An application of OFDM-IDMA to uplink multiuser visible light communication system

Wireless visible light communication system uses LED illumination for data transmission. It is important for a performance index to evaluate a variation of communication quality with the number of users. Although CDMA (Code Division Multiple Access) is a representative of a conventional multiple access in a wireless communication, the maximum number of users is limited due to the length of the spread code, ISI (Inter-Symbol Interference) and MAI (Multiple Access Interference). To solve these problems, we propose the OFDM-IDMA (Orthogonal Frequency Division Multiplexing - Interleave Division Multiple Access), which has robustness for the above-mentioned problems. Moreover, we can improve the robustness by using multi carrier modulation. Therefore we apply the OFDM-IDMA system to visible light communication system. The simulation result shows that BER performance of an optical OFDM-IDMA with multiuser situation is the approximately same as that of single user.

[1]  Masao Nakagawa,et al.  Fundamental analysis for visible-light communication system using LED lights , 2004, IEEE Transactions on Consumer Electronics.

[2]  Heung-Gyoon Ryu,et al.  High Power Efficiency and Low Nonlinear Distortion for Wireless Visible Light Communication , 2011, 2011 4th IFIP International Conference on New Technologies, Mobility and Security.

[3]  Ieee Staff.  2013 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS) , 2013 .

[4]  Li Ping,et al.  Interleave-division multiple access and chip-by-chip iterative multi-user detection , 2005, IEEE Commun. Mag..

[5]  Zaichen Zhang,et al.  Comparison of optical OFDM-IDMA and optical OFDMA for uplink visible light communications , 2012, 2012 International Conference on Wireless Communications and Signal Processing (WCSP).

[6]  Li Ping,et al.  Interleave division multiple-access , 2006, IEEE Trans. Wirel. Commun..

[7]  Li Ping,et al.  Comparison of orthogonal and non-orthogonal approaches to future wireless cellular systems , 2006 .

[8]  Charlotte Langlais,et al.  OFDM-IDMA versus IDMA with ISI Cancellation for Quasistatic Rayleigh Fading Multipath Channels , 2006 .

[9]  Harald Haas,et al.  Visible light communication using OFDM , 2006, 2nd International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, 2006. TRIDENTCOM 2006..