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We consider outdoor optical access points (OAPs), which, enabled by recent advances in metasurface technology, have attracted growing interest. While OAPs promise high data rates and strong physical-layer security, practical deployments…

Signal Processing · Electrical Eng. & Systems 2025-12-23 Meysam Ghanbari , Mohammad Taghi Dabiri , Rula Ammuri , Mazen Hasna , Khalid Qaraqe

Large-scale MIMO systems are well known for their advantages in communications, but they also have the potential for providing very accurate localization thanks to their high angular resolution. A difficult problem arising indoors and…

Information Theory · Computer Science 2017-02-13 Nil Garcia , Henk Wymeersch , Erik G. Larsson , Alexander M. Haimovich , Martial Coulon

In object detection, offset-guided and point-guided regression dominate anchor-based and anchor-free method separately. Recently, point-guided approach is introduced to anchor-based method. However, we observe points predicted by this way…

Computer Vision and Pattern Recognition · Computer Science 2020-11-05 Bin Zhu , Qing Song , Lu Yang , Zhihui Wang , Chun Liu , Mengjie Hu

The vast amount of spectrum available for millimeter wave (mmWave) wireless communication systems will support accurate real-time positioning concurrent with communication signaling. This paper demonstrates that accurate estimates of the…

Information Theory · Computer Science 2018-08-23 Ojas Kanhere , Theodore S. Rappaport

Hybrid received signal strength (RSS)-angle of arrival (AoA)-based positioning offers low-cost distance estimation and high-resolution angular measurements. Still, it comes at a cost of inherent nonlinearities, geometry-dependent noise, and…

Signal Processing · Electrical Eng. & Systems 2026-02-19 Omid Abbassi Aghda , Slavisa Tomic , Oussama Ben Haj Belkacem , Joao Guerreiro , Nuno Souto , Michal Szczachor , Rui Dinis

Light's ability to perform massive linear operations parallelly has recently inspired numerous demonstrations of optics-assisted artificial neural networks (ANN). However, a clear advantage of optics over purely digital ANN in a…

Wireless sensor networks require accurate target localization, often achieved through received signal strength (RSS) localization estimation based on maximum likelihood (ML). However, ML-based algorithms can suffer from issues such as low…

Signal Processing · Electrical Eng. & Systems 2023-07-25 Weizhong Ding , Shengming Chang , Shudi Bao , Meng Chen , Jie Sun

Fast and accurate fault detection and localization in fiber optic cables is extremely important to ensure the optical network survivability and reliability. Hence there exists a crucial need to develop an automatic and reliable algorithm…

Signal Processing · Electrical Eng. & Systems 2022-03-29 Khouloud Abdelli , Helmut Griesser , Stephan Pachnicke

Although the multi-antenna or so-called multiple-input multiple-output (MIMO) transmission has been the enabling technology for the past generations of radio-frequency (RF)-based wireless communication systems, its application to the…

Information Theory · Computer Science 2023-02-09 Shiyuan Sun , Weidong Mei , Fang Yang , Nan An , Jian Song , Rui Zhang

With the emerge of the Internet of Things (IoT), localization within indoor environments has become inevitable and has attracted a great deal of attention in recent years. Several efforts have been made to cope with the challenges of…

Information Theory · Computer Science 2022-11-17 Ashkan Goharfar , Jaber Babaki , Mehdi Rasti , Pedro H. J. Nardelli

Accurately tracking particles and determining their coordinate along the optical axis is a major challenge in optical microscopy, especially when extremely high precision is needed. In this study, we introduce a deep learning approach using…

Image and Video Processing · Electrical Eng. & Systems 2025-08-05 Andrey Alexandrov , Giovanni Acampora , Giovanni De Lellis , Antonia Di Crescenzo , Chiara Errico , Daria Morozova , Valeri Tioukov , Autilia Vittiello

The integration of Optical Intelligent Reflective Surfaces (OIRSs) into Visible Light Communication (VLC) systems is gaining momentum as a valid alternative to RF technologies, harnessing the existing lighting infrastructures and the vast…

This paper proposes recurrent neuron networks (RNNs) for a fingerprinting indoor localization using WiFi. Instead of locating user's position one at a time as in the cases of conventional algorithms, our RNN solution aims at trajectory…

Signal Processing · Electrical Eng. & Systems 2022-11-09 Minh Tu Hoang , Brosnan Yuen , Xiaodai Dong , Tao Lu , Robert Westendorp , Kishore Reddy

Exploiting wavefront curvature enables localization with limited infrastructure and hardware complexity. With the introduction of reconfigurable intelligent surfaces (RISs), new opportunities arise, in particular when the RIS is functioning…

Accurate localization in indoor environments is a challenge due to the Non Line of Sight (NLoS) nature of the signaling. In this paper, we explore the use of AI/ML techniques for positioning accuracy enhancement in Indoor Factory (InF)…

Signal Processing · Electrical Eng. & Systems 2024-10-28 Sai Prasanth Kotturi , Anil Kumar Yerrapragada , Sai Prasad , Radha Krishna Ganti

Optical neural networks offer a route to low-latency and energy-efficient inference by encoding computation in light propagation. However, most existing implementations rely on planar photonic circuits or discretely spaced diffractive…

Near-field localization is expected to play a crucial role in enabling a plethora of applications under the paradigm of 6G networks. The conventional localization methods rely on complex infrastructure for providing cooperative anchor nodes…

Signal Processing · Electrical Eng. & Systems 2026-05-06 Srikar Sharma Sadhu , Praful D. Mankar , Santosh Nannuru

Optical camera communication (OCC) exhibits considerable importance nowadays in various indoor camera based services such as smart home and robot-based automation. An android smart phone camera that is mounted on a mobile robot (MR) offers…

Networking and Internet Architecture · Computer Science 2018-10-08 Md. Shahjalal , Md. Tanvir Hossan , Moh. Khalid Hasan , Mostafa Zaman Chowdhury , Nam Tuan Le , Yeong Min Jang

Arbitrary-oriented objects widely appear in natural scenes, aerial photographs, remote sensing images, etc., thus arbitrary-oriented object detection has received considerable attention. Many current rotation detectors use plenty of anchors…

Computer Vision and Pattern Recognition · Computer Science 2020-12-16 Qi Ming , Zhiqiang Zhou , Lingjuan Miao , Hongwei Zhang , Linhao Li

$ $Visual place recognition is challenging, especially when only a few place exemplars are given. To mitigate the challenge, we consider place recognition method using omnidirectional cameras and propose a novel Omnidirectional…

Computer Vision and Pattern Recognition · Computer Science 2018-03-13 Tsun-Hsuan Wang , Hung-Jui Huang , Juan-Ting Lin , Chan-Wei Hu , Kuo-Hao Zeng , Min Sun