Juan Alberto Besada Portas

Juan Alberto Besada Portas
Universidad Politécnica de Madrid | UPM · Departamento de Señales, Sistemas y Radiocomunicaciones

PhD Telecom. Engineering

About

134
Publications
22,435
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1,130
Citations
Citations since 2017
20 Research Items
524 Citations
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Additional affiliations
January 1995 - present
Universidad Politécnica de Madrid

Publications

Publications (134)
Article
Full-text available
Unmanned traffic management (UTM) systems rely on collaborative position reporting to track unmanned aerial system (UAS) operations over wide unsurveilled (with counter-UAS systems) areas. Many different technologies, such as Remote-ID, ADS-B, FLARM, or MLAT might be used for this purpose, in addition to the direct exploitation of C2 telemetry, rel...
Article
Full-text available
Noncollaborative surveillance of airborne UAS (Unmanned Aerial System) is a key enabler to the safe integration of UAS within a UTM (Unmanned Traffic Management) ecosystem. Thus, a wide variety of new sensors (known as Counter-UAS sensors) are being developed to provide real-time UAS tracking, ranging from radar, RF analysis and image-based detecti...
Article
Background and Aims COVID19 worldwide crisis has shown the fragility of usually overbooked hospital care, encouraging improvements on the homecare and remote monitoring of patients. IMUP (Intelligent Manager for Ubiquitous Personal Mobile Care) is a Mobile App developed by UPM to follow up chronic kidney disease (CKD) patients affected with COVID19...
Article
Full-text available
Unmanned traffic management (UTM) systems will become a key enabler to the future drone market ecosystem, enabling the safe concurrent operation of both manned and unmanned aircrafts. Currently, these systems are usually tested by performing real scenarios that are costly, limited, hardly scalable, and poorly repeatable. As a solution, in this pape...
Article
Full-text available
This paper describes the requirements of a flight planning tool for safe urban operations, which may be used to design operations considering flight constraints and limitations. This system is designed to work in coordination with an unmanned traffic management system in charge of distributing available very low level airspace resources among diffe...
Conference Paper
Full-text available
This paper describes the requirements of a flight planning tool for safe urban operations, which may be used to collaboratively design flights considering traffic constraints and limitations according to an unmanned traffic management system. Representative examples of flight planning are described, as calculated by a prototype flight planning tool...
Conference Paper
Drone operators, institutions (e.g. law enforcement, rescue agencies, preservation organisms, etc.) and companies (logistics, surveillance, inspection, etc.), are constituting themselves as drone operators, at the same time that increase the size of their fleets of drones. Nowadays, each operator independently manages its drones, on service request...
Article
This paper describes a formal language for describing intent of quadrotor aircraft. The aim of this language is to support the prediction of quadrotor trajectories modelling guidance instructions in a compact and univocal manner, enabling to efficiently share trajectory information by several actors. A trajectory computation engine, translating fro...
Conference Paper
Full-text available
Drone mission definition for inspection purposes may require the operator or pilot to manage a lot of specific data. This process is time consuming, and validation prior to the flight is highly recommended to be able to fulfil the mission with the minimum risks and the maximum efficiency. This paper explores the use of wearable Mixed Reality as a t...
Chapter
Full-text available
Drones are increasingly being used to provide support to inspection tasks in many industrial sectors and civil applications. The procedure is usually completed off-line by the final user, once the flight mission terminated and the video streaming and conjoint data gathered by the drone were examined. The procedure can be improved with real-time ope...
Article
Full-text available
This paper describes a Mission Definition System and the automated flight process it enables to implement measurement plans for discrete infrastructure inspections using aerial platforms, and specifically multi-rotor drones. The mission definition aims at improving planning efficiency with respect to state-of-the-art waypoint-based techniques, usin...
Article
This paper presents a new non-linear filter designed to track targets following a road network, taking advantage of the road map information. The algorithm is based on a Bayesian Multiple Hypotheses modelling of movement process, postulating and evaluating different hypotheses on the segments being followed by the target after road junctions. Then,...
