Low complexity multi-level NB-QC-LDPC coded modulation scheme for optical communication systems

Dongdong Wang; Chenhua Sun; Liqian Wang; Xue Chen; Yantao Guo; Guannan Jia; Yong Li; Yang Wang

doi:10.1117/12.2522090

14 February 2019 Low complexity multi-level NB-QC-LDPC coded modulation scheme for optical communication systems

Dongdong Wang, Chenhua Sun, Liqian Wang, Xue Chen, Yantao Guo, Guannan Jia, Yong Li, Yang Wang

Proceedings Volume 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018); 110481O (2019) https://doi.org/10.1117/12.2522090
Event: 17th International Conference on Optical Communications and Networks (ICOCN2018), 2018, Zhuhai, China

Abstract

In this paper, we propose a multi-level non-binary quasi-cyclic low density parity check (NB-QC-LDPC) coded modulation (CM) scheme to reduce the decoding complexity while maintaining and/or exceeding the super BER performance of the traditional NB-QC-LDPC CM scheme. Firstly, local optimal searching combined with the classical superposition construction is proposed to construct the required NB-QC-LDPC codes with possibly enlarged girth and less number of the shortest cycles. Secondly, by analyzing the changing trend of the BER performance and decoding complexity of the NB-QC-LDPC code defined over 𝐺𝐹(𝑄) incident to 𝑄. We find that the decoding complexity increases proportionally with the increase of 𝑄, but the best BER performance usually corresponds to a smaller 𝑄. Finally, by replacing the high-order NB-QC-LDPC code based CM scheme to the multi-level low-order NB-QC-LDPC code based CM scheme, the decoding complexity can be effectively reduced. Simulation results show that the designed two-level 𝐺𝐹(4)/𝐺𝐹(8) QC-LDPC code based 16QAM/64QAM CM system can perform almost the same or even better BER performance with/than the corresponding traditional 𝐺𝐹(16) / 𝐺𝐹(64) QC-LDPC code based 16QAM/64QAM CM system.

Citation Download Citation

Dongdong Wang, Chenhua Sun, Liqian Wang, Xue Chen, Yantao Guo, Guannan Jia, Yong Li, and Yang Wang "Low complexity multi-level NB-QC-LDPC coded modulation scheme for optical communication systems", Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 110481O (14 February 2019); https://doi.org/10.1117/12.2522090

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available