Contra-directional coupling into slotted photonic crystals for spectrometric applications [PDF]
, 2014 We propose and demonstrate the concept of a contra-directional coupler between a W1 and a slotted photonic crystal waveguide. The bandwidth and operating wavelength of such a coupler can be controlled via its geometrical parameters, and power transfer is
Krauss, T.F. +5 more
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Robust Beamforming Design for Secure DM-Based Relay Networks With Self-Sustained Jammers
IEEE Access, 2019 In this paper, we propose to use self-sustained jammers to generate artificial noise with the aim of enhancing the physical layer security of a directional modulation (DM) relay system.
Xiaobo Zhou +4 more
doaj +1 more source
Journal of Algebra, 1992 Directing modules play an important role in the representation theory of algebras. They have many good properties, for example, they are determined by their composition factors. Let \(A\) be an Artin algebra. Following \textit{C. M. Ringel} [Tame algebras and integral quadratic forms, (Lect. Notes Math.
Skowroński, Andrzej, Smalø, Sverre O
openaire +2 more sources
Directional: A library for Directional Field Synthesis, Design, and Processing
, 2021 Directional: A library for Directional Field Synthesis, Design, and ...
Amir Vaxman and others
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Design of OAM Beam Directional Modulation Signal in Communication and Guidance Integration [PDF]
Radioengineering, 2020 An orbital angular momentum directional modulation (OAM-DM) signal is proposed for communication and guidance integration. This signal is transmitted by a uniform circular antenna array (UCA). We divide the array into odd and even antenna groups.
C. Zhu, M. Song, X. Dang
doaj
Directional modulation techniques for secure wireless communication: a comprehensive survey
EURASIP Journal on Wireless Communications and Networking, 2022 Directional Modulation (DM) techniques provide wireless communication security against passive eavesdropping by means of specific physical layer characteristics.
Omar Ansari, Muhammad Amin
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Robust Synthesis Scheme for Secure Multi-Beam Directional Modulation in Broadcasting Systems
IEEE Access, 2016 Recently, directional modulation has become an active research area in wireless communications due to its security. Unlike existing research work, we consider a multi-beam directional modulation (MBDM) scenario with imperfect desired direction knowledge.
Feng Shu +4 more
doaj +1 more source
Directional amplitude backscatter modulation with suppressed Doppler based on rotating resonant loop
Scientific Reports, 2022 The directional amplitude backscatter modulation with suppressed Doppler is demonstrated based on the scattering from a symmetrically rotating resonant loop. The concept is studied theoretically and experimentally with perfectly compatible results.
Ashkan Azarfar +2 more
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DFT-Based Multi-Directions Directional Modulation
IEEE Wireless Communications Letters, 2019 In this letter, a physically secure multi-directions directional modulation scheme is proposed. The scheme provides an adaptive beam-width assignment, where each user is granted a different beam width based on its channel condition. The scheme can be efficiently implemented using a discrete Fourier transform (DFT)-based algorithm that divides the ...
Mohammed Hafez +2 more
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Sparse Antenna Array Based Positional Modulation Design With a Low-Complexity Metasurface
IEEE Access, 2020 Positional modulation (PM) has been introduced recently where a given modulation pattern can only be received at certain desired positions. To achieve it, the multi-path effect is exploited for positional modulation with the aid of metasurface acting as ...
Bo Zhang +9 more
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