Patent
A method includes generating an initial flight context that includes a set of unresolved flight constraints. The method further includes generating a decision tree based on the initial flight context. The decision tree includes a plurality of flight contexts corresponding to leaves of the decision tree. The method also includes expanding the decisi...
Article
Full-text available
In this paper, a complete and rigorous mathematical model for secondary surveillance radar systematic errors (biases) is developed. The model takes into account the physical effects systematically affecting the measurement processes. The azimuth biases are calculated from the physical error of the antenna calibration and the errors of the angle det...
Conference Paper
Big displays and ultrawalls are increasingly present in nowadays environments (e.g. in city spaces, buildings, transportation means, teaching rooms, operation rooms, convention centres, etc.), at the same time that they are widely used as tools for collaborative work, monitoring and control in many other contexts. How to enhance interaction with bi...
Article
Full-text available
This paper introduces a fast algorithm that finds collision-free 3D paths for unmanned aircraft in urban environments. These environments are represented by a three-dimensional scenario in which obstacles are vertical polyhedra. This algorithm uses a method to reduce the number of obstacles taken into account in the path finding process. This metho...
Article
This paper presents a novel approach for the generation of an aircraft intent that unambiguously describes the behavior of the aircraft during a flight. This behavior is the result of modeling the piloting strategies used by an automation system, such as a flight management system or a pilot, to comply with the set of prescribed constraints include...
Article
Tracking of a handheld device's three-dimensional (3-D) position and orientation is fundamental to various application domains, including augmented reality (AR), virtual reality, and interaction in smart spaces. Existing systems still offer limited performance in terms of accuracy, robustness, computational cost, and ease of deployment. We present...
Article
Full-text available
This paper explores the feasibility of a contactless identification system based on hand features. The identification solution has been designed to be integrated with smart space applications and relies on a commercial 3D sensor (i.e., Leap Motion) for palm features capture. The first part of the paper is devoted to evaluate the significance of the...
Article
Six-degree-of-freedom (6-DoF) pose estimation is of fundamental importance to many applications, such as robotics, indoor tracking and Augmented Reality. Although a number of pose estimation solutions have been proposed, it remains a critical challenge to provide a low-cost, real-time, accurate and easy-to-deploy solution. Addressing this issue, th...
Article
Nowadays, it is technologically feasible to augment an interior or closed room by creating virtual windows. This paper describes a fully functional system designed to virtually emulate a window by using Kinect-based tracking, prerecorded videos, and COTS hardware (standard PCs and Full HD TVs). The key aspects of the overall architecture design are...
Article
This paper proposes the adoption of a set of ground support tools to assist the approach controller on issuing and monitoring spacing instructions where interval management operations are carried out. The algorithmic basis of these tools, based on computing feasible maneuvers to achieve the desired spacing and monitoring their safe execution, is de...
Article
Full-text available
This paper aims at studying the viability of setting up a contactless identification system based on hand features, with the objective of integrating this functionality as part of different services for smart spaces. The final identification solution will rely on a commercial 3D sensor (i.e. Leap Motion) for palm feature capture. To evaluate the si...
Article
Smartphones have a great potential as tools to adapt daily living spaces to the specific needs of its inhabitants. These devices usually host selected content, personal information and useful applications for their users, apart from continuously gathering their context data and preferences. Taking this fact as starting point, this paper describes P...
Article
This paper describes two systems that can be used to obtain realistic random traffic samples in a terminal area: a real traffic analyser and a synthetic traffic generator. These two systems allow the air traffic management (ATM) engineer to gain insight on the traffic structure of the area under analysis, and allow obtaining realistic traffic sampl...
Conference Paper
Commercial off-the-shelf gaming devices (e.g. such as Kinect) are demonstrating to have a great potential beyond their initial service purpose. In particular, when integrated within the environment or as part of smart objects, peripheral COTS for gaming may facilitate the definition of novel interaction methods, particularly applicable to smart spa...
Patent
The present invention provides a computer-implemented method of generating an aircraft intent description expressed in a formal language that provides an unambiguous four-dimensional description of an aircraft's intended motion and configuration during a period of flight. A flight intent description is parsed to provide instances of flight intent t...
