Signal-to-Noise Ratio Improvement for Phase-Sensitive Optical Time-Domain Reflectometry Using a Genetic Least Mean Square Method

IF 2.1 4区物理与天体物理 Q2 OPTICS

Photonics Pub Date : 2023-12-09 DOI:10.3390/photonics10121362

Xin Liu, Zhihua Liu, Xiaoxu Zhou, Yu Wang, Qing Bai, Bao-quan Jin

引用次数: 0

Abstract

In this paper, a genetic least mean square (GLMS) method is proposed to improve the signal-to-noise ratio (SNR) of acoustic signal reconstruction in a phase-sensitive optical time-domain reflectometry system. The raw demodulated signal is processed via applying the least mean square criterion. The SNR of the processed signal was calculated and served as the objective function in the fitness evaluation procedure. The genetic operations of the population selection, crossover, and mutation are sequentially performed and repeated until the suspensive condition is reached. Through multiple iterations, the GLMS method continuously optimized the population to find the optimal solution. Experimental results demonstrate that the SNR is substantially improved by 14.37–23.60 dB in the monotonic scale audio signal test from 60 to 1000 Hz. Furthermore, the improvement of the phase reconstruction of a human voice audio signal is also validated by exploiting the proposed GLMS method.

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利用遗传最小均方法提高相位敏感光学时域反射测量法的信噪比

本文提出了一种遗传最小均方（GLMS）方法，用于提高相敏光学时域反射测量系统中声学信号重建的信噪比（SNR）。原始解调信号通过最小均方准则进行处理。处理后信号的信噪比被计算出来，并作为适合度评估程序中的目标函数。种群选择、交叉和变异等遗传操作依次重复进行，直到达到中止条件。通过多次迭代，GLMS 方法不断优化种群，以找到最优解。实验结果表明，在 60 至 1000 Hz 的单调音阶音频信号测试中，信噪比大幅提高了 14.37-23.60 dB。此外，利用提出的 GLMS 方法还验证了人声音频信号相位重建的改进。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Photonics Physics and Astronomy-Instrumentation

CiteScore

2.60

自引率

20.80%

发文量

817

审稿时长

8 weeks

期刊介绍： Photonics (ISSN 2304-6732) aims at a fast turn around time for peer-reviewing manuscripts and producing accepted articles. The online-only and open access nature of the journal will allow for a speedy and wide circulation of your research as well as review articles. We aim at establishing Photonics as a leading venue for publishing high impact fundamental research but also applications of optics and photonics. The journal particularly welcomes both theoretical (simulation) and experimental research. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material.