Abstract

In this Letter, we propose the application of a Volterra predistorter to compensate for the second-order nonlinear distortion generated in light-emitting diode (LED) communication systems. We demonstrate that a predistorter dedicated specifically to the LED has linear (not quadratic) numerical processing complexity. Experimental investigation performed using pulse amplitude modulation (PAM-4) indicates that it achieves similar performance as the classical Volterra equalizer located at the receiver. The highest measured gain in electrical signal to noise and interference power ratio of predistortion over linear equalization was at 300 Mbaud and was approximately 3.5 dB. At the same baud rate, the unpredistorted signal had a received optical power penalty of up to 2.5 dBm compared with the predistorted signal.

© 2022 Optica Publishing Group

LED communications with linear complexity compensation of dynamic nonlinear distortion

Grzegorz Stepniak
Appl. Opt. 61(31) 9271-9278 (2022)

Low-complexity Volterra-inspired neural network equalizer in 100-G band-limited IMDD PON system

Luyao Huang, Wenqing Jiang, Yongxing Xu, Weisheng Hu, and Lilin Yi
Opt. Lett. 47(21) 5692-5695 (2022)

LED nonlinearity mitigation in LACO-OFDM optical communications based on adaptive predistortion and postdistortion techniques

Mohammed Abd Elkarim, Moustafa H. Aly, Hala M. AbdelKader, and M. M. Elsherbini
Appl. Opt. 60(24) 7279-7289 (2021)

Net 4 Gb/s underwater optical wireless communication system over 2 m using a single-pixel GaN-based blue mini-LED and linear equalization

Xueyang Li, Chen Cheng, Chao Zhang, Zixian Wei, Lai Wang, H. Y. Fu, and Yanfu Yang
Opt. Lett. 47(8) 1976-1979 (2022)

V-band gapless OFDM RoF system with power detector down-conversion and novel Volterra nonlinear filtering

Chun-Ting Lin, Shou-Chih Chiang, Che-Hao Li, Hou-Tzu Huang, Chi-Hsiang Lin, and Bo-Jiun Lin
Opt. Lett. 42(2) 207-210 (2017)