Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Reduced Complexity Equalization for Coherent Long-Reach Passive Optical Networks [Invited]

Not Accessible

Your library or personal account may give you access

Abstract

Coherent receivers offer a potential solution for implementing a high-capacity, long-reach (up to 100 km) passive optical network (LR-PON), due mainly to their high sensitivity, frequency selectivity, and bandwidth efficiency. When using coherent receivers, received signals can be post-processed digitally to mitigate the specific impairments found in access networks and, additionally, relax the optical complexity requirements of the coherent receiver. However, the digital signal processing must itself be low complexity in order to minimize the overall complexity and power consumption of the optical network unit (ONU). This paper focuses on the impact of reduced complexity equalization algorithms on receiver sensitivity in a LR-PON. It is found that a cascade of linear filters can be combined into a single, truncated, linear, adaptive filter with negligible impact on receiver sensitivity. Additionally, by utilizing a multiplier-free tap weight update algorithm, the overall complexity of a digital coherent receiver can be significantly reduced, making it attractive for use in an ONU. Matched filtering, chromatic dispersion compensation, and polarization tracking are all performed by the adaptive equalizer. The performance of this low-complexity, multiplier-free equalizer is experimentally verified for 3 GBd polarization division multiplexed quadrature phase shift keying (12Gbit/s) in both a back-to-back configuration and transmission over 100 km standard single-mode fiber.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Non-integer-oversampling digital signal processing for coherent passive optical networks

Haide Wang, Ji Zhou, Jinyang Yang, Jianrui Zeng, Weiping Liu, Changyuan Yu, Fan Li, and Zhaohui Li
J. Opt. Commun. Netw. 16(1) 4-11 (2024)

Burst-Mode Digital Signal Processing That Pre-Calculates FIR Filter Coefficients for Digital Coherent PON Upstream

Ryo Koma, Masamichi Fujiwara, Jun-Ichi Kani, Ken-Ichi Suzuki, and Akihiro Otaka
J. Opt. Commun. Netw. 10(5) 461-470 (2018)

PoT quantization and rotational update mechanism for optimizing equalization in passive optical networks

Bohan Sang, Yikai Wang, Jiaxuan Liu, Long Zhang, Kaihui Wang, Luhan Jiang, Jingtao Ge, Li Zhao, Wen Zhou, and Jianjun Yu
J. Opt. Commun. Netw. 16(3) 392-403 (2024)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (10)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved