Coded OFDM and OFDM/OQAM for intensity modulated optical wireless systems

被引：3
作者：
Tabach, Mamdouh El [1 ]
Tortelier, Patrick [1 ]
Pyndiah, Ramesh [2 ]
Bouchet, Olivier [1 ]
机构：
[1] France Télécom, Orange Labs, 35512 Cesson-Sévigné Cedex
[2] IT-TELECOM Bretagne, SC Department, Technopôle Brest-Iroise, CS 83818
来源：
Journal of Communications | 2009年 / 4卷 / 08期
关键词：
COFDM; FSO; IM/DD; Infrared; Intensity modulation; Optical wireless; OQAM; OW;
D O I：
10.4304/jcm.4.8.555-564
中图分类号：
学科分类号：
摘要：
Infrared optical wireless (OW) is a promising technology associating free-space propagation and infrared radiation for home networks. OW offers several advantages over radio technologies, making it an attractive solution for short range communications. However, OW technology is not as mature as for radio; further advanced studies regarding optical components and physical layer issues are still open. Coded orthogonal modulations such as Coded OFDM (COFDM) are currently used in many radio and fixed transmission systems. Among these modulations, COFDM/OQAM is an interesting alternative to classical COFDM modulation, as it does not require the use of a guard interval and it has an optimal spectral efficiency. In this paper, we present a comparative study of modified COFDM and modified COFDM/OQAM schemes adapted to intensity modulation and direct detection over a diffuse channel based on experimental measurements. If M-ary QAM modulation is used, the two schemes offer the possibility to increase the bit rate of OW communications. They also mitigate the effects of inter symbol interference (ISI). On the other hand, modified COFDM/OQAM could outperform modified COFDM schemes with a cyclic-prefix. © 2009 Academy Publisher.
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页码：555 / 564
页数：9
相关论文
共 16 条
  • [1] Ghassemlooy Z., Hayes A.R., Indoor optical wireless communications systems - Part I: Review, School of Engineering, (2003)
  • [2] Bouchet O., El Tabach M., Leroux D., Besnard P., Bertrand M., Personal optical wireless communications: A generic LOS/WLOS propagation model, WWRF 19, (2007)
  • [3] Le Floch B., Alard M., Berrou C., Coded orthogonal frequency division multiplex, IEEE Proceedings, 83, 6, pp. 982-996, (1995)
  • [4] Tanaka Y., Komine T., Haruyama S., Nakagawa M., A basic study of optical OFDM system for indoor visible communication utilizing plural white LEDs as lightening, ISMOT, pp. 303-306, (2001)
  • [5] Siohan P., Siclet C., Lacaille N., Analysis and design of OFDM/OQAM systems based on filterbank theory, IEEE Transactions on Signal Processing, 50, 5, pp. 1170-1183, (2002)
  • [6] Bolcskei H., Orthogonal frequency division multiplexing based on offset QAM, Advances in Gabor Analysis, pp. 321-352, (2003)
  • [7] El Tabach M., Javaudin J.P., Helard M., Spatial data multiplexing over OFDM/OQAM modulations, IEEE Proceedings, ICC, pp. 4201-4206, (2007)
  • [8] Lin H., Siohan P., OFDM/OQAM with Hermitian symmetry: Design and performance for baseband communication, IEEE Proceedings, ICC, pp. 652-656, (2008)
  • [9] Kahn J.M., Barry J.R., Wireless infrared communications, IEEE Proceedings, pp. 265-298, (1997)
  • [10] Barry J.R., Kahn J.M., Krause W., Lee E., Messerschmitt D.G., Simulation of multipath impulse response for indoor wireless optical channels, IEEE J. Select. Areas in Comm., 11, 3, pp. 367-379, (1993)
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