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Chilo, José
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Publications (10 of 59) Show all publications
Postigo-Málaga, M., Porras Figueroa, L. & Chilo, J. (2019). Low Cost Outdoors WSN Parking System for Metropolitan Areas Based on RSS. In: 2019 10th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS): . Paper presented at 10th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS). IEEE, 1
Open this publication in new window or tab >>Low Cost Outdoors WSN Parking System for Metropolitan Areas Based on RSS
2019 (English)In: 2019 10th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS), IEEE, 2019, Vol. 1Conference paper, Published paper (Refereed)
Abstract [en]

Finding a free parking space in the metropolitan areas during rush hour is time consuming and it leads to traffic congestions and air pollution. Wireless Sensor Network (WSN) can be used to obtain information related to the parking condition requiring very little installation and maintenance costs. In this work, we present the design and implementation of an outdoor parking system based on Wireless Sensor Networks (WSNs), received signal strength (RSS) and pattern recognition algorithms to effectively find free parking spaces. Simulation and experiment results show good performance in the verification of the parking system. XBee-PRO 900HP-S3B modules with high performance and low power consumption were used. These modules support the IEEE-802.15.4 protocol for communication in the 900 MHz band and can be configured in different network topologies. The received signal strength (RSS) was measured to form fingerprints for the parking spaces availability (busy or vacant). Kalman filters were implemented to improve RSS which varies due to the effects of short-term fading. The parking spaces availability was evaluated with different classification algorithms in the WEKA environment with results up to 85%.

Place, publisher, year, edition, pages
IEEE, 2019
Keywords
Fingerprints, Kalman filter, Pattern recognition algorithms, Wireless sensor network
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:hig:diva-31273 (URN)10.1109/IDAACS.2019.8924422 (DOI)2-s2.0-85077076638 (Scopus ID)978-1-7281-4069-8 (ISBN)
Conference
10th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS)
Available from: 2019-12-12 Created: 2019-12-12 Last updated: 2020-01-07Bibliographically approved
Mendoza Montoya, J. & Chilo, J. (2019). RealTime Wireless Monitoring System of CO2 and CH4 in Juliaca-Perú. In: : . Paper presented at 10th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS), Metz, France, 18-21 September 2019. IEEE
Open this publication in new window or tab >>RealTime Wireless Monitoring System of CO2 and CH4 in Juliaca-Perú
2019 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a measurement system to greenhouse gases (GHG) monitoring. GHGs are formed by the emission of Carbon Dioxide (CO 2 ) and Methane (CH 4 ) from vehicles and near located landfills in Juliaca city in Perú. A wireless system is developed using MOS sensors (MQ2, MQ4, TGS2611 and MQ-135), Arduino-nano, XBee wireless communications modules and the interface to the computer is written in Python. The system was tested in real field measurements and the results show gas concentration difference in different points of the city. We could observe that the CO 2 content in places with a large number of vehicles is high and places with organic waste, like fresch product market, the CH 4 content is also high.

Place, publisher, year, edition, pages
IEEE, 2019
Keywords
Carbon dioxide CO2, Global warming potential (GWP), Greenhouse gas (GHG, )Methane CH4
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:hig:diva-31274 (URN)10.1109/IDAACS.2019.8924332 (DOI)2-s2.0-85077094088 (Scopus ID)978-1-7281-4069-8 (ISBN)
Conference
10th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS), Metz, France, 18-21 September 2019
Available from: 2019-12-12 Created: 2019-12-12 Last updated: 2020-01-07Bibliographically approved
Climent, E., Pelegri-Sebastia, J., Sogorb, T., Talens, J. B. & Chilo, J. (2017). Development of the MOOSY4 eNose IoT for Sulphur-Based VOC Water Pollution Detection. Sensors, 17(8), Article ID E1917.
Open this publication in new window or tab >>Development of the MOOSY4 eNose IoT for Sulphur-Based VOC Water Pollution Detection
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2017 (English)In: Sensors, ISSN 1424-8220, E-ISSN 1424-8220, Vol. 17, no 8, article id E1917Article in journal (Refereed) Published
Abstract [en]