Conference Paper
With the rapid advances in mobile computing, handheld Augmented Reality draws increasing attention. Pose tracking of handheld devices is of fundamental importance to register virtual information with the real world and is still a crucial challenge. In this paper, we present a low-cost, accurate and robust approach combining fiducial tracking and in...
Article
Full-text available
A key issue when making spaces smart is the availability of satisfying and personalized interaction methods, for the user to comfortably manage the physical and virtual resources in the environment. Among the multiple interaction approaches that are nowadays being explored with this objective, gesture-based ones seem to have a great potential. In t...
Article
Pointing is a universal gesture that naturally expresses interest or attraction towards the pointed items. If some 'magic' is added, the gesture may also make these items perform actions. In this paper, we describe a system that enables to interact by pointing with digital or physical controllable resources distributed in a smart space. The system...
Patent
The present disclosure provides a computer-implemented method of generating a description of aircraft intent expressed in a formal language that provides an unambiguous description of an aircraft's intended motion and configuration during a period of flight. A description of flight intent is parsed to provide instances of flight intent, each instan...
Patent
The present disclosure provides a computer-implemented method of generating a description of aircraft intent expressed in a formal language that provides an unambiguous description of an aircraft's intended motion and configuration during a period of flight. A description of flight intent is parsed to provide instances of flight intent, each instan...
Article
Full-text available
The limited efficiency of current air traffic systems will require a next-generation of Smart Air Traffic System (SATS) that relies on current technological advances. This challenge means a transition toward a new navigation and air-traffic procedures paradigm, where pilots and air traffic controllers perform and coordinate their activities accordi...
Article
Full-text available
Pedestrian tracking is one of the bases for many ubiquitous context-aware services, but it is still an open issue in indoor environments or when GPS estimations are not optimal. In this paper, we propose two novel different data fusion algorithms to track a pedestrian using current positioning technologies (i.e., GPS, received signal strength local...
Conference Paper
This paper describes a method to define the performance requirements for Airport Surface Surveillance. The key idea is making the performance specification dependent on the underlying sensor deployment and geometric definition of the scenario, which enables its extension to any operational deployment. The described methodology was used in SESAR tec...
Patent
The present disclosure provides a computer-implemented method of generating a description of aircraft intent expressed in a formal language that provides an unambiguous description of an aircraft's intended motion and configuration during a period of flight. A description of flight intent is parsed to provide instances of flight intent, each instan...
Article
This paper describes an improved version of our intent-related hierarchy of formal languages designed to describe aircraft trajectories. These languages allow a complete or partial specification of aircraft trajectories at different levels, and the extension of its features described in this paper allows their applicability to define more complex k...
Article
The transition from the current air traffic management system toward trajectory-based operations requires the synchronization of trajectory information between all stakeholders and is regarded as one of its main challenges. The guidance system extracts from this trajectory a set of guidance targets (GT) to be tracked by the automatic flight control...
Article
This paper presents a new approach for off-line trajectory reconstruction in air traffic control domain. The proposed algorithm, called model-based reconstruction, performs an accurate IMM smoothing process whose parameters are modified along time according to the flight modes segmented from trajectory measurements. Its competitive performance is d...
Conference Paper
In this paper we advocate the definition of a ground support tool which should assist the approach controller on issuing and monitoring spacing instructions in an ATC environment where ASAS-IM-S&M procedures are permitted. We describe the algorithmic basis for two potential sub-functions of such ground support tool, which compute feasible maneuvers...
Conference Paper
Full-text available
In this paper we advocate the definition of a ground support tool which should assist the approach controller on issuing and monitoring spacing instructions in an ATC environment where ASAS-IM-S&M procedures are permitted. We describe the algorithmic basis for two potential sub-functions of such ground support tool, which compute feasible maneuvers...
Article
This paper proposes a new paradigm for the formulation of aircraft trajectory computation and prediction processes. Under this paradigm, an aircraft trajectory can be expressed at different levels of detail using a set of novel intent-related formal languages. These languages can be used for describing different aspects of aircraft motion or the re...
