Advanced A-law employing nonlinear distortion reduction in DCO-OFDM systems

Xiaojing Zhang, Peng Liu*, Jiang Liu, Song Liu

*この研究の対応する著者

研究成果: Conference contribution

5 被引用数 (Scopus)

抄録

In this paper, an advanced A-law nonlinear companding algorithm is employed to reduce the nonlinear distortions from the light emitting diode (LED) on visible light communication (VLC) systems. The nonlinear transfer characteristics of LEDs are not identical. But the transfer effect of an LED can be modeled as a linear transfer range with the maximum and minimum forward voltages. Therefore, the signal will be truncated when the signal amplitude is larger than the maximum limit or smaller than the minimum limit. The advanced A-law companding algorithm can concentrate the signal amplitude to the limited linear transfer range and decrease the truncation distortion. We evaluate the performance of the proposed advanced A-law companding algorithm comparing with typical A-law and uncompanded schemes via simulations in the direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) system. Experimental results demonstrate that the advanced A-law companding algorithm can effectively alleviate the nonlinear distortion of the DCO-OFDM system in terms of system bit error ratio (BER) performances.

本文言語English
ホスト出版物のタイトル2015 IEEE/CIC International Conference on Communications in China - Workshops, CIC/ICCC 2015
出版社Institute of Electrical and Electronics Engineers Inc.
ページ184-188
ページ数5
ISBN(電子版)9781467397018
DOI
出版ステータスPublished - 2017 6月 28
イベント2015 IEEE/CIC International Conference on Communications in China - Workshops, CIC/ICCC 2015 - Shenzhen, China
継続期間: 2015 11月 22015 11月 4

出版物シリーズ

名前2015 IEEE/CIC International Conference on Communications in China - Workshops, CIC/ICCC 2015

Other

Other2015 IEEE/CIC International Conference on Communications in China - Workshops, CIC/ICCC 2015
国/地域China
CityShenzhen
Period15/11/215/11/4

ASJC Scopus subject areas

  • コンピュータ ネットワークおよび通信
  • ハードウェアとアーキテクチャ
  • 信号処理

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