In this paper, we describe a new low-cost and portable electronic nose instrument, the Multisensory Odor Olfactory System MOOSY4. This prototype is based on only four metal oxide semiconductor (MOS) gas sensors suitable for IoT technology. The system architecture consists of four stages: data acquisition, data storage, data processing, and user interfacing. The designed eNose was tested with experiment for detection of volatile components in water pollution, as a dimethyl disulphide or dimethyl diselenide or sulphur. Therefore, the results provide evidence that odor information can be recognized with around 86% efficiency, detecting smells unwanted in the water and improving the quality control in bottled water factories.

Keywords
ANN, MOOSY4, WEKA, electronic nose, embedded, water quality
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:hig:diva-25107 (URN)10.3390/s17081917 (DOI)000408576900220 ()28825645 (PubMedID)2-s2.0-85028068549 (Scopus ID)
Available from: 2017-08-25 Created: 2017-08-25 Last updated: 2018-03-13Bibliographically approved
Chilo, J., Pelegri-Sebastia, J., Cupane, M. & Sogorb, T. (2016). E-nose application to food industry production. IEEE Instrumentation & Measurement Magazine, 19(1), 27-33
Open this publication in new window or tab >>E-nose application to food industry production
2016 (English)In: IEEE Instrumentation & Measurement Magazine, ISSN 1094-6969, E-ISSN 1941-0123, Vol. 19, no 1, p. 27-33Article in journal (Refereed) Published
Abstract [en]

Food companies worldwide must constantly engage in product development to stay competitive, cover existing markets, explore new markets, and meet key consumer requirements. This ongoing development places high demands on achieving quality at all levels, particularly in terms of food safety, integrity, quality, nutrition, and other health effects. Food product research is required to convert the initial product idea into a formulation for upscaling production with ensured significant results. Sensory evaluation is an effective component of the whole process. It is especially important in the last step in the development of new products to ensure product acceptance. In that stage, measurements of product aroma play an important role in ensuring that consumer expectations are satisfied. To this end, the electronic nose (e-nose) can be a useful tool to achieve this purpose. The e-nose is a combination of various sensors used to detect gases by generating signals for an analysis system. Our research group has investigated the scent factor in some foodstuff and attempted to develop e-noses based on low-cost technology and compact size. In this paper, we present a summary of our research to date on applications of the e-nose in the food industry.

Keywords
Food industry, Gas detectors, Pollution measurement, Principal component analysis, Production, Sensor systems
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Food Science
Identifiers
urn:nbn:se:hig:diva-21109 (URN)10.1109/MIM.2016.7384957 (DOI)000368979600007 ()2-s2.0-84962271269 (Scopus ID)
Available from: 2016-01-26 Created: 2016-01-26 Last updated: 2018-03-13Bibliographically approved
Ferrer-Coll, J., Slimane, B., Chilo, J. & Stenumgaard, P. (2015). Detection and Suppression of Impulsive Noise in OFDM Receiver. Wireless personal communications, 85(4), 2245-2259
Open this publication in new window or tab >>Detection and Suppression of Impulsive Noise in OFDM Receiver
2015 (English)In: Wireless personal communications, ISSN 0929-6212, E-ISSN 1572-834X, Vol. 85, no 4, p. 2245-2259Article in journal (Refereed) Published
Abstract [en]

In recent years, the use of wireless systems in industrial applications has experienced spectacular growth. Unfortunately, industrial environments often present impulsive noise which degrades the reliability of wireless systems. OFDM is an enhanced technology used in industrial communication to monitor the work and movement of employees using high quality video. However, OFDM is sensitive to high amplitude impulsive noise because the noise energy spreads among all OFDM sub-carriers. This paper proposes a receiver structure consisting of two stages: a detector stage combining Fisher’s Quadratic discriminant and Gaussian Hypothesis techniques, and a suppression stage optimized by setting well defined thresholds. The receiver structure has been tested by simulations and measurements providing an increment in the probability of detection and improving the system performance.

