A novel signal detection method for photon-counting communications with nonlinear distortion effects

IF 2.2 3区 物理与天体物理 Q2 OPTICS Optics Communications Pub Date : 2024-10-28 DOI:10.1016/j.optcom.2024.131237
Chen Wang , Zhiyong Xu , Jingyuan Wang , Jianhua Li , Weifeng Mou , Huatao Zhu , Jiyong Zhao , Yang Su , Yimin Wang , Ailin Qi
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Abstract

This paper proposes a method for estimating and detecting optical signals in practical photon-counting receivers. There are two important aspects of non-perfect photon-counting receivers, namely, (i) dead time which results in blocking loss, and (ii) non-photon-number-resolving, which leads to counting loss during the gate-ON interval. These factors introduce nonlinear distortion to the detected photon counts. The detected photon counts depend not only on the optical intensity but also on the signal waveform, and obey a Poisson binomial process. Using the discrete Fourier transform characteristic function (DFT-CF) method, we derive the probability mass function (PMF) of the detected photon counts. Furthermore, unlike conventional methods that assume an ideal rectangle wave, we propose a novel signal estimation and decision method applicable to arbitrary waveform. We demonstrate that the proposed method achieves superior error performance compared to conventional methods. The proposed algorithm has the potential to become an essential signal processing tool for photon-counting receivers.
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具有非线性失真效应的新型光子计数通信信号检测方法
本文提出了一种在实用光子计数接收器中估算和检测光信号的方法。非完美光子计数接收器有两个重要方面,即:(i) 死区时间导致阻塞损耗;(ii) 非光子数分辨导致门-开间隔期间的计数损耗。这些因素给检测到的光子计数带来了非线性失真。检测到的光子计数不仅取决于光强度,还取决于信号波形,并服从泊松二项过程。利用离散傅里叶变换特征函数(DFT-CF)方法,我们得出了检测到的光子计数的概率质量函数(PMF)。此外,与假设理想矩形波的传统方法不同,我们提出了一种适用于任意波形的新型信号估计和决策方法。我们证明,与传统方法相比,所提出的方法具有更优越的误差性能。所提出的算法有望成为光子计数接收器的重要信号处理工具。
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来源期刊
Optics Communications
Optics Communications 物理-光学
CiteScore
5.10
自引率
8.30%
发文量
681
审稿时长
38 days
期刊介绍: Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.
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