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Due to the narrow beamwidths of laser Gaussian beams, accurate tracking of laser beam's angle-of-arrival is an important problem in mobile free-space optical communications. In most optical receivers today, fine tracking of angle-of-arrival…

信号处理 · 电气工程与系统科学 2023-08-01 Ming-Cheng Tsai , Muhammad Salman Bashir , Mohamed-Slim Alouini

The estimation of direction of arrival (DOA) is a crucial issue in conventional radar, wireless communication, and integrated sensing and communication (ISAC) systems. However, low-cost systems often suffer from imperfect factors, such as…

信号处理 · 电气工程与系统科学 2024-03-21 Peng Chen , Zhimin Chen , Liang Liu , Yun Chen , Xianbin Wang

Many multi-sensor navigation systems urgently demand accurate positioning initialization from global navigation satellite systems (GNSSs) in challenging static scenarios. However, ground blockages against line-of-sight (LOS) signal…

信号处理 · 电气工程与系统科学 2023-01-03 Yiran Luo , Li-Ta Hsu , Yang Jiang , Baoyu Liu , Zhetao Zhang , Yan Xiang , Naser El-Sheimy

In this article, we present a simple technique for boosting the order of accuracy of finite difference schemes for time dependent partial differential equations by optimally selecting the time step used to advance the numerical solution and…

数值分析 · 数学 2009-05-26 Kevin T. Chu

Sixth generation (6G) cellular communications are expected to support enhanced wireless localization capabilities. The widespread deployment of large arrays and high-frequency bandwidths give rise to new considerations for localization…

信号处理 · 电气工程与系统科学 2022-10-31 Qianyu Yang , Anna Guerra , Francesco Guidi , Nir Shlezinger , Haiyang Zhang , Davide Dardari , Baoyun Wang , Yonina C. Eldar

The quick detection and localization of partial discharge (PD) in an air-insulated substation (AIS) based on ultrahigh-frequency (UHF) sensor arrays are efficient for power equipment monitoring. The adopted UHF PD time difference of arrival…

信号处理 · 电气工程与系统科学 2020-10-19 Bei Han , Lingen Luo , Gehao Sheng , Xiuchen Jiang

Adapting Deep Learning (DL) techniques to automate non-trivial coding activities, such as code documentation and defect detection, has been intensively studied recently. Learning to predict code changes is one of the popular and essential…

软件工程 · 计算机科学 2022-08-02 Shiyi Qi , Yaoxian Li , Cuiyun Gao , Xiaohong Su , Shuzheng Gao , Zibin Zheng , Chuanyi Liu

With the rise of critical machine-to-machine applications, next generation wireless communication systems must be designed with strict constraints on the latency and reliability. A key question in this context relates to channel state…

信息论 · 计算机科学 2017-06-06 Sebastian Schiessl , Hussein Al-Zubaidy , Mikael Skoglund , James Gross

High-quality radio frequency (RF) components are imperative for efficient wireless communication. However, these components can degrade over time and need to be identified so that either they can be replaced or their effects can be…

信号处理 · 电气工程与系统科学 2022-07-06 Mehmet Ali Aygul , Ebubekir Memisoglu , Hakan Ali Cirpan , Huseyin Arslan

The capability to achieve high-precision positioning accuracy has been considered as one of the most critical requirements for vehicle-to-everything (V2X) services in the fifth-generation (5G) cellular networks. The non-line-of-sight (NLOS)…

信号处理 · 电气工程与系统科学 2021-02-23 Abdurrahman Fouda , Ryan Keating , Amitava Ghosh

In this letter, we investigate the direction-of-arrival (DOA) estimation problem for wireless sensing with movable antenna (MA) systems in the presence of unknown antenna position errors (APE). To achieve robust wireless sensing, we…

信号处理 · 电气工程与系统科学 2026-05-25 Chengzhi Ye , Ruoyu Zhang , Wen Wu , Byonghyo Shim

In the context of joint communication and sensing JC&S, the challenge of obtaining accurate parameter estimates is of interest. Parameter estimates, such as the AoA can be utilized for solving the initial access problem, interference…

信号处理 · 电气工程与系统科学 2026-01-08 Carl Collmann , Ahmad Nimr , Gerhard Fettweis

A simple modification method for single-stage generic object detection neural networks, such as YOLO and SSD, is proposed, which allows for improving the detection accuracy on video data by exploiting the temporal behavior of the scene in…

计算机视觉与模式识别 · 计算机科学 2020-09-04 Menua Gevorgyan

In a time-of-arrival (TOA) or pseudorange based positioning system, user location is obtained by observing multiple anchor nodes (AN) at known positions. Utilizing more than one positioning systems, e.g., combining Global Positioning System…

信号处理 · 电气工程与系统科学 2020-11-26 Sihao Zhao , Xiao-Ping Zhang , Xiaowei Cui , Mingquan Lu

In a time-division broadcast positioning system (TDBPS), localizing mobile targets using classical time difference of arrival (TDOA) methods poses significant challenges. Concurrent TDOA measurements are infeasible because targets receive…

信号处理 · 电气工程与系统科学 2025-11-11 Chenxin Tu , Xiaowei Cui , Gang Liu , Sihao Zhao , Mingquan Lu

Deep Neural Networks (DNNs) are a promising tool for Global Navigation Satellite System (GNSS) positioning in the presence of multipath and non-line-of-sight errors, owing to their ability to model complex errors using data. However,…

机器人学 · 计算机科学 2022-06-23 Ashwin V. Kanhere , Shubh Gupta , Akshay Shetty , Grace Gao

Recently, deep learning-based positioning systems have gained attention due to their higher performance relative to traditional methods. However, obtaining the expected performance of deep learning-based systems requires large amounts of…

信号处理 · 电气工程与系统科学 2019-06-20 Hamada Rizk , Ahmed Shokry , Moustafa Youssef

Pixel detectors only record signals above a tuned threshold in order to suppress noise. As sensors become thinner, pitches decrease, and radiation damage reduces the collected charge, it is increasingly desirable to lower thresholds. By…

仪器与探测器 · 物理学 2019-10-02 Benjamin Nachman , Alex Spies

A novel approach is suggested for improving the accuracy of fault detection in distribution networks. This technique combines adaptive probability learning and waveform decomposition to optimize the similarity of features. Its objective is…

信号处理 · 电气工程与系统科学 2023-10-03 Xinliang Ma , Weihua Liu , Bingying Jin

Precision pulsar timing requires optimization against measurement errors and astrophysical variance from the neutron stars themselves and the interstellar medium. We investigate optimization of arrival time precision as a function of radio…

高能天体物理现象 · 物理学 2018-06-28 M. T. Lam , M. A. McLaughlin , J. M. Cordes , S. Chatterjee , T. J. W. Lazio