پیوندهای مفید
اخبار و اعلانات
آمار
| تعداد نشریات | 11 |
| تعداد شماره‌ها | 210 |
| تعداد مقالات | 2,098 |
| تعداد مشاهده مقاله | 2,878,770 |
| تعداد دریافت فایل اصل مقاله | 2,086,428 |
Indoor Non-directed Optical Wireless Communications Optimization of the Lambertian Order | ||
| Journal of Electrical and Computer Engineering Innovations (JECEI) | ||
| مقاله 1، دوره 1، شماره 1، فروردین 2013، صفحه 1-10 اصل مقاله (594 K) | ||
| نوع مقاله: Review paper | ||
| شناسه دیجیتال (DOI): 10.22061/jecei.2013.1660 | ||
| نویسندگان | ||
| F. Ghassemlooy* 1؛ D. Wu1؛ M.A. Khalighi2؛ X. Tang3 | ||
| 1Optical Communications Research Group, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, UK | ||
| 2Ecole Centrale Marseille, Institute Fresnel, Marseille, France | ||
| 3Department of Electronic Engineering, Tsinghua University, Beijing, China | ||
| تاریخ دریافت: 10 اردیبهشت 1392، تاریخ بازنگری: 24 خرداد 1392، تاریخ پذیرش: 24 خرداد 1392 | ||
| چکیده | ||
| For an indoor non-directed line of sight optical wireless communication (NLOS-OWC) system we investigate the optimized Lambertian order (OLO) of light-emitting diodes (LEDs). We firstly derive an expression for the OLO from a conventional Lambertian LED model. Then, we analyze the indoor multi-cell NLOS-OWC channel characteristics including the optical power distribution and the multipath time dispersion for two cases of one-cell and four-cell configurations. Furthermore, we estimate the transmission bandwidth by simulating the channel frequency response. Numerical results presented show that, by using OLO a significant improvement of the transmission bandwidth can be achieved for an indoor NLOS-OWC system, in particular, for multi-cell configurations. | ||
| مراجع | ||
|
[1] W. Ke, A. Nirmalathas, C. Lim, and E. Skafidas, "4×12.5 Gb/s WDM optical wireless communication system for indoor applications," Lightwave Technology, Journal of, vol. 29, pp. 1988-1996, 2011.
[2] H. Chen, H. van den Boom, E. Tangdiongga, and A. Koonen, "30Gbit/s Bi-directional Transparent Optical Transmission with an MMF Access and an Indoor Optical Wireless Link," Photonics Technology Letters, IEEE, vol. PP, pp. 1-1, 2012.
[3] F. E. Alsaadi and J. M. H. Elmirghani, "Beam power and angle adaptation in multibeam 2.5 Gbit/s spot diffusing mobile optical wireless system," Selected Areas in Communications, IEEE Journal on, vol. 28, pp. 913-927, 2010.
[4] R. J. Green, H. Joshi, M. D. Higgins, and M. S. Leeson, "Recent developments in indoor optical wireless systems," IET Communications, vol. 2, pp. 3-10, 2008.
[5] S. Jivkova and M. Kavehrad, "Indoor wireless infrared local access, multi-spot diffusing with computer generated holographic beam-splitters," in Communications, 1999. ICC '99. 1999 IEEE International Conference on, vol. 1, pp. 604-608, 1999.
[6] N. M Aldibbiat, Z. Ghassemlooy, and R McLaughlin, "Indoor optical wireless systems employing dual header pulse interval modulation (DH‐PIM)," International Journal of Communication Systems, vol. 18, no. 13, pp. 285-305, 2003.
[7] H. Elgala, R. Mesleh, and H. Haas, "Indoor optical wireless communication: potential and state-of-the-art," Communications Magazine, IEEE, vol. 49, pp. 56-62, 2011.
[8] L. Xia, J. Vucic, V. Jungnickel, and J. Armstrong, "On the Capacity of Intensity-Modulated Direct-Detection Systems and the Information Rate of ACO-OFDM for Indoor Optical Wireless Applications," Communications, IEEE Transactions on, vol. 60, pp. 799-809, 2012.
