outlines the key technical issues such as mobility, coverage, interference, performance enhancement, etc. Future research directions and open issues are also presented.

show abstract

Section: Rolling-shutter-based Occmentioning

confidence: 99%

Section: Rolling-shutter-based Occmentioning

confidence: 99%

Section: Data Rate Efficiencymentioning

confidence: 99%

See 1 more Smart Citation

Optical Camera Communications: Principles, Modulations, Potential and Challenges

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In [8], a data rate of 150 bps was achieved using a red-green-blue (RGB) LEDs and a 50-fps in an IS-based VLC link. Alternatively, mobile-phone based VLC with a beacon jointed packet transmission scheme with rolling shutter (RS) was deployed with a data rate and R f of 10.3 kbps and 60 fps for a link distance of 20 cm [9].…”

Section: Introductionmentioning

confidence: 99%

Data Rate Enhancement in Optical Camera Communications Using an Artificial Neural Network Equaliser

et al. 2020

View full text Add to dashboard Cite

In optical camera communication (OCC) systems leverage on the use of commercial off-the-shelf image sensors to perceive the spatial and temporal variation of light intensity to enable data transmission. However, the transmission data rate is mainly limited by the exposure time and the frame rate of the camera. In addition, the camera's sampling will introduce intersymbol interference (ISI), which will degrade the system performance. In this paper, an artificial neural network (ANN)-based equaliser with the adaptive algorithm is employed for the first time in the field of OCC to mitigate ISI and therefore increase the data rate. Unlike other communication systems, training of the ANN network in OCC is done only once in a lifetime for a range of different exposure time and the network can be stored with a look-up table. The proposed system is theoretically investigated and experimentally evaluated. The results record the highest bit rate for OCC using a single LED source and the Manchester line code (MLC) non-return to zero (NRZ) encoded signal. It also demonstrates 2 to 9 times improved bandwidth depending on the exposure times where the system's bit error rate is below the forward error correction limit. INDEX TERMS Optical camera communication, ANN equaliser, visible light communications, rolling shutter.

show abstract

“…Wireless communications using optical cameras as receivers, called optical camera communication (OCC), has attracted considerable attention. OCC is a special type of visible light communication (VLC) that uses rapidly changing visible light produced by light emitting diodes (LEDs) to carry information and an optical camera to receive the light signals [1]- [4]. By using light panels as transmitters (Tx) [5], [6], received images will have higher quality than Tx using LED point sources, which makes the decoding process easier.…”

Section: Introductionmentioning

confidence: 99%

Color-Shift Keying for Optical Camera Communication Using a Rolling Shutter Mode

et al. 2019

View full text Add to dashboard Cite

An optical camera communication (OCC) is a special type of a visible light communication that uses a complementary metal-oxide semiconductor as a receiver. However, it is difficult to apply a high-order modulation scheme to such communications because of strong intersymbol interference. In this paper, we propose and demonstrate an OCC system using an 8-color color-shift keying scheme. We used an RGB-based LED light panel as a transmitter and analyzed the properties of the rolling shutter. We discuss the demodulation process and perform bit error rate (BER) tests at different ambient illuminances and sampling positions. A net data rate of 8.64 kbps and a pixel efficiency of 3.75 pixels per bit were achieved while keeping the BER below 3.8E-3, which meets the FEC's 7% forward error correction requirement. In addition, the system shows good robustness for indoor applications.

show abstract

Beacon Jointed Packet Reconstruction Scheme for Mobile-Phone Based Visible Light Communications Using Rolling Shutter

Cited by 30 publications

References 16 publications

Optical Camera Communications: Principles, Modulations, Potential and Challenges

Optical Camera Communications: Principles, Modulations, Potential and Challenges

Data Rate Enhancement in Optical Camera Communications Using an Artificial Neural Network Equaliser

Color-Shift Keying for Optical Camera Communication Using a Rolling Shutter Mode

Contact Info

Product

Resources

About