Keywords
Bit error rate (BER), Detection technique, Impulsive noise, Impulsive noise suppression, Industrial environments, OFDM
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering Telecommunications
Identifiers
urn:nbn:se:hig:diva-20350 (URN)10.1007/s11277-015-2902-4 (DOI)000365730000033 ()2-s2.0-84948710556 (Scopus ID)
Available from: 2015-09-29 Created: 2015-09-29 Last updated: 2018-03-13Bibliographically approved
Savic, V., Ferrer-Coll, J., Ängskog, P., Chilo, J., Stenumgaard, P. & Larsson, E. G. (2015). Measurement analysis and channel modeling for TOA-based ranging in tunnels. IEEE Transactions on Wireless Communications, 14(1), 456-467
Open this publication in new window or tab >>Measurement analysis and channel modeling for TOA-based ranging in tunnels
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2015 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 14, no 1, p. 456-467Article in journal (Refereed) Published
Abstract [en]

A robust and accurate positioning solution is required to increase the safety in GPS-denied environments. Although there is a lot of available research in this area, little has been done for confined environments such as tunnels. Therefore, we organized a measurement campaign in a basement tunnel of Linköping university, in which we obtained ultra-wideband (UWB) complex impulse responses for line-of-sight (LOS), and three non-LOS (NLOS) scenarios. This paper is focused on time-of-arrival (TOA) ranging since this technique can provide the most accurate range estimates, which are required for range-based positioning. We describe the measurement setup and procedure, select the threshold for TOA estimation, analyze the channel propagation parameters obtained from the power delay profile (PDP), and provide statistical model for ranging. According to our results, the rise-time should be used for NLOS identification, and the maximum excess delay should be used for NLOS error mitigation. However, the NLOS condition cannot be perfectly determined, so the distance likelihood has to be represented in a Gaussian mixture form. We also compared these results with measurements from a mine tunnel, and found a similar behavior.

Keywords
channel modeling, impulse response, positioning, ranging, time of arrival, Tunnels, ultrawideband, Channel capacity, Maximum likelihood estimation, Range finding, Ultra-wideband (UWB), Channel model, Measurement campaign, NLOS error mitigations, Nlos identifications, Power delay profiles, Statistical modeling, Time of arrival (TOA)
National Category
Communication Systems
Identifiers
urn:nbn:se:hig:diva-18917 (URN)10.1109/TWC.2014.2350493 (DOI)000349675400037 ()2-s2.0-84921333804 (Scopus ID)
Funder
Swedish Foundation for Strategic Research
Available from: 2015-02-04 Created: 2015-02-04 Last updated: 2018-03-13Bibliographically approved
Cupane, M., Pelegrí Sebastiá, J., Guarrasi, V., Chilo, J. & Sogorb, T. (2014). Electronic nose to detect off-flavor of drinking water. In: : . Paper presented at Proc. 12th Congresso Nazionale Società Italiana di Biofísica Pura e Applicata (SIBPA) (pp. 61-61).
Open this publication in new window or tab >>Electronic nose to detect off-flavor of drinking water
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2014 (English)In: , 2014, p. 61-61Conference paper, Published paper (Refereed)
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:hig:diva-20552 (URN)
Conference
Proc. 12th Congresso Nazionale Società Italiana di Biofísica Pura e Applicata (SIBPA)
Available from: 2015-11-03 Created: 2015-11-03 Last updated: 2018-03-13Bibliographically approved
Ferrer-Coll, J., Slimane, B., Chilo, J. & Stenumgaard, P. (2014). Impulsive noise detection in OFDM systems with PAPR reduction. In: 2014 International symposium on electromagnetic compatibility (EMC Europe): . Paper presented at 2014 International Symposium on Electromagnetic Compatibility, EMC Europe 2014; Gothenburg, Sweden; 1-4 September 2014 (pp. 523-527). IEEE conference proceedings
Open this publication in new window or tab >>Impulsive noise detection in OFDM systems with PAPR reduction
2014 (English)In: 2014 International symposium on electromagnetic compatibility (EMC Europe), IEEE conference proceedings, 2014, p. 523-527Conference paper, Published paper (Refereed)
Abstract [en]

