OFDM Visible Light Wireless Communication Based on White LEDs
Top Cited Papers
- 1 April 2007
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- No. 15502252,p. 2185-2189
- https://doi.org/10.1109/vetecs.2007.451
Abstract
White LEDs are set to penetrate many areas of everyday life. An interesting property of these devices (in addition to their lightening capabilities) is that they can be utilised for data transmission. In the past, primarily OOK (on-off keying) has been used for digital data modulation of such devices. OOK imposes limitations on the achievable data rates. Therefore, in this paper OFDM is considered in combination with higher order modulation schemes. A hardware demonstrator with an entire link chain (transmitter and receiver) is developed and measured BER (bit error ratio) results are reported. The system uses pilot sub-carriers to correct frequency synchronisation errors, training sequences for channel estimation and time synchronisation routines. Forward error correction (FEC) coding is used. It is shown that for COFDM (coded OFDM) with QPSK (quadrature phase shift keying) modulation and a single LED, a BER of 2 times 10-5 is achieved for a distance of 90 cm between transmitter and receiver.Keywords
This publication has 10 references indexed in Scilit:
- Fundamental analysis for visible-light communication system using LED lightsIEEE Transactions on Consumer Electronics, 2004
- Modulation analysis for wireless infrared communicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Indoor visible communication utilizing plural white LEDs as lightingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Present performance of InGaN-based blue/green/yellow LEDsPublished by SPIE-Intl Soc Optical Eng ,1997
- Wireless infrared communicationsProceedings of the IEEE, 1997
- Multiple-subcarrier modulation for nondirected wireless infrared communicationIEEE Journal on Selected Areas in Communications, 1996
- Modulation methods for wireless infrared transmission systems: performance under ambient light noise and interferencePublished by SPIE-Intl Soc Optical Eng ,1995
- Performance evaluation of baseband OOK for wireless indoor infrared LAN's operating at 100 Mb/sIEEE Transactions on Communications, 1995
- COFDM: an overviewIEEE Transactions on Broadcasting, 1995
- Non-directed infrared links for high-capacity wireless LANsIEEE Wireless Communications, 1994