Linearization of LED Nonlinearity by Predistortions

Asatani, Koichi; Kimura, Tomohiro

doi:10.1109/jssc.1978.1051007

Cited by 21 publications

(2 citation statements)

References 8 publications

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“…The first category is to linearize the nonlinear transmission characteristics of LEDs by methods such as pre-distortion or postdistortion. The pre-distortion method in [6,7] compensates the nonlinearity of LEDs by designing physical analogue circuits. However, the pre-distortion method is difficult to be widely used because the transmitter requires additional feedback physical circuits.…”

Section: Introductionmentioning

confidence: 99%

An Adaptive Iterative Symbol Clipping Scheme for OFDM-Based Visible Light Communication

Jia

Qin²,

Yang³

et al. 2022

Wireless Pers Commun

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In this paper, an adaptive iterative symbol clipping scheme for OFDMbased visible light communication systems is proposed. This scheme can avoid the disadvantages of the conventional iterative signal clipping (ISC) scheme that produces all-zero symbols due to the fixed iterative clipping times, and also avoids the information transmission rate degradation due to an adaptive symbol decomposition with serial transmission (ASDST) scheme using serial transmission. In the proposal, optical orthogonal frequency division multiplexing (O-OFDM) symbols are decomposed into multiple O-OFDM symbols that are in the linear range of the LEDs after adaptive iterative clipping according to the signal amplitude and clipping threshold, thereafter simultaneously transmitted through multiple LEDs. When the number of LEDs is large enough, clipping distortion can be significantly reduced or even completely eliminated. In addition, the all-zero symbols existing in the ISC scheme can be completely eliminated. Experimental results show that the proposed scheme can not only improve the BER performance and the optical power efficiency, but also reduce the clipping times compared with

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Section: Introductionmentioning

confidence: 99%

An Adaptive Iterative Symbol Clipping Scheme for OFDM-Based Visible Light Communication

Jia

Qin²,

Yang³

et al. 2022

Wireless Pers Commun

View full text Add to dashboard Cite

show abstract

“…For example, the CATV application requires a carrier to distortion ratio better than 50dB; GSM pico-cellular and micro-cellular requires a satisfactory dynamic range of 40-55dB and 80-90dB respectively [3,4]. A variety of linearization techniques for semiconductor lasers have been introduced and can be classified as: optoelectronic feedback and optical feed-forward [5][6][7][8][9][10]44,45], phase shift linearization [46], external light injection [47][48][49], post-distortion [11][12][13]50,51] and pre-distortion [14][15][16][17][18][19]25,35,52,53].…”

Section: Review Of Laser Linearization Techniquesmentioning

confidence: 99%