Conference Paper
The purpose of this paper is to assess the improvements in trajectory prediction accuracy that result from enhancing the quality of the input data and supporting models of a groundbased Trajectory Predictor (TP). Focus is on the prediction of continuous descent trajectories where improvements to the quality of TP input data and models have been app...
Conference Paper
When designing services to control the behavior of a smart environment, it is feasible to rely on mobile devices as mediators to empower the user and handle his needs and preferences. In this direction, this paper describes a concept for mobile-object instrumented interaction through a system that enables the orchestration of a set of smart objects...
Article
Currently most air traffic controller decisions are based on the information provided by the ground support tools provided by automation systems, based on a network of surveillance sensors and the associated tracker. To guarantee surveillance integrity, it is clear that performance assessments of the different elements of the surveillance system ar...
Conference Paper
RSS-based localization techniques are widely used in indoor environments to estimate the position of people or objects. Recent work proposes to combine this localization technique with a dead reckoning strategy (using inertial sensors on the person or object to be tracked) to improve the accuracy of the localization results and, at the same time, t...
Article
Current bias estimation algorithms for air traffic control (ATC) surveillance are focused on radar sensors, but the integration of new sensors (especially automatic dependent surveillance-broadcast and wide area multilateration) demands the extension of traditional procedures. This study describes a generic architecture for bias estimation applicab...
Conference Paper
In this paper the effect of different aircraft automated descent guidance strategies on fuel burn and the temporal predictability of the executed trajectory is investigated. The paper aims to provide an understanding of how airborne automation can be permitted by Air Traffic Control to remain in control of the descent in the presence of disturbance...
Article
This paper describes an automatic-dependent surveillance–broadcast (ADS–B) implementation for air-to-air and ground-based experimental surveillance within a prototype of a fully automated air traffic management (ATM) system, under a trajectory-based-operations paradigm. The system is built using an air-inclusive implementation of system wide inform...
Conference Paper
Full-text available
This paper advocates the definition of a standardized formal language detailing airport surface movements, taking into account the specific details of airport environment. This proposed specification will be called Surface Movement Description (SMD). The paper describes its use as the representation backbone to share surface movements in an airport...
Conference Paper
Full-text available
There are many studies related with airport surface routing algorithms, based on different approaches and with different evaluation methods and metrics. So, the need of performing a balanced analysis and comparison using a common framework is evident. This paper presents an implementation of an evaluation tool for airport surface routing algorithms...
Article
This paper presents a set of new centralized algorithms for estimating the state of linear dynamic Multiple-Input Multiple-Output (MIMO) control systems with asynchronous, non-systematically delayed and corrupted measurements provided by a set of sensors. The delays, which make the data available Out-Of-Sequence (OOS), appear when using physically...
Conference Paper
Full-text available
This paper describes a method to enhance current surveillance systems used in air traffic control. Those systems are currently based on statistical data fusion, relying on a set of statistical models and assumptions. The proposed method allows for the on-line calibration of those models and enhanced detection of non-ideal situations, increasing sur...
Conference Paper
This paper describes a novel method to enhance current airport surveillance systems used in Advanced Surveillance Monitoring Guidance and Control Systems (A-SMGCS). The proposed method allows for the automatic calibration of measurement models and enhanced detection of non-ideal situations, increasing surveillance products integrity. It is based on...
Article
Full-text available
This paper presents the architecture and the methods used to dynamically simulate the sea backscatter of an airborne radar operating in a medium repetition frequency mode (MPRF). It offers a method of generating a sea backscatter signal which fulfills the intensity statistics of real clutter in time domain, spatial correlation and local Doppler spe...
Conference Paper
This work presents a method to estimate and correct slow time-dependent position errors due to non perfect ground station synchronization and tropospheric propagation. It uses opportunity traffic emissions, i.e. signals transmitted from the aircrafts within the coverage zone. This method is used to overcome the difficulty of installing reference be...
Conference Paper
This paper describes an ADS-B implementation in air-to-air and ground based experimental surveillance within a prototype ATM system. The relations between airborne and ground systems related to surveillance are detailed, and the prototype surveillance systems and their algorithms described. Their performance is analysed, based both on simulated and...
