Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Amr H. Hussein"'
Publikováno v:
EURASIP Journal on Wireless Communications and Networking, Vol 2024, Iss 1, Pp 1-14 (2024)
Abstract This paper presents a Highly Isolation open-loop resonators (OLR)—based microstrip full-duplex Tx/Rx antenna systems with low insertion loss for contemporary wireless system applications. Through a T-junction combiner, the proposed diplexe
Externí odkaz:
https://doaj.org/article/cf1a1b1cbc1146a5ba95936c4ece7865
Autor:
Rania H. Elabd, Amr H. Hussein
Publikováno v:
EURASIP Journal on Wireless Communications and Networking, Vol 2023, Iss 1, Pp 1-22 (2023)
Abstract This paper presents a novel design of a compact, wideband tunable microstrip filtenna system for effective spectrum sensing in cognitive radio (CR) applications. The proposed filtenna structure has a total bandwidth of $$1.63\,\text{GHz}$$ 1
Externí odkaz:
https://doaj.org/article/81c676ca356347acb7346f96678074e5
Publikováno v:
Alexandria Engineering Journal, Vol 61, Iss 9, Pp 7233-7264 (2022)
In this paper, a new hybrid beamforming approach based on the 2D convolution and genetic algorithm (GA), denoted as C/GA, is proposed for side lobe level (SLL) reduction and size miniaturization of planar antenna arrays (PAA). The convolution algorit
Externí odkaz:
https://doaj.org/article/9497e993e2d84508a944b66e9c6ebdd7
Publikováno v:
Alexandria Engineering Journal, Vol 61, Iss 8, Pp 5903-5917 (2022)
In this paper, a new optimized quadrant pyramid antenna array (O-QPAA) structure is proposed for back lobe minimization of planar antenna arrays (PAA). Based on the PAA size, it is thought to be formed of a number of concentric co-planar squared ante
Externí odkaz:
https://doaj.org/article/be7eff20118e467aa77fdf87aa24b469
Publikováno v:
Alexandria Engineering Journal, Vol 61, Iss 8, Pp 5983-5999 (2022)
Spectrum sensing (SS) is substantial demand for enabling cognitive radio (CR) systems. In recent years, digital beamforming (DBF) is exploited for performance enhancement of multiple antenna elements or uniform linear array (ULA) based spectrum sensi
Externí odkaz:
https://doaj.org/article/42e8a4ea0ac14b338948463572551f92
Publikováno v:
Alexandria Engineering Journal, Vol 61, Iss 6, Pp 4623-4645 (2022)
The presence of array back lobe is a major source of interference, power loss, and degrades the signal-to-interference ratio (SIR) in wireless communication systems. In this paper, new distributed beamforming techniques based on an optimized elliptic
Externí odkaz:
https://doaj.org/article/216a9cd266a7495492e4723d279082d6
Publikováno v:
Sensors, Vol 23, Iss 14, p 6557 (2023)
In this paper, two sector beam scanning approaches (BSAs) based on element position perturbations (EPPs) in the azimuth plane are introduced. In EPP-BSA, the elements’ excitations are kept constant and the elements’ positions in the direction nor
Externí odkaz:
https://doaj.org/article/25a232e921064e65864905598a3b3b58
Publikováno v:
IEEE Access, Vol 8, Pp 170618-170634 (2020)
Compressed sensing (CS) represents an efficient framework to simultaneously acquire and compress images/signals while reducing acquisition time and memory requirements to process or transmit them. Specifically, CS is able to recover an image from a r
Externí odkaz:
https://doaj.org/article/f1f50644608f4b7e8a6aba9dbaf4eae7
Publikováno v:
Engineering Science and Technology, an International Journal, Vol 20, Iss 3, Pp 965-972 (2017)
Side lobe level (SLL) reduction has a great importance in recent communication systems. It is considered as one of the most important applications of digital beamforming since it reduces the effect of interference arriving outside the main lobe. This
Externí odkaz:
https://doaj.org/article/ad4633bb516e4033888b8b1926ca7e3b
Publikováno v:
2022 International Telecommunications Conference (ITC-Egypt).