TY - JOUR
T1 - Nonlinear System Identification Scheme for Efficient Compensators Design
AU - Faig, Hananel
AU - Pedersen, Bjarke Vad
AU - Cohen, Shai
AU - Gantz, Liron
AU - Sadot, Dan
N1 - Funding Information:
Manuscript received August 7, 2019; revised October 15, 2019; accepted December 18, 2019. Date of publication December 31, 2019; date of current version July 14, 2020. This work was supported by Peta–Cloud consortium and Mellanox Technologies Ltd. (Corresponding author: Hananel Faig.) H. Faig is with Mellanox Technologies Ltd., Sunnyvale, CA, USA, and also with the Department of Electrical and Computer Engineering, Ben Gurion University of the Negev, Be’er Sheva, Israel (e-mail: faig@post.bgu.ac.il).
Publisher Copyright:
© 1983-2012 IEEE.
PY - 2020/7/1
Y1 - 2020/7/1
N2 - Opto-electronic transmitters such as vertical-cavity surface-emitting lasers (VCSELs) may include nonlinear dis-tortions combined with memory effect. Using a system model identification scheme based on Volterra series, enables distortions root cause identification and design of efficient compensators to mitigate these effects. Extraction of the memory depth of the linear and nonlinear effects enables low cost and efficient digital pre-distortion (DPD) design, based on the combination of a 'long' linear finite impulse response (FIR) filter and a 'short' look-up-table (LUT) that mitigates the nonlinear distortion part. VCSEL-based lab experiments are performed, which demonstrate an efficient DPD of X-taps FIR followed by a LUT which pre-distorts only the most significant nonlinear terms associated with memory depth of 3.
AB - Opto-electronic transmitters such as vertical-cavity surface-emitting lasers (VCSELs) may include nonlinear dis-tortions combined with memory effect. Using a system model identification scheme based on Volterra series, enables distortions root cause identification and design of efficient compensators to mitigate these effects. Extraction of the memory depth of the linear and nonlinear effects enables low cost and efficient digital pre-distortion (DPD) design, based on the combination of a 'long' linear finite impulse response (FIR) filter and a 'short' look-up-table (LUT) that mitigates the nonlinear distortion part. VCSEL-based lab experiments are performed, which demonstrate an efficient DPD of X-taps FIR followed by a LUT which pre-distorts only the most significant nonlinear terms associated with memory depth of 3.
KW - Digital pre-distortion
KW - nonlinear communication systems
KW - volterra series
UR - http://www.scopus.com/inward/record.url?scp=85088514225&partnerID=8YFLogxK
U2 - 10.1109/JLT.2019.2963252
DO - 10.1109/JLT.2019.2963252
M3 - Article
AN - SCOPUS:85088514225
SN - 0733-8724
VL - 38
SP - 3519
EP - 3525
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 13
M1 - 8946734
ER -