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Directional Modulation for Compact Devices [PDF]
IEEE Antennas and Wireless Propagation Letters, 2017 A new directional modulation system which uses radiation pattern data for modulation encoding is proposed. The approach allows compact multiport antennas (e.g. MIMO capable antennas) to be used for directional modulation, replacing extensive arrays.
Adam Narbudowicz +2 more
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Direct Projective Modules, Direct Injective Modules, and their Generalizations
Journal of Mathematical Sciences, 2021zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Abyzov A.N. +3 more
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Spatial and directional modulation with scrambling
Physical Communication, 2019Abstract In this paper, a novel spatial and directional modulation scheme with scrambling (SDM-S) is proposed toward secure wireless transmission. Compared to the conventional directional modulation scheme with cooperative receivers (DM-CR), the proposed SDM-S scheme is capable of increasing the throughput without degrading the secrecy performance ...
Yanping Xiao
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Lobachevskii Journal of Mathematics, 2022
The abstract of this paper gives a good idea of its content: ``In this paper, we study the class of modules having the property that if any pure submodule is isomorphic to a direct summand of such a module then the pure submodule is itself a direct summand. These modules are termed as pure-direct-