Zobrazeno 1 - 10
of 5 054
pro vyhledávání: '"Direction finding"'
Publikováno v:
Zhongguo Jianchuan Yanjiu, Vol 19, Iss 4, Pp 282-289 (2024)
ObjectiveTo overcome the problem of the limitation of working bandwidth due to the phase ambiguity caused by the carrier frequency's variation in conventional time-modulated direction finding, a single-channel direction finding method with nonuniform
Externí odkaz:
https://doaj.org/article/8f25c3ca416048c588fee158ed0e3ada
Publikováno v:
Advanced Engineering Research, Vol 24, Iss 2, Pp 198-206 (2024)
Introduction. Safety of navigation and development of underwater mineral deposits require the accurate detection of various underwater objects. The literature discusses the issues of tracking their motion and trajectory. Sonar methods are proposed to
Externí odkaz:
https://doaj.org/article/f79fdf22af204b4ba3b94f39b4c4a66f
Autor:
Nurzhigit Smailov, Vitaliy Tsyporenko, Akezhan Sabibolda, Valentyn Tsyporenko, Askar Abdykadyrov, Assem Kabdoldina, Zhandos Dosbayev, Zhomart Ualiyev, Rashida Kadyrova
Publikováno v:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, Vol 14, Iss 3 (2024)
This study investigated a search-free digital method for radio direction-finding that utilizes spatial analytical signal reconstruction. The research focused on optimizing the method's accuracy for estimating the direction of a radio source. The anal
Externí odkaz:
https://doaj.org/article/bdc7356c51284e1493c5741a2a8c0540
Publikováno v:
Hangkong bingqi, Vol 31, Iss 1, Pp 71-76 (2024)
In the ground attack mission, the attack plan needs to be formulated and distributed to the attack aircraft based on the threat source intelligence data obtained in advance with the help of the tactical mission planning system. The passive radar reco
Externí odkaz:
https://doaj.org/article/ac676ddf77294565b22ef534c4f4eeae
Publikováno v:
Hangkong bingqi, Vol 31, Iss 1, Pp 103-110 (2024)
The spatially synthesized signal pulse of the frequency division orthogonal MIMO radar has the characteristics of time-varying envelope and space-time coupling, which provides a new possibility for actively countering direction finding of the passive
Externí odkaz:
https://doaj.org/article/77603bb71b454aff86d2006759adb6ba
Publikováno v:
IEEE Access, Vol 12, Pp 157218-157226 (2024)
In this work, we evaluate the efficiency of different one-dimensional and two-dimensional multiple signal classification (MUSIC) scenarios in direction-finding (DF) for the azimuth and the elevation angles through the Monte Carlo simulations. In addi
Externí odkaz:
https://doaj.org/article/49e7a9f331a4499f8f6fc49064fbd14d
Publikováno v:
IEEE Access, Vol 12, Pp 138610-138616 (2024)
This paper proposes a compact ultra-wideband (UWB) direction-finding antenna with a single-radiator multiple-port (SRMP) design. The proposed antenna consists of a single-radiator, self-decoupling feed structure (SDFS), and via walls considering the
Externí odkaz:
https://doaj.org/article/f81f4b5ad5094fa0a25b1cf4cc5e0444
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 5, Iss 5, Pp 1403-1413 (2024)
This paper proposes an ultra-wideband frequency-invariant beamforming (FIB) using a generalized nesting array. To implement ultra-wideband (9:1 bandwidth ratio) FIB with a reduced number of array elements, the target frequency band is divided into su
Externí odkaz:
https://doaj.org/article/ca69450313cf48c0adf5077fa6fe18c3
Autor:
Miguel Poveda-Garcia, Jose Antonio Lopez-Pastor, Maria Campo-Valera, Alejandro Gil-Martinez, David Canete-Rebenaque, Jose Luis Gomez-Tornero
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 5, Iss 5, Pp 1181-1192 (2024)
A compact antenna design is proposed to synthesize two-dimensional amplitude monopulse radiation patterns, with application to integrated sensing and communications in the ISM 2.4 GHz band. The antenna makes use of two air-filled leaky waveguides to
Externí odkaz:
https://doaj.org/article/f3fce0a8d06a4a3cb1e714a2f77e7d83
Autor:
Ottavio Crisafulli, Nicolo Ivan Piazzese, Santi Concetto Pavone, Giuseppe Giammello, Giovanni Galvagna, Salvatore Pitrulli, Andrea Francesco Morabito, Loreto Di Donato, Michele Sardo, Gino Sorbello
Publikováno v:
IEEE Access, Vol 12, Pp 42572-42584 (2024)
The introduction of new Direction finding (DF) features in Bluetooth Low Energy (BLE) 5.1, has brought about new hardware design requirements for locators. These requirements include the ability to support accurate and fast direction-finding algorith
Externí odkaz:
https://doaj.org/article/c04731cc9a48427db9dd7034b750ee68