[9] M. Hoa Le, D. O'Brien, G. Faulkner, Z. Lubin, L. Kyungwoo, J. Daekwang, O. YunJe, and W. Eun Tae, "100-Mb/s NRZ Visible Light Communications Using a Postequalized White LED," IEEE Photonics Technology Letters, vol. 21, pp. 1063-1065, 2009.
[10] D. O'Brien, G. Parry, and P. Stavrinou, "Optical hotspots speed up wireless communication," Nature Photonics, vol. 1, pp. 245-247, 2007.
[11] R. J. Green, H. Joshi, M. D. Higgins, and M. S. Leeson, "Recent developments in indoor optical wireless systems," IET Communications, vol. 2, pp. 3-10, 2008.
[12] D. Jupeng, H. Zhitong, and J. Yuefeng, "Evolutionary Algorithm Based Power Coverage Optimization for Visible Light Communications," Communications Letters, IEEE, vol. 16, pp. 439-441, 2012.
[13] M. D. Higgins, R. J. Green, M. S. Leeson, and E. L. Hines, "Multi-user indoor optical wireless communication system channel control using a genetic algorithm," Communications, IET, vol. 5, pp. 937-944, 2011.
[14] W. Zixiong, Y. Changyuan, Z. Wen-De, C. Jian, and C. Wei, "Performance of a novel LED lamp arrangement to reduce SNR fluctuation for multi-user visible light communication systems," Opt. Express, vol. 20, 2012.
[15] J. B. Carruthers and S. M. Carroll, "Statistical impulse response models for indoor optical wireless channels," International Journal of Communication Systems, vol. 18, pp. 267-284, 2005.
[16] J. B. Carruther and J. M. Kahn, "Angle diversity for nondirected wireless infrared communication," Communications, IEEE Transactions on, vol. 48, pp. 960-969, 2000.
[17] D. Wu, Z. Ghassemlooy, M. Hoa Le, S. Rajbhandari, and Y. S. Kavian, "Power distribution and Q-factor analysis of diffuse cellular indoor visible light communication systems," in European Conference on Networks and Optical Communications (NOC), Newcastle Upon Tyne UK, 2011.
[18] D. Wu, Z. Ghassemlooy, M. Hoa Le, S. Rajbhandari, and C. Lu, "Channel characteristics analysis of diffuse indoor cellular optical wireless communication systems," Proc. of SPIE, vol. 8309, 2011.
[19] T. Borogovac, M. Rahaim, and J. B. Carruthers, "Spotlighting for visible light communications and illumination," in IEEEGLOBECOM Workshops (GC Wkshps), 2010 IEEE, 2010, pp. 1077-1081.
[20] J. M. Kahn and J. R. Barry, "Wireless infrared communications," Proceedings of IEEE, vol. 85, pp. 265-298, 1997.
[21] F. R. Gfeller and U. Bapst, "Wireless in-house data communication via diffuse infrared radiation," Proceedings of the IEEE, vol. 67, pp. 1474- 1486, 1979.
[22] F. R. Gfeller and U. Bapst, "Wireless in-house data communication via diffuse infrared radiation," Proceedings of the IEEE, vol. 67, pp. 1474- 1486, 1979.
[23] L. Kwonhyung, P. Hyuncheol, and J. R. Barry, "Indoor channel characteristics for visible light communications," IEEE Communications Letters, vol. 15, pp. 217-219, 2011.
[24] J. B. Carruthers, S. M. Caroll, and P. Kannan, "Propagation modelling for indoor optical wireless communications using fast multi-receiver channel estimation," IEE Proceedings- Optoelectronics, vol. 150, pp. 473-481, 2003.
[25] Z. Ghassemlooy, W. O. Popoola, and S. Rajbhandari, Optical Wireless Communications – System and Channel Modelling with Matlab, CRC publisher, USA, August 2012, ISBN: 978-4398-5188-3. | ||
|
آمار تعداد مشاهده مقاله: 230 تعداد دریافت فایل اصل مقاله: 174 |
||