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    • closedAccess   A Collaborative Approach Using Neural Networks for BLE-RSS Lateration-Based Indoor Positioning 

      Pascacio, Pavel; Torres-Sospedra, Joaquín; Casteleyn, Sven; Lohan, Elena Simona IEEE (2022)
      In daily life, mobile and wearable devices with high computing power, together with anchors deployed in indoor environments, form a common solution for the increasing demands for indoor location-based services. Within ...

    • openAccess   A comparative study in the standardisation of IoT devices using geospatial web standards 

      Marsh-Hunn, Daniel; Trilles, Sergio; González-Pérez, Alberto; Torres-Sospedra, Joaquín; Ramos, Jose Francisco Institute of Electrical and Electronics Engineers (2020-10-15)
      Although billions of devices are embedded in the World Wide Web through the Internet of Things, there is still a lack of a common, interoperable way to connect them and make them interact seamlessly. IoT has also found its ...

    • openAccess   A comparative study on VGI and professional noise data 

      García-Martí, Irene; Torres-Sospedra, Joaquín; Rodríguez-Pupo, Luis E. AGILE Digital Editions (2014-06)
      The ubiquitous nature of mobile devices and its growing presence in urban areas, turn them up into low cost environmental monitoring platforms. In this field, several authors made different efforts to provide alternatives ...

    • openAccess   A Comprehensive and Reproducible Comparison of Clustering and Optimization Rules in Wi-Fi Fingerprinting2020 

      Torres-Sospedra, Joaquín; Richter, Philipp; Moreira, Adriano; Mendoza-Silva, Germán Martín; Lohan, Elena Simona; Trilles, Sergio; Matey-Sanz, Miguel; Huerta, Joaquin IEEE (2020-08-17)
      Wi-Fi fingerprinting is a well-known technique used for indoor positioning. It relies on a pattern recognition method that compares the captured operational fingerprint with a set of previously collected reference samples ...

    • openAccess   A Low-Cost Control Occupancy Solution Using a Time-of-Flight Ranging Sensor Laser 

      Bartrés Jurado, Enric; Trilles, Sergio; Perez-Navarro, Antoni; Torres-Sospedra, Joaquín CEUR Workshop Proceedings (2022)
      The pandemic situation has driven to several measures to prevent the spread of COVID-19. One of these measures is social distance and, as a consequence, limitation of capacity of indoor closed spaces. This makes necessary ...

    • openAccess   A Meta-Review of Indoor Positioning Systems 

      Mendoza-Silva, Germán Martín; Torres-Sospedra, Joaquín; Huerta, Joaquin MDPI (2019)
      An accurate and reliable Indoor Positioning System (IPS) applicable to most indoor scenarios has been sought for many years. The number of technologies, techniques, and approaches in general used in IPS proposals is ...

    • openAccess   A new approach to visual-based sensory system for navigation into orange groves 

      Torres-Sospedra, Joaquín; Nebot Roglá, Patricio MDPI Publishing (2011-04-06)
      One of the most important parts of an autonomous robot is to establish the path by which it should navigate in order to successfully achieve its goals. In the case of agricultural robotics, a procedure that determines this ...

    • openAccess   A new HLA-based distributed control architecture for agricultural teams of robots in hybrid applications with real and simulated devices or environments 

      Nebot Roglá, Patricio; Torres-Sospedra, Joaquín; Martínez, Rafael J. MDPI Publishing (2011-04-14)
      The control architecture is one of the most important part of agricultural robotics and other robotic systems. Furthermore its importance increases when the system involves a group of heterogeneous robots that should ...

    • openAccess   A radiosity-based method to avoid calibration for Indoor Positioning Systems 

      Belmonte-Fernández, Óscar; Montoliu Colás, Raul; Torres-Sospedra, Joaquín; Sansano-Sansano, Emilio; Chia-Aguilar, Daniel Elsevier (2018-09-01)
      Due to the widespread use of mobile devices, services based on the users current indoor location are growing in significance. Such services are developed in the Machine Learning and Experst Systems realm, and ranges from ...

    • openAccess   A realistic evaluation of indoor positioning systems based on Wi-Fi fingerprinting: The 2015 EvAAL–ETRI competition 

      Torres-Sospedra, Joaquín; Moreira, Adriano; Knauth, Stefan; Berkvens, Rafael; Montoliu Colás, Raul; Belmonte-Fernández, Óscar; Trilles, Sergio; Nicolau, Maria João; Meneses, Filipe; Costa, António; Koukofikis, Athanasios; Weyn, Maarten; Peremans, Herbert IOS press (2017-02)
      This paper presents results from comparing different Wi-Fi fingerprinting algorithms on the same private dataset. The algorithms where realized by independent teams in the frame of the off-site track of the EvAAL–ETRI ...

