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A Novel Indoor Mobile Localization System Based on Optical Camera Communication
Hossan, Md. Tanvir,Chowdhury, Mostafa Zaman,Islam, Amirul,Jang, Yeong Min WILEY INTERSCIENCE 2018 WIRELESS COMMUNICATIONS AND MOBILE COMPUTING Vol.2018 No.-
<P>Localizing smartphones in indoor environments offers excellent opportunities for e-commence. In this paper, we propose a localization technique for smartphones in indoor environments. This technique can calculate the coordinates of a smartphone using existing illumination infrastructure with light-emitting diodes (LEDs). The system can locate smartphones without further modification of the existing LED light infrastructure. Smartphones do not have fixed position and they may move frequently anywhere in an environment. Our algorithm uses multiple (i.e., more than two) LED lights simultaneously. The smartphone gets the LED-IDs from the LED lights that are within the field of view (FOV) of the smartphone’s camera. These LED-IDs contain the coordinate information (e.g., <TEX>$ x$</TEX> - and <TEX>$ y$</TEX> -coordinate) of the LED lights. Concurrently, the pixel area on the image sensor (IS) of projected image changes with the relative motion between the smartphone and each LED light which allows the algorithm to calculate the distance from the smartphone to that LED. At the end of this paper, we present simulated results for predicting the next possible location of the smartphone using Kalman filter to minimize the time delay for coordinate calculation. These simulated results demonstrate that the position resolution can be maintained within 10 cm.</P>
IEEE 802.15.7m Optical Wireless Communication 표준화 동향
Md.Tanvir Hossan,홍창현,Trang Nguyen,Nam Tuan Le,장영민 한국통신학회 2016 정보와 통신 Vol.33 No.11
IEEE 802.15.7 VLC(Visible Light Communication) 규격 이후에 카메라 기반 ISC(Image Sensor Communication) 관련 개정 필요성이 제기되어서 현재 IEEE 802.15.7m OWC(Optical Wireless Communication) TG가 표준화를 진행 중에 있다. 2016년 5월에 결정된 Baseline Document D0를 기반으로 LiFi(Light Fidelity), OCC(Optical Camera Communication) 및 LED-ID(LED Identification) 기술로 간단하게 분류하고 각 핵심 변조 기법을 소개한다. 5세대 이동통신과 함께 사용될 수 있는 다양한 IoT/ M2M 응용 서비스(LED, 디지털사이니지, 방송, 자동차 안전, 디스플레이 등)들이 포함되어 있다. 국내에서 혁신적인 비즈니스 모델 발굴과 국내 산/학/연/관이 협력하여 가시광, 적외선 및 자외선 분야에서 적극적인 연구개발이 있어야 할 것이다.
Human Bond Communication with Head-Mounted Displays: Scope, Challenges, Solutions, and Applications
Hossan, Md. Tanvir,Chowdhury, Mostafa Zaman,Shahjalal, Md.,Jang, Yeong Min Institute of Electrical and Electronics Engineers 2019 IEEE communications magazine Vol.57 No.2
<P>In this article, we introduce a human bond communication (HBC) method, based on head-mounted displays (HMDs), which enables continuous bidirectional communication among multiple users with or without Internet connections. The disadvantages of the existing technologies limit the scope of this study to provide a communication platform for HMD-based HBC. However, the features of the optical camera communication (OCC) technology will enrich the possibilities of HBC. This leads us to introduce a visual communication approach for virtual applications. To deploy OCC in HMDs for HBC, the camera of an HMD can be used as a receiver, while a near-infrared light source must be added to the HMD as a transmitter. We also discuss some potential future applications, suggest effective architectures, and briefly describe the scope, challenges, and solutions of OCC-based HMDs for HBC.</P>
Shahjalal, Md.,Hossan, Md. Tanvir,Hasan, Moh. Khalid,Chowdhury, Mostafa Zaman,Le, Nam Tuan,Jang, Yeong Min WILEY INTERSCIENCE 2018 WIRELESS COMMUNICATIONS AND MOBILE COMPUTING Vol.2018 No.-
<P>Optical camera communication (OCC) exhibits considerable importance nowadays in various indoor camera based services such as smart home and robot-based automation. An android smart phone camera that is mounted on a mobile robot (MR) offers a uniform communication distance when the camera remains at the same level that can reduce the communication error rate. Indoor mobile robot navigation (MRN) is considered to be a promising OCC application in which the white light emitting diodes (LEDs) and an MR camera are used as transmitters and receiver, respectively. Positioning is a key issue in MRN systems in terms of accuracy, data rate, and distance. We propose an indoor navigation and positioning combined algorithm and further evaluate its performance. An android application is developed to support data acquisition from multiple simultaneous transmitter links. Experimentally, we received data from four links which are required to ensure a higher positioning accuracy.</P>