Article
The convenience and effectiveness of using case and project-based learning in undergraduate courses in engineering degrees is currently a subject of debate in many academic forums. While some lecturers support the advantages of these constructive learner-centred methods independently of the topic, others are sceptical about their use, mainly when a...
Conference Paper
This paper describes a prototype implementation of ADS-B in an air-to-air surveillance system. This air surveillance system was defined for an experimental project on future civilian air traffic management, which imposes new requirements over both air and ground surveillance systems. In this paper the relation between the different airborne and gro...
Conference Paper
Full-text available
Current and future air traffic is requiring new procedures and systems to achieve a greater automation of air-traffic operations. Particular difficulty presents the automation of arrival air-traffic operations in terminal areas due to aircraft speeds and environment variability into a delimited airspace where multiple aircraft converge. Several pro...
Conference Paper
Full-text available
This paper describes a pair of systems which can be used to obtain realistic traffic samples in a Sector/TMA from a given real traffic database. Those are a traffic analyzer and a traffic pattern generator. These two systems allow the ATM engineer to both gain insight on the traffic structure of the area under analysis and to obtain statistically s...
Conference Paper
Full-text available
Methods to estimate and correct slow time-variant position errors due to bad synchronization and propagation in Wide Area Multilateration Systems (WAM) are presented. The procedure does not use emitters at known locations. Instead it uses opportunity traffic emissions (from the aircraft present in coverage). The need for these methods came from the...
Conference Paper
Full-text available
This paper describes an off-line bias estimation and correction system for air traffic control related sensors, used in a newly developed Eurocontrol tool for the assessment of ATC surveillance systems. Current bias estimation algorithms are mainly focused in radar sensors, but the installation of new sensors (especially automatic dependent surveil...
Article
Full-text available
The fusion center of a complex control system estimates its state with the information provided by different sensors. Physically distributed sensors, communication networks, pre-processing algorithms, multitasking, etc, introduce non-systematic delays in the arrival of information to the fusion center, making the information available out-of-sequen...
Article
Full-text available
This paper describes some key points of a new tool being currently developed by Eurocontrol for the assessment of air traffic control (ATC) multisensor trackers performance. It summarizes the algorithmic foundations of the high-accuracy trajectory reconstruction process used to obtain reference trajectories from recorded measures. These trajectorie...
Article
Trajectory Based Operations (TBO) will require new procedures and systems to achieve a suitable automation of airtraffic operations. Procedures and systems for automated operations are closely related and therefore frequently they need to be modeled in a combined way. Our group is currently employing recent agent-oriented methodological approaches...
Conference Paper
Future air traffic is demanding innovative procedures and systems that take advance of new technologies capabilities. Especially significant are new procedures and systems for automating arrival air traffic operations in terminal areas. In this work, we present an air-air negotiation protocol to be used as a new component of the on board automation...
Conference Paper
In this paper we propose the use of a weighted least squares estimator to calculate the position of a mobile node in RSS-based localization systems for ad hoc networks. This technique outperforms the traditional positioning algorithms in terms of localization accuracy and robustness to inaccuracy in the channel model. The performance of the method...
Conference Paper
Full-text available
This paper is focused on trajectory reconstruction techniques for evaluating ATC systems, using real data of recorded opportunity traffic. We analyze different alternatives for this problem, from traditional interpolation approaches based on curve fitting to our proposed schemes based on modeling regular motion patterns with optimal smoothers. The...
Conference Paper
In this paper some key points of a new tool being currently developed by Eurocontrol for air traffic control multiradar-multisensor data processing systems performance assessment are described. It summarizes the algorithmic foundations of the trajectory reconstruction process used to obtain reference trajectories from recorded measures. Example res...
Conference Paper
Full-text available
In this paper we describe a new tool being currently developed by Eurocontrol for air traffic control multiradar-multisensor data processing systems assessment. This tool, called TRES (trajectory reconstruction and evaluation suite), will become in a near future a replacement for some parts of current versions of SASS-C (Surveillance Analysis Suppo...