Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Premysl Janu"'
Publikováno v:
IEEE Access, Vol 12, Pp 29024-29034 (2024)
The article is mainly devoted to the analysis of the transient process during the phase change of the intra-impulse modulated signal of the system, which is composed of a pair of piezoelectric ceramic transducers. In the introductory part, this artic
Externí odkaz:
https://doaj.org/article/cad8c63d63284ba881831cf3877ed36d
Publikováno v:
SN Applied Sciences, Vol 5, Iss 7, Pp 1-18 (2023)
Abstract The main aim of this review is to describe in detail an advanced technique to detect and estimate the prior unknown parameters of intra-pulse modulated signals and the verification with typical radar signals. The method is approved for detec
Externí odkaz:
https://doaj.org/article/cf5b14c926b94917b1dcb6779a8e1c59
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 19, Iss 3, Pp 222-230 (2021)
The pulse with intra-pulse modulation plays an important role in the design of radar systems. The first class of the signals type is the linear frequency modulation technique. The linear frequency modulation is used to resolve range resolution proble
Externí odkaz:
https://doaj.org/article/7c7349212e67471a8a3266c619023695
Publikováno v:
Sensors, Vol 22, Iss 9, p 3203 (2022)
In this paper, a new method for detecting and estimating the parameters of a binary phase shift keying (BPSK) signal, based on a cross-correlation function, is proposed. The proposed method consists of two stages. The first stage is used to detect or
Externí odkaz:
https://doaj.org/article/4efede5fd912479a94fd85383620cce5
Publikováno v:
2022 International Symposium ELMAR.
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 68(4)
Ultrasonic time-of-flight (ToF) measurement is commonly used in a variety of scenarios when using small bandwidth ultrasonic transducers with 40-kHz central frequency. With these transducers, the threshold detection technique is commonly implemented,
Autor:
Sang Van Doan, Premysl Janu
Publikováno v:
Periodica Polytechnica Transportation Engineering. 47:25-28
One of the most important systems of an aircraft jet engine is exhaust gas temperature measurement system that ensure right function of the engine. Temperature of the gas flowing from the engine turbine is quite high. There is one way, how to measure
Publikováno v:
2019 International Conference on Military Technologies (ICMT).
The paper is dedicated to the issue of temperature variation influence on the characteristics of piezoceramic transducer to verify its possible use in extreme temperature conditions in specific applications e. g. military, aerospace, etc. The paper p
Autor:
Miroslav Popela, Jana Olivová, Zdeněk Plíva, Leoš Petržílka, Michaela Krchová, Zdeněk Joska, Přemysl Janů
Publikováno v:
Applied Sciences, Vol 14, Iss 4, p 1556 (2024)
This paper presents the manufacturing of a patch antenna using an advanced 3D printing technology called lights-out digital additive manufacturing (LDM). This 3D LDM printing technology is mainly used for printing circuit boards (PCBs); however, it h
Externí odkaz:
https://doaj.org/article/bb9bccde179e42aeba7444b75c012e32
Publikováno v:
2016 17th International Radar Symposium (IRS).
Direction finding (DF) system using phase interferometer of long baselines gives high accuracy of angle of arrival (AOA), however, it also involves phase ambiguity and phase error. The paper presents a measurement of phase interferometer system, whic