Experimental comparisons of optical OFDM approaches in visible light communications

This paper presents an experimental comparison of optical orthogonal frequency division multiplexing (OFDM) approaches in visible light communications (VLC). We demonstrate that OFDM schemes with asymmetric signals suffer from baseline wander in practical transmission experiments, which degrades the overall bit-rate performance. Several schemes that combat this effect are reported and the performances of these schemes are measured. However, it is demonstrated that a DCO-OFDM scheme achieves higher bitrate at target BER in a VLC system that is bandwidth-limited.

[1]  D. O'Brien,et al.  A Gigabit/s Indoor Wireless Transmission Using MIMO-OFDM Visible-Light Communications , 2013, IEEE Photonics Technology Letters.

[2]  D. O’brien,et al.  100-Mb/s NRZ Visible Light Communications Using a Postequalized White LED , 2009, IEEE Photonics Technology Letters.

[3]  Steve Hranilovic,et al.  Receiver design for asymmetrically clipped optical OFDM , 2011, 2011 IEEE GLOBECOM Workshops (GC Wkshps).

[4]  Harald Haas,et al.  Novel Unipolar Orthogonal Frequency Division Multiplexing (U-OFDM) for Optical Wireless , 2012, 2012 IEEE 75th Vehicular Technology Conference (VTC Spring).

[5]  J. Armstrong,et al.  OFDM for Optical Communications , 2009, Journal of Lightwave Technology.

[6]  Jean Armstrong,et al.  Digital Modulation Techniques for Optical Asymmetrically-Clipped OFDM , 2008, 2008 IEEE Wireless Communications and Networking Conference.

[7]  G. Cossu,et al.  1-Gb/s Transmission Over a Phosphorescent White LED by Using Rate-Adaptive Discrete Multitone Modulation , 2012, IEEE Photonics Journal.

[8]  Grahame Faulkner,et al.  Cellular tracked optical wireless demonstration link , 2003 .

[9]  S. Randel,et al.  Broadband Information Broadcasting Using LED-Based Interior Lighting , 2008, Journal of Lightwave Technology.

[10]  K. Langer,et al.  513 Mbit/s Visible Light Communications Link Based on DMT-Modulation of a White LED , 2010, Journal of Lightwave Technology.

[11]  K. Langer,et al.  White Light Wireless Transmission at 200${+}$ Mb/s Net Data Rate by Use of Discrete-Multitone Modulation , 2009, IEEE Photonics Technology Letters.

[12]  R.A. Shafik,et al.  On the Extended Relationships Among EVM, BER and SNR as Performance Metrics , 2006, 2006 International Conference on Electrical and Computer Engineering.