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Katedra Systemów i Sieci Radiokomunikacyjnych

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Rok 2024
  • A Selection of Starting Points for Iterative Position Estimation Algorithms Using Feedforward Neural Networks
    Publikacja

    This article proposes the use of a feedforward neural network (FNN) to select the starting point for the first iteration in well-known iterative location estimation algorithms, with the research objective of finding the minimum size of a neural network that allows iterative position estimation algorithms to converge in an example positioning network. The selected algorithms for iterative position estimation, the structure of the...

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  • A simplified channel estimation procedure for NB-IoT downlink
    Publikacja

    - Rok 2024

    This paper presents a low-complexity channel estimation procedure which is suitable for use in energy-efficient NB-IoT user equipment devices. The procedure is based on the well-established least squares scheme, followed by linear interpolation in the time domain and averaging in the frequency domain. The quality of channel estimation vs. signal-to-noise ratio is evaluated for two channel models and compared with the performance...

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  • Hybrid Laboratory of Radio Communication With Online Simulators and Remote Access

    Contribution: Two toolsets for the remote teaching of radio communication laboratory classes: 1) online simulators for individual work of students and 2) a remote access system to laboratory workstations for group work. Initial assumptions and method of implementation of both tools are presented. Background: The COVID-19 pandemic has forced a change in teaching at all levels of education. The specificity of practical classes, such...

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Rok 2023
Rok 2022
Rok 2021
  • A Method for Underwater Wireless Data Transmission in a Hydroacoustic Channel under NLOS Conditions
    Publikacja

    - SENSORS - Rok 2021

    Wireless data transmission in the hydroacoustic channel under non-line-of-sight (NLOS) propagation conditions, for example, during a wreck penetration, is difficult to implement reliably. This is mostly due to the multipath propagation, which causes a reduction in the quality of data reception. Therefore, in this work an attempt has been made to develop a reliable method of wireless underwater communication test it under the NLOS...

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