OFDM visible light wireless communication based on white LEDs

被引：143
|
作者：
Elgala, H. [1 ]
Mesleh, R. [1 ]
Haas, H. [1 ]
Pricope, B. [1 ]
机构：
[1] Int Jacobs Univ Bremen, Sch Engn & Sci, D-28759 Bremen, Germany
来源：
2007 IEEE 65TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 | 2007年
关键词：
D O I：
10.1109/VETECS.2007.451
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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 will be shown that for COFDM (coded OFDM) with QPSK (quadrature phase shift keying) modulation and a single LED, a BER of 2 x 10(-5) is achieved for a distance of 90cm between transmitter and receiver.
引用
收藏
页码：2185 / 2189
页数：5
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