    • openAccess   A Statistical Approach for Studying the Spatio-Temporal Distribution of Geolocated Tweets in Urban Environments 

      Santa, Fernando; Henriques, Roberto; Torres-Sospedra, Joaquín; Pebesma, Edzer MDPI (2019)
      An in-depth descriptive approach to the dynamics of the urban population is fundamental as a first step towards promoting effective planning and designing processes in cities. Understanding the behavioral aspects of human ...

    • openAccess   A Survey on Wearable Technology: History, State-of-the-Art and Current Challenges 

      Ometov, Aleksandr; Shubina, Viktoriia; Klus, Lucie; Skibińska, Justyna; Saafi, Salwa; Pascacio, Pavel; Flueratoru, Laura; Quezada Gaibor, Darwin; Chukhno, Nadezhda; Chukhno, Olga; Ali, Asad; Channa, Asma; Svertoka, Ekaterina; QAIM, WALEED BIN; Casanova-Marqués, Raúl; Holcer, Sylvia; Torres-Sospedra, Joaquín; Casteleyn, Sven; Ruggeri, Giuseppe; ARANITI, Giuseppe; Burget, Radim; Hosek, Jiri Elsevier (2021-04-08)
      Technology is continually undergoing a constituent development caused by the appearance of billions new interconnected “things” and their entrenchment in our daily lives. One of the underlying versatile technologies, namely ...

    • openAccess   Accuracy of a single position estimate for kNN-based fingerprinting indoor positioning applying error propagation theory 

      Perez-Navarro, Antoni; Montoliu Colás, Raul; Sansano-Sansano, Emilio; Martínez Garcia, marina; Femenia, Ruben; Torres-Sospedra, Joaquín IEEE (2023-06-23)
      Indoor Positioning Systems usually consider the average positioning error over a set of evaluation samples, or a quartile of that value, as the global error. However, they do not provide a metric for the uncertainty for ...

    • openAccess   Advances in Indoor Positioning and Indoor Navigation 

      Perez-Navarro, Antoni; Montoliu Colás, Raul; Torres-Sospedra, Joaquín MDP (2022)

    • openAccess   An Indoor Positioning System Based on Wearables for Ambient-Assisted Living 

      Belmonte-Fernández, Óscar; Puertas-Cabedo, Adrian; Torres-Sospedra, Joaquín; Montoliu Colás, Raul; Trilles, Sergio MDPI (2016)
      The urban population is growing at such a rate that by 2050 it is estimated that 84% of the world’s population will live in cities, with flats being the most common living place. Moreover, WiFi technology is present in ...

    • openAccess   An occupancy simulator for a smart parking system: Developmental design and experimental considerations 

      Mendoza-Silva, Germán Martín; Gould, Michael; Montoliu Colás, Raul; Torres-Sospedra, Joaquín; Huerta, Joaquin MDPI (2019-05)
      This paper presents the development of a parking occupancy simulator to support a smart parking system. The simulator uses an agent-based approach to model drivers who follow activity plans and who may or may not use the ...

    • openAccess   Analysis of Received Signal Strength Quantization in Fingerprinting Localization 

      Khandker, Syed; Torres-Sospedra, Joaquín; Ristaniemi, Tapani MDPI (2020)
      In recent times, Received Signal Strength (RSS)-based Wi-Fi fingerprinting localization has become one of the most promising techniques for indoor localization. The primary aim of RSS is to check the quality of the signal ...

    • openAccess   Anonymous Attribute-based Credentials in Collaborative Indoor Positioning Systems 

      Casanova-Marqués, Raúl; Pascacio, Pavel; Hajny, Jan; Torres-Sospedra, Joaquín SciTePress (2021-07-06)
      Collaborative Indoor Positioning Systems (CIPSs) have recently received considerable attention, mainly because they address some existing limitations of traditional Indoor Positioning Systems (IPSs). In CIPSs, Bluetooth ...

    • closedAccess   ATM-based analysis and recognition of handball team activities 

      Montoliu Colás, Raul; Martín Félez, Raúl; Torres-Sospedra, Joaquín; Rodríguez Pérez, Sergio Elsevier (2015)
      In this paper, a new methodology based on the Author Topic Model (ATM) method is presented to perform team activity recognition and analysis in handball videos. Instead of using players׳ trajectories we just rely on low ...

    • openAccess   Beyond Euclidean Distance for Error Measurement in Pedestrian Indoor Location 

      Mendoza-Silva, Germán Martín; Torres-Sospedra, Joaquín; Potortì, Francesco; Moreira, Adriano; Knauth, Stefan; Berkvens, Rafael; Huerta, Joaquin Institute of Electrical and Electronics Engineers (2020-09-04)
      Indoor positioning systems (IPSs) suffer from a lack of standard evaluation procedures enabling credible comparisons: this is one of the main challenges hindering their widespread market adoption. Traditionally, accuracy ...