Wyniki wyszukiwania dla: MULTIPITCH ANALYSIS

• An Analysis of Probe-Fed Rectangular Patch Antennas With Multilayer and Multipatch Configurations on Cylindrical Surfaces

  Publikacja

  • R. Lech
  • W. Marynowski
  • A. Kusiek
  • J. Mazur

  - IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION - Rok 2014

  A multi-patch configuration of probe-fed rectangular microstrip antennas mounted on a cylindrical body, with electrically small radius, with an arbitrary number of substrate and superstrate layers is investigated in this paper. A full-wave analysis and a moment-method calculation are employed. A unified procedure for creating proper matrices for the investigated geometry of the structure is outlined here. Numerical results for...

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• An Analysis of Elliptical-Rectangular Multipatch Structure on Dielectric-Coated Confocal and Nonconfocal Elliptic Cylinders

  Publikacja

  • R. Lech
  • W. Marynowski
  • A. Kusiek

  - IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION - Rok 2015

  A rigorous analysis of the resonance frequency problem of an elliptical-rectangular microstrip structure mounted on dielectric-coated elliptic conducting cylinder, with electrically small radius, is investigated in this paper. A full-wave analysis and a moment-method calculation are employed. The analysis is carried out considering the expansion of the field as a series of Mathieu functions. The complex resonance frequencies of...

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• ENGINEERING FAILURE ANALYSIS

  Czasopisma

  ISSN: 1350-6307 , eISSN: 1873-1961

• Multipath Complex Root Tracing

  Publikacja

  • S. Dziedziewicz
  • M. Warecka
  • R. Lech
  • P. Kowalczyk

  - Rok 2022

  The problem of multipath root tracing is being addressed in this communication. The self-adaptive complex root tracing algorithm, which was previously utilized for the investigation of various propagation and radiation problems, is analyzed here for the cases when the traced characteristic bifurcates. A procedure of multiroute detection is proposed and demonstrated on the coaxially loaded cylindrical waveguide example.

• Hyperbolic position location estimation in the multipath propagation environment

  Publikacja

  • J. Stefański

  - Rok 2009

  The efficiency analysis a hyperbolic position location estimation in the multipath propagation environment in the wideband code division multiple access (WCDMA) interface was presented. Four, the most popular methods: Chan's, Foy's, Fang's and Friedlander's were considered. These algorithms enable the calculation of the geographical position of a mobile station (MS) using the time differences of arrival (TDOA) between several base...

• Resonance Frequency Calculation of a Multilayer and Multipatch Spherical Microstrip Structure Using a Hybrid Technique

  Publikacja

  • A. Kusiek
  • R. Lech

  - IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION - Rok 2016

  This communication offers a rigorous analysis of the resonance frequency problem of a spherical microstrip structure mounted on a multilayer, dielectric-coated metallic sphere, with an electrically small radius. The structure consists of single or multiple metallic patches with arbitrary shapes. A full-wave analysis is employed with the use of proposed hybrid approach, combining the finite-difference technique with a spectral domain...

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• Shallow-Water Acoustic Communications in Strong Multipath Propagation Conditions

  Publikacja

  • I. Kochańska
  • A. Schmidt
  • J. Schmidt

  - Rok 2024

  A phenomenon that has a strong impact on signal transmission conditions in Underwater Acoustic Communication (UAC) systems is multipath propagation. As a result of multipath propagation, the transmitted signal undergoes time dispersion which results in inter-symbol interference observed on the receiving side. Time dispersion is large, especially in horizontal channels in shallow waters which significantly limits the transmission...

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• Reduction of the Multipath Propagation Effect in a Hydroacoustic Channel Using Filtration in Cepstrum

  Publikacja

  • A. Czapiewska
  • A. Łuksza
  • R. Studański
  • A. Żak

  - SENSORS - Rok 2020

  During data transmission in a hydroacoustic channel, one of the problems is the multipath propagation effect, which leads to a decrease in the transmission parameters and sometimes completely prevents it. Therefore, we have attempted to develop a method, which is based on a recorded hydroacoustic signal, that allows us to recreate the original (generated) signal by eliminating the multipath effect. In our method, we use cepstral...

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• Robustified estimators of radar elevation angle using a specular multipath model

  Publikacja

  • M. Meller
  • K. Stawiarski

  - IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS - Rok 2019

  We consider the problem of estimating the elevation angle in the presence of multipath. The proposed method belongs to the class of maximum likelihood-like estimators and employs a modified specular reflection model that accounts for the uncertainty of the steering vector by assuming that they are subject to unknown deterministic perturbations with bounded norms. The analysis, performed using convex optimization methods, allows...

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• Analysis

  Czasopisma

  ISSN: 0003-2638 , eISSN: 1467-8284