Impulsive noise is a major source of degradation in industrial communications. Orthogonal frequency-division multiplexing (OFDM) is an extended technique used in many industrial communications, however the performance of OFDM systems is reduced under an impulsive noise source. To increase the system performance, impulsive noise detection and suppression techniques can be designed in the communication system. OFDM has high levels of peak-to-average power ratio (PAPR), thus PAPR reduction techniques, such as selected mapping (SLM), are implemented in OFDM systems. This paper proposes an impulsive noise detection exploiting the statistical properties of the OFDM envelope when applying SLM. The proposed detection technique increases the probability of detection and improves the BER of the communication system compared to other impulsive detection techniques.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2014
Series
IEEE International Symposium on Electromagnetic Compatibility, ISSN 2158-110X
Keywords
Impulsive noise; impulsive noise detection; OFDM; PAPR; selected mapping(SLM); wireless communications
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:hig:diva-17471 (URN)10.1109/EMCEurope.2014.6930962 (DOI)000364988600097 ()2-s2.0-84908673096 (Scopus ID)978-1-4799-3226-9 (ISBN)
Conference
2014 International Symposium on Electromagnetic Compatibility, EMC Europe 2014; Gothenburg, Sweden; 1-4 September 2014
Projects
EMI
Available from: 2014-09-08 Created: 2014-09-08 Last updated: 2018-03-13Bibliographically approved
Savic, V., Ferrer-Coll, J., Ängskog, P., Chilo, J., Stenumgaard, P. & Larsson, E. G. (2013). An experimental study of ranging techniques in a tunnel environment. In: : . Paper presented at TAMSEC 2013, National Symposium on Technology and Methodology for Security and Crisis Management, 13-14 November 2013, Stockholm, Sweden (pp. 34).
Open this publication in new window or tab >>An experimental study of ranging techniques in a tunnel environment
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2013 (English)Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a preliminary experimental analysis of the ranging techniques using UWB measurements obtained in a tunnel at Linköping university. According to our results, range estimates based on time-of-arrival are very accurate in LOS and all NLOS scenarios with thin obstacles. However, there is a relatively large bias when a NLOS is caused by a tunnel wall.

National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:hig:diva-15797 (URN)
Conference
TAMSEC 2013, National Symposium on Technology and Methodology for Security and Crisis Management, 13-14 November 2013, Stockholm, Sweden
Available from: 2013-11-26 Created: 2013-11-26 Last updated: 2018-12-03Bibliographically approved
Ferrer-Coll, J., Ängskog, P., Elofsson, C., Chilo, J. & Stenumgaard, P. (2013). Antenna Cross Correlation and Ricean K-Factor Measurements in Indoor Industrial Environments at 433 and 868 MHz. Wireless personal communications, 73(3), 587-593
Open this publication in new window or tab >>Antenna Cross Correlation and Ricean K-Factor Measurements in Indoor Industrial Environments at 433 and 868 MHz
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2013 (English)In: Wireless personal communications, ISSN 0929-6212, E-ISSN 1572-834X, Vol. 73, no 3, p. 587-593Article in journal (Refereed) Published
Abstract [en]

The Ricean K-factor and antenna diversity properties for indoor industrial environments have been characterized for 433 and 868 MHz. The high amount of metallic structures gives a multipath environment that heavily differs from other environments e.g. indoor office environments. The results show that low correlation between receiving antennas can be achieved for shorter antenna distances than in other environments.

Place, publisher, year, edition, pages
Springer, 2013
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Telecommunications
Identifiers
urn:nbn:se:hig:diva-14396 (URN)10.1007/s11277-013-1204-y (DOI)000327861700013 ()2-s2.0-84890552792 (Scopus ID)
Projects
EMI
Available from: 2013-06-10 Created: 2013-06-10 Last updated: 2018-03-13Bibliographically approved
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