TY - GEN
T1 - A DCO-OFDM system employing beneficial clipping method
AU - Zhang, Xiaojing
AU - Liu, Peng
AU - Liu, Jiang
AU - Liu, Song
N1 - Publisher Copyright:
© 2015 International Telecommunication Union.
PY - 2016/1/14
Y1 - 2016/1/14
N2 - The existing clipping researches in direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) systems generally originate from insufficient DC bias and the nonlinear transmission characteristics of physical devices which will distort the system performances. In contrast to conventional clipping theories, the beneficial clipping method demonstrated in this paper aims to improve the transmission effects of DCO-OFDM systems. Using the Bussgang theorem, the signal to noise ratio (SNR) and bit error ratio (BER) of DCO-OFDM systems with the beneficial clipping method are modeled mathematically. It is found that the beneficial clipping method can effectively reduce the system BER, compared with the no clipping situation, when the clipping ratio is mapped over an appropriate range. Also, the optimal clipping ratio changes with variation of the modulation depth. These results illustrate that the beneficial clipping method can enhance the performance of DCO-OFDM systems, although it does introduce clipping noise.
AB - The existing clipping researches in direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) systems generally originate from insufficient DC bias and the nonlinear transmission characteristics of physical devices which will distort the system performances. In contrast to conventional clipping theories, the beneficial clipping method demonstrated in this paper aims to improve the transmission effects of DCO-OFDM systems. Using the Bussgang theorem, the signal to noise ratio (SNR) and bit error ratio (BER) of DCO-OFDM systems with the beneficial clipping method are modeled mathematically. It is found that the beneficial clipping method can effectively reduce the system BER, compared with the no clipping situation, when the clipping ratio is mapped over an appropriate range. Also, the optimal clipping ratio changes with variation of the modulation depth. These results illustrate that the beneficial clipping method can enhance the performance of DCO-OFDM systems, although it does introduce clipping noise.
KW - Visible light communication
KW - clipping
KW - light emitting diode
KW - nonlinear distortion
KW - orthogonal frequency division multiplexing
UR - http://www.scopus.com/inward/record.url?scp=84963650479&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84963650479&partnerID=8YFLogxK
U2 - 10.1109/Kaleidoscope.2015.7383638
DO - 10.1109/Kaleidoscope.2015.7383638
M3 - Conference contribution
AN - SCOPUS:84963650479
T3 - Proceedings of the 2015 ITU Kaleidoscope: Trust in the Information Society, K-2015 - Academic Conference
BT - Proceedings of the 2015 ITU Kaleidoscope
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 7th ITU Kaleidoscope: Trust in the Information Society, K-2015
Y2 - 9 December 2015 through 11 December 2015
ER -