R&D: Phase-Distribution-Aware Adaptive Decision Scheme to Improve Reliability of Holographic Storage
Experimental results show that when compared to traditional decision scheme, PDAA decision scheme can reduce phase error of data pages, improving data reliability of holographic storage.
This is a Press Release edited by StorageNewsletter.com on July 14, 2022 at 2:00 pmOptics Express has published an article written by Yahui Zhao, Fei Wu, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China, Xiao Lin, College of Photonic and Electronic Engineering, Fujian Normal University, Minhou District, Fuzhou 350117, China, Meng Zhang, Qin Yu, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China, Xiaodi Tan, College of Photonic and Electronic Engineering, Fujian Normal University, Minhou District, Fuzhou 350117, China, and Changsheng Xie, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China.
Abstract: “Owing to their high storage density and long storage life, holographic data storage (HDS) technologies are viable options for mass cold data storage in the era of big data. Phase-modulated holographic data storage (PHDS) is a promising implementation of HDS. However, because of complex noise in the storage channel, many errors remain after phase demodulation. This study investigates the phase decision in the data-reading stage of PHDS. We propose a phase-distribution-aware adaptive (PDAA) decision scheme to address the inaccurate thresholds in traditional phase decision schemes. The PDAA decision scheme can determine more accurate decision thresholds based on the phase distribution characteristics of each reconstructed phase data page and adaptively match different decision thresholds to each phase data page. The experimental results show that when compared to the traditional decision scheme, the PDAA decision scheme can significantly reduce the phase error of data pages, improving the data reliability of holographic storage.“
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