Year 2023

• Fast Calibration-Free Single-Anchor Indoor Localization Based on Limited Number of ESPAR Antenna Radiation Patterns

  Publication

  • M. Groth
  • K. Nyka
  • Ł. Kulas

  - Year 2023

  — In this article, we investigate how the calibrationfree single-anchor indoor localization algorithm developed for base stations equipped with electronically steerable parasitic array radiator (ESPAR) antennas can further be improved. By reducing the total number of ESPAR antenna radiation patterns used in localization process, one can significantly reduce the time needed for an object localization. Performed localization measurements...

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• Wireless Body Area Network for Preventing Self-Inoculation Transmission of Respiratory Viral Diseases

  Publication

  • Ł. Pawlicki
  • A. Fotyga
  • J. Rewieński
  • M. Groth
  • Ł. Kulas
  • G. Fotyga

  - SENSORS - Year 2023

  This paper proposes an idea of Wireless Body Area Networks (WBANs) based on Bluetooth Low-Energy (BLE) standards to recognize and alarm a gesture of touching the face, and in effect, to prevent self-inoculation of respiratory viral diseases, such as COVID-19 or influenza A, B, or C. The proposed network comprises wireless modules placed in bracelets and a necklace. It relies on the received signal strength indicator (RSSI) measurements...

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Year 2022

• Innowacyjny system do lokalizacji zasobów dla poprawy efektywności i bezpieczeństwa w służbie zdrowia

  Publication

  • M. Rzymowski
  • M. Groth
  • K. Nyka
  • Ł. Kulas

  - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Year 2022

  Przedstawiono innowacyjne podejście do lokalizacji wewnątrzbudynkowej, które może zostać wykorzystane do podniesienia bezpieczeństwa i efektywności w służbie zdrowia. Opiera się ono na stacjach bazowych pracujących w standardzie Bluetooth Low Energy (BLE), wykorzystujących dedykowany moduł bezprzewodowy. zawierający układ scalony Nordic Semiconductor nRF5284 oraz na antenach rekonfigurowalnych, w których możliwe jest elektryczne...

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Year 2021

• Calibration-Free Single-Anchor Indoor Localization Using an ESPAR Antenna

  Publication

  • M. Groth
  • K. Nyka
  • Ł. Kulas

  - SENSORS - Year 2021

  In this paper, we present a novel, low-cost approach to indoor localization that is capable of performing localization processes in real indoor environments and does not require calibration or recalibration procedures. To this end, we propose a single-anchor architecture and design based on an electronically steerable parasitic array radiator (ESPAR) antenna and Nordic Semiconductor nRF52840 utilizing Bluetooth Low Energy (BLE)...

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Year 2020

• ESPAR Antenna-Based WSN Node With DoA Estimation Capability

  Publication

  • M. Groth
  • M. Rzymowski
  • K. Nyka
  • Ł. Kulas

  - IEEE Access - Year 2020

  In this paper, we present a low-cost energy-efficient electronically steerable parasitic array radiator (ESPAR) antenna-based wireless sensor network (WSN) node designed for IEEE 802.15.4 standard that is capable of performing direction of arrival (DoA) estimation in real-life outdoor environments. To this end, we propose the WSN node architecture, design and realization that utilizes NXP JN5168 radio frequency (RF) wireless transceiver...

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Year 2019

• Improved RSS-Based DoA Estimation Accuracy in Low-Profile ESPAR Antenna Using SVM Approach

  Publication

  • M. Tarkowski
  • M. Burtowy
  • M. Rzymowski
  • K. Nyka
  • M. Groth
  • Ł. Kulas

  - Year 2019

  In this paper, we have shown how the overall performance of direction-of-arrival (DoA) estimation using lowprofile electronically steerable parasitic array radiator (ESPAR) antenna, which has been proposed for Internet of Things (IoT) applications, can significantly be improved when support vector machine (SVM) approach is applied. Because the SVM-based DoA estimation method used herein relies solely...

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• Improved RSS-Based DoA Estimation Accuracy in Low-Profile ESPAR Antenna Using SVM Approach

  Publication

  • M. Tarkowski
  • M. Burtowy
  • M. Rzymowski
  • K. Nyka
  • M. Groth
  • Ł. Kulas

  - Year 2019

  In this paper, we have shown how the overall performance of direction-of-arrival (DoA) estimation using lowprofile electronically steerable parasitic array radiator (ESPAR) antenna, which has been proposed for Internet of Things (IoT) applications, can significantly be improved when support vector machine (SVM) approach is applied. Because the SVM-based DoA estimation method used herein relies solely on received signal strength...

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Year 2018

• Accurate PPCC-Based DoA Estimation Using Multiple Calibration Planes for WSN Nodes Equipped with ESPAR Antennas

  Publication

  • M. Groth
  • Ł. Kulas

  - Year 2018

  In this paper, we have introduced a new direction-of-arrival (DoA) estimation method, which relies on received signal strength (RSS) values measured at the output port of electronically steerable parasitic array radiator (ESPAR) antenna and uses the power pattern cross-correlation (PPCC) estimator. In the method, we have successfully incorporated measurements of ESPAR antenna's radiation patterns performed at multiple calibration...

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• Efficient RSS-Based DoA Estimation for ESPAR Antennas Using Multiplane SDR Calibration Approach

  Publication

  • M. Groth
  • L. Leszkowska
  • Ł. Kulas

  - Year 2018

  In this paper, we have introduced a new method to improve overall efficiency of direction-of-arrival (DoA) estimation scheme relying on received signal strength (RSS) values measured at the output port of electronically steerable parasitic array radiator (ESPAR) antenna. The proposed approach uses software-defined radio (SDR) setup and power pattern cross-correlation (PPCC) estimator involving multiple calibration planes. By placing...

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• Investigation of continuous wave jamming in an IEEE 802.15.4 network

  Publication

  • J. Rewieński
  • M. Groth
  • Ł. Kulas
  • K. Nyka

  - Year 2018

  This paper presents how continuous wave jamming affects IEEE 802.15.4 network. To this end, an office-based measurement setup has been proposed. Within the measurement area, 25 nodes have been set up in order to create a IEEE 802.15.4 tree-based test network structure. A dedicated jamming device that generates and transmits a continuous wave signal has been developed. Several tests have been conducted and presented to demonstrate...

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• Investigation of Continuous Wave Jamming in an IEEE 802.15.4 Network

  Publication

  • J. Rewieński
  • M. Groth
  • Ł. Kulas
  • K. Nyka

  - Year 2018

  This paper presents how continuous wave jamming affects IEEE 802.15.4 network. To this end, an office-based measurement setup has been proposed. Within the measurement area, 25 nodes have been set up in order to create a IEEE 802.15.4 tree-based test network structure. A dedicated jamming device that generates and transmits a continuous wave signal has been developed. Several tests have been conducted and presented to demonstrate...

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• RSS-Based DoA Estimation Using ESPAR Antenna Radiation Patterns Spline Interpolation

  Publication

  • M. Groth
  • K. Nyka
  • Ł. Kulas

  - Year 2018

  In this paper, it is shown how power pattern crosscorrelation (PPCC) algorithm, which relies on received signal strength (RSS) values recorded at electronically steerable parasitic array radiator (ESPAR) antenna output port, used for direction-of-arrival (DoA) estimation, can easily be improved by applying spline interpolation to radiation patterns recorded in the calibration phase of the DoA estimation process. The proposed method...

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