High-Precision and Low-Complexity Symbol Synchronization Algorithm Based on Dual-Threshold Amplitude Decision for Real-Time IMDD OFDM-PON

Junjie Peng; You Sun; Haoshuo Chen; Tingting Xu; Zhengxuan Li; Qianwu Zhang; Junjie Zhang

doi:10.1109/JPHOT.2019.2896057

IEEE Photonics Journal (Jan 2019)

High-Precision and Low-Complexity Symbol Synchronization Algorithm Based on Dual-Threshold Amplitude Decision for Real-Time IMDD OFDM-PON

Junjie Peng,
You Sun,
Haoshuo Chen,
Tingting Xu,
Zhengxuan Li,
Qianwu Zhang,
Junjie Zhang

Affiliations

Junjie Peng: ORCiD; Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
You Sun: Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
Haoshuo Chen: Nokia Bell Laboratories, Holmdel, NJ, USA
Tingting Xu: ORCiD; Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
Zhengxuan Li: Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
Qianwu Zhang: ORCiD; Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
Junjie Zhang: ORCiD; Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China

DOI: https://doi.org/10.1109/JPHOT.2019.2896057
Journal volume & issue: Vol. 11, no. 1
pp. 1 – 14

Abstract

Read online

We propose a low-complexity and high-precision symbol synchronization algorithm based on dual-threshold amplitude decision for field programmable gate array-based real-time intensity modulation direct detection orthogonal frequency division multiplexing-passive optical network (OFDM-PON) system. In addition, a new criterion to judge symbol synchronization accuracy is proposed first based on bipolar non-return-to-zero codes in time domain. Experimental results show that 95% synchronization precision rate can be achieved after 25 km standard single-mode fiber transmission with the received optical power as low as -21 dBm. Compared with the previously proposed one threshold symbol synchronization algorithm, the synchronization performance has been greatly improved, which brings a maximum signal bit rate gain of 35% when the received optical power is lower than -16 dBm. Furthermore, it is verified that the proposed algorithm is robust. It has wide transmission range which is applicable for OFDM-PON optical access networks within 100 km and has good sampling frequency offset (SFO) tolerance, which can cover the SFO up to 500 ppm without any discard on synchronization precision rate. Finally, complexity analysis shows that our algorithm has the lowest computational complexity and hardware resource consumption, which account for only 0.9% of system resources without any multipliers.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

About the journal

Abstract

Keywords