Search results for: MULTIPITCH ANALYSIS

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

  Publication

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

  - IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION - Year 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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• An Analysis of Probe-Fed Rectangular Patch Antennas With Multilayer and Multipatch Configurations on Cylindrical Surfaces

  Publication

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

  - IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION - Year 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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• ENGINEERING FAILURE ANALYSIS

  Journals

  ISSN: 1350-6307 , eISSN: 1873-1961

• Multipath Complex Root Tracing

  Publication

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

  - Year 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.

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• Hyperbolic position location estimation in the multipath propagation environment

  Publication

  • J. Stefański

  - Year 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

  Publication

  • A. Kusiek
  • R. Lech

  - IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION - Year 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

  Publication

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

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

  Publication

  • M. Meller
  • K. Stawiarski

  - IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS - Year 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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• Reduction of the Multipath Propagation Effect in a Hydroacoustic Channel Using Filtration in Cepstrum

  Publication

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

  - SENSORS - Year 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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• Analysis

  Journals

  ISSN: 0003-2638 , eISSN: 1467-8284

• PHYTOCHEMICAL ANALYSIS

  Journals

  ISSN: 0958-0344 , eISSN: 1099-1565

• Comparison of Doppler Effect Estimation Methods for MFSK Transmission in Multipath Hydroacoustic Channel

  Publication

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

  - IEEE Access - Year 2024

  Underwater wireless communication remains a challenging topic, particularly for applications such as wreck penetration where multipath and Doppler effects are very intense. These effects are becoming even more difficult to mitigate for fast data transmission systems that utilize wideband signals. Due to the low propagation speed of acoustic wave in the water, there is a significant difference between the Doppler shift for lower...

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• How can analysts use multicriteria decision analysis?

  Publication

  • M. Bystrzanowska
  • M. Tobiszewski

  - TRAC-TRENDS IN ANALYTICAL CHEMISTRY - Year 2018

  Proper decision making in multifacitated situation is very challenging task. It is especially difficult if there are many alternatives and criteria that are often contradictory. Analytical chemistry and related sciences involve many situations where decisions on complex problems are made. The support tools may be the use of MCDA (Multi-criteria Decision Analysis) algorithms. They formalize the decision process, make it transparent...

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• 15th Conference on Calorimetry and Thermal Analysis

  Events

  08-09-2024 16:30 - 12-09-2024 13:30

  Registration for the workshops with Sponsors, which will take place during the free time on Tuesday, September 10, 2024, from 2:30 PM, will be conducted by signing up on a list at the registration desk. We kindly inform you that posters should be prepared in size B1 (707 x 1000 mm). Templates:pptx, pdf Please submit your presentations...

• ANALYST

  Journals

  ISSN: 0003-2654 , eISSN: 1364-5528

• Multipath routing for quality of service differentiation and network capacity optimization in broadband low-earth orbit systems

  Publication

  • J. Jurski
  • J. Woźniak

  - Year 2009

  This paper shows the importance of employing multiple different paths for routing in Inter-Satellite Link (ISL) networks in broadband Low-Earth Orbit (LEO) satellite systems. A theoretical analysis is presented and a routing concept is proposed to demonstrate three facts that make multipath routing especially important in broadband LEO networks: (1) differences in the propagation delays have a much greater impact on end-to-end...

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• Music Analysis

  Journals

  ISSN: 0262-5245 , eISSN: 1468-2249

• ASYMPTOTIC ANALYSIS

  Journals

  ISSN: 0921-7134 , eISSN: 1875-8576

• Linguistic Analysis

  Journals

  ISSN: 0098-9053

• Bayesian Analysis

  Journals

  ISSN: 1931-6690 , eISSN: 1936-0975

• Decision Analysis

  Journals

  ISSN: 1545-8490 , eISSN: 1545-8504

• Analysis (Germany)

  Journals

  eISSN: 2196-6753

• Strategic Analysis

  Journals

  ISSN: 0970-0161 , eISSN: 1754-0054

• GEOGRAPHICAL ANALYSIS

  Journals

  ISSN: 0016-7363 , eISSN: 1538-4632

• Discrete Analysis

  Journals

  eISSN: 2397-3129

• Analysis and Metaphysics

  Journals

  ISSN: 1584-8574

• Tourism Analysis

  Journals

  ISSN: 1083-5423 , eISSN: 1943-3999

• Analysis & PDE

  Journals

  ISSN: 1948-206X

• POLITICAL ANALYSIS

  Journals

  ISSN: 1047-1987 , eISSN: 1476-4989

• Analysis and Applications

  Journals

  ISSN: 0219-5305 , eISSN: 1793-6861

• Analysis Mathematica

  Journals

  ISSN: 0133-3852 , eISSN: 1588-273X

• Journal of Analysis

  Journals

  ISSN: 0971-3611 , eISSN: 2367-2501

• RISK ANALYSIS

  Journals

  ISSN: 0272-4332 , eISSN: 1539-6924

• Data Analytics Meeting

  Events

  17-05-2024 08:30 - 18-05-2024 15:00

  Data Analytics Meeting Konferencja studentów i doktorantów

• ACCIDENT ANALYSIS AND PREVENTION

  Journals

  ISSN: 0001-4575 , eISSN: 1879-2057

• Performance of the Direct Sequence Spread Spectrum Underwater Acoustic Communication System with Differential Detection in Strong Multipath Propagation Conditions

  Publication

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

  - Archives of Acoustics - Year 2024

  The underwater acoustic communication (UAC) operating in very shallow-water should ensure reliable transmission in conditions of strong multipath propagation, significantly disturbing the received signal. One of the techniques to achieve this goal is the direct sequence spread spectrum (DSSS) technique, which consists in binary phase shift keying (BPSK) according to a pseudo-random spreading sequence. This paper describes the DSSS...

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• Logical Analysis and History of Philosophy / Philosophiegeschichte und logische Analyse

  Journals

  ISSN: 1617-3473

• Landform Analysis

  Journals

  ISSN: 1429-799X , eISSN: 2081-5980

• Image Analysis and Stereology

  Journals

  ISSN: 1580-3139

• COMMUNICATIONS IN ANALYSIS AND GEOMETRY

  Journals

  ISSN: 1019-8385 , eISSN: 1944-9992

• REAL ANALYSIS EXCHANGE

  Journals

  ISSN: 0147-1937 , eISSN: 1930-1219

• Behavior Analysis in Practice

  Journals

  ISSN: 1998-1929 , eISSN: 2196-8934

• Journal of Legal Analysis

  Journals

  ISSN: 1946-5319 , eISSN: 2161-7201

• Drug Testing and Analysis

  Journals

  ISSN: 1942-7603 , eISSN: 1942-7611

• Journal of Topology and Analysis

  Journals

  ISSN: 1793-5253 , eISSN: 1793-7167

• International Journal of Analysis

  Journals

  ISSN: 2314-498X , eISSN: 2314-4998

• Economic Analysis and Policy

  Journals

  ISSN: 0313-5926

• Journal of Logic and Analysis

  Journals

  ISSN: 1759-9008

• Annals of Functional Analysis

  Journals

  ISSN: 2008-8752

• Nonlinear Analysis Forum

  Journals

  ISSN: 1226-7228