Performance Enhancement of Optical Wireless OFDM Communication

Eltoukhi, Muhammed A.; Abd-Elnaby, Mohammed; El-Dolil, Sami A.; El-Samie, Fathi Abd

doi:10.21608/mjeer.2017.63619

Performance Enhancement of Optical Wireless OFDM Communication

Document Type : Original Article

Authors

¹ Dept. of electronics and comm. Engineering, Delta Academy of Engineering and Technology, Mansoura, Egypt

² Dept. of electronics and comm. Engineering, Faculty of Elect., Eng., Menoufia University, Egypt.

³ Dept. of electronics and comm. Engineering, Faculty of Elect., Eng., Menoufia University, Egypt

10.21608/mjeer.2017.63619

Abstract

^{Optical wireless Communication (OWC) is an optical radiation}^{for data transmission through free space, and it can be operated}^{indoor and outdoor. Asymmetrically clipped DC-biased Optical}^{OFDM (ADO-OFDM) is a type of indoor OWC based OFDM.A}^{conventional asymmetrically clipping optical (ACO)-OFDM is}^{applied to modulate odd subcarriers while even subcarriers are}^{modulated by a novel technique called DC-biased optical OFDM}^{(DCO-OFDM). ADO has better optical power performance than}^{conventional ACO-OFDM and DCO-OFDM methods. The main}^{drawback of ADO is the clipping noise which falls just on the}^{even subcarriers. So, in this paper convolutional and turbo}^{coding techniques are investigated to improve the error}^{performance of ADO-OFDM system over Additive White}^{Gaussian Noise (AWGN) and diffuse channel. Simulation results}^{show that the proposed coded ADO-OFDM using convolutional}^{and turbo coding techniques achieve significantly lower bit error}^{rate (BER) compared to the uncoded ADO-OFDM. In addition,}^{turbo coded ADO-OFDM gives the best BER performance}.

References

-webkit-text-stroke-width: 0px; "> <[1] S. Sarkar,, H. Yen,, and S. Dixit, “Hybrid Wireless-Optical Broadband
Access Network (WOBAN): Network Planning and Setup,” IEEE Journal
on Selected Areas in Communications, vol. 26, no. 6, pp. 12–21, Aug.
2008.
[2] B. N. Cheng,& M. Yuksel, S. Kalyanaraman 2008, “Using Directionality
in Mobile Routing”, 2008 5th IEEE International Conference on Mobile
Ad Hoc and Sensor Systems, Atlanta, GA, Sept. 29 2008-Oct. 2 2008,
IEEE, pp. 371 - 376.
[3] B. N. Cheng,& M. Yuksel, S. Kalyanaraman 2008, “Using Directionality
in Mobile Routing”,2008 5th IEEE International Conference on Mobile Ad
Hoc and Sensor Systems,Atlanta, GA,Sept. 29 2008-Oct. 2
2008,IEEE,pp.371 - 376.
[4] R. Duan,& G. Ma 2014, “Adjusted KNN model in estimating user density
in small areas with poor signal strength”,2014 23rd Wireless and Optical
Communication Conference (WOCC),Newark, NJ,9-10 May
2014,IEEE,pp.1 - 5.
[5] F. Gfeller, W. Hirt& M. de Lange ,B. Weiss 1996, “Wireless Infrared
Transmission: How to Reach All Office Space”,Vehicular Technology
Conference, 1996. Mobile Technology for the Human Race., IEEE
46th,Newark, Atlanta, GA, 28 Apr-1 May 1996,IEEE,pp.1535 - 1539.
[6] R. B. Nunes, A. Shahpari, J. A. L . Silva ,M. Lima ,P. S. de B. Andr´e,M.
E. V. Segatto ,“Experimental Demonstration of a 33.5 Gb/s OFDM based
PON with Subcarrier Pre-emphasis,” Journal of Photonics Letters, vol. 00,
no. 00, January 2016.
[7] J. M. Kahn & D. J. F. Barros,S. Kate Wilson 2012, “Multi-Carrier vs.
Single-Carrier Intensity Modulation Techniques for Indoor Optical
Wireless Links”,2012 IEEE Photonics Society Summer Topical Meeting
Series ,Seattle, WA, 9-11 July 2012,pp.94 - 95.
[8] Q. Wang, Z. Wang,and L. Dai “Iterative Receiver for Hybrid
Asymmetrically Clipped Optical OFDM,” J. of Lightwave Technology,
vol.32, no.22, pp.4471, 4477, NOVEMBER, 2014.

; -webkit-text-stroke-width: 0px; "> [9] W. Xu, M.Wu, X. You, and C. Zhao, “ACO-OFDM-Specified Recoverable
Upper Clipping With Efficient Detection for Optical Wireless
Communications “,IEEE Photonics Journal, VOL. 6, NO. 5, OCTOBER
2014.
[10] J. Lowery, "Enhanced Asymmetrically-Clipped Optical OFDM," ElectroPhotonics Laboratory, Department of Electrical and Computer Systems
Engineering, Monash University, VIC 3800, Australia.
[11] Ming Jiang, "Direct Current Bias Optimization of the LDPC Coded DCOOFDM Systems", IEEE PHOTONICS TECHNOLOGY LETTERS, VOL.
27, NO. 19, OCTOBER 1, 2015.
[12] N. Wu, and Y. Bar-Ness, "A novel power-efficient scheme for
asymmetrically and symetrically clipping optical (ASCOC)-OFDM for
IM/DD optical systems," EURASIP J. Advances Sig. Proc. 2015, 1-10
(2015).
[13] S.D.Dissanayake and J.Armstrong, “Comparison of ACO-OFDM,DCOOFDMand ADO-OFDM in IM/DD systems,” J. Lightw. Technol., vol.
31,no. 7, pp. 1063–1072, Apr. 2013.
[14] J. Armstrong and B. J. C. Schmidt, “Comparison of asymmetrically clipped
optical OFDM and DC-biased optical OFDM in AWGN,” IEEE Commun.
Lett., vol. 12, no. 5, pp. 343–345, May 2008.
[15] S.D. Dissanayake, K. Panta and J. Armstrong,“A Novel technique to
simultaneously transmit ACO-OFDM and DCO-OFDM in IM/DD
systems”, in Proceedings IEEE GLOBECOM 2011 OWC workshop,
Texas, USA, Dec. 5-9, 2011.
[16] J B Carruthers and J M Kahn, Modeling of nondirected wireless Infrared
channels, IEEE Transaction on Communication, 45, 1260–1268, 1997
[17] Goel, Ashish, and M. K. Garg."Comparative Performance Evaluation of
Convolutionally Coded and LDPC Coded OFDM System over AWGN and
SUI-5 Fading Channel", Third International Conference on Computer and
Communication Technology, 2012.
[18] Berrou C, Glavieux A. "Near optimum error correcting coding and
decoding: turbo-codes", IEEE. Transactions on Communications, vo1.44,
no. 10, Oct. 1996, pp.l261-71. Publisher: IEEE, USA.
[19] I. Chatzigeorgiou, M. Rodrigues, I. Wassell, and R. Carrasco, “Can
punctured rate-1/2 turbo codes achieve a lower error floor than their rate-
1/3 parent codes?” in Information Theory Workshop, 2006. ITW ’06
Chengdu. IEEE, Oct 2006, pp. 91–95.
[20] J. Hagenauer, “Source-controlled channel decoding,” IEEE Trans.
Commun.,vol. 43, no. 9, pp. 2449–2457, 1995.