Wavelength Division-adaptive Interference Cancellation Applied in OFDM Visible Light Communication Systems

Abstract

This paper studies the performance degradation caused by optical Doppler shift in light-emitting diode-based visible light communication systems, which integrate orthogonal frequency division multiplexing (OFDM). Through theoretical analysis and computer simulations, we can observe that frequency offset plays a significant role in the OFDM performance deterioration due to inter-carrier interference (ICI) and common phase error (CPE). Therefore, a scheme to correct the frequency offset by using wavelength division-adaptive interference cancellation (WD-AIC) was proposed. The main approach is to assign an estimated sub-carrier after every two adjacent sub-carriers to reduce the negative effects of both ICI and CPE. Finally, the simulation results declare that our proposed WD-AIC is indeed effective against the high degree of frequency offset.

Keywords:

• CPE
• Doppler shift
• Frequency offset
• Inter-carrier interference
• Orthogonal frequency division multiplexing

Additional information

Notes on contributors

Ying Yi

Ying Yi received the B.S degree in Information Technology from HeBei Normal University, in HeBei Province, China, and M.Eng. degrees from the Department of Electronics and Radio Engineering, Kyung Hee University, Korea, in 2008 and 2010, respectively. Currently, he is a research associate with Department of Electronics and Radio Engineering, Kyung Hee University, Korea. Meanwhile, he is doing the projects for IT Research and Development Program of the Korean Ministry of Knowledge Economy and Korea Evaluation Institute of Industrial Technology (MKE/KEIT) as a researcher. His research interests are optical wireless communication systems, Ad-hoc/Mesh network, and LTE. E-mail: [email protected]

Changping Li

Changping Li received the B.Eng degree in Biomedical engineering from Jiamusi University, Hei Longjiang province, China, in 2008. She is currently pursuing the Ph.D. degree at Department of Electronics and Radio Engineering, Kyung Hee University, Korea. Her current research interests include: Diversity technology, Optical wireless communication, OFDM and MC-CDMA. E-mail: [email protected]

Kyesan Lee

Kyesan Lee received a B.E. degree in electrical engineering from Kyung Hee University in Korea and M.S. and Ph.D. degrees from the department of electrical engineering, Keio University, Yokohama, Japan, in 1996, 1999, and 2002, respectively. He joined KDDI R&D Laboratories Inc in 2002 and has received a IEEE VTS Japan young researchers encouragement award. Since 2003, he has been with the College of Electronic and Information, Kyung Hee University, where he is a Professor. He received the excellent paper award in 2009 IEEE ISCIT (International symposium on communication and information technology). He has received the Prime minister award 2009. He received also the minister award of ministry of education science and technology in 2009. His research interests include wireless communication networks, CDMA, OFDM, MC-CDMA, MC-DS/CDMA, MIMO, and Cognitive radio and Visible light communication systems. E-mail: [email protected]