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Ultra Wideband Channel Model for Indoor Environments
Alvarez, Alvaro,Valera, Gustavo,Manuel Lobeira,Torres, Rafael-Pedro,Garcia, Jose-Luis The Korea Institute of Information and Commucation 2003 Journal of communications and networks Vol.5 No.4
This paper presents an in-depth study of a UWB indoor radio channel between 1 and 9 GHz, which was used for the subsequent development of a new statistical UWB multipath channel model, focusing on short range indoor scenarios. The channel sounding process was carried out covering different indoor environments, such as laboratories, halls or corridors. A combination of new and traditional parameters has been used to accurately model the channel impulse response in order to perform a precise temporal estimation of the received pulse shape. This model is designed specifically for UWB digital systems, where the received pulse is correlated with an estimated replica of itself. The precision of the model has been verified through the comparison with measured data from equivalent scenarios and cases, and highly satisfactory results were obtained.
Autonomous Access to the Moon for Europe: The European Large Logistic Lander
Markus Landgraf,Ludovic Duvet,Alexander Cropp,Gustavo Alvarez,Grzegorz Ambroszkiewicz,Massimiliano Bottacini,Pierre Brunner,Lorenzo Bucci,William Carey,Andrea Emanuele Maria Casini,Giorgio Cifani,Oliv 한국항공우주학회 2022 한국항공우주학회 학술발표회 논문집 Vol.2022 No.11
An Approach to Art Collections Management and Content-based Recovery
De Celis Herrero, Concepcion Perez,Alvarez, Jaime Lara,Aguilar, Gustavo Cossio,Garcia, Maria Josefa Somodevilla Korea Information Processing Society 2011 Journal of information processing systems Vol.7 No.3
This study presents a comprehensive solution to the collection management, which is based on the model for Cultural Objects (CCO). The developed system manages and spreads the collections that are safeguarded in museums and galleries more easily by using IT. In particular, we present our approach for a non-structured search and recovery of the objects based on the annotation of artwork images. In this methodology, we have introduced a faceted search used as a framework for multi-classification and for exploring/browsing complex information bases in a guided, yet unconstrained way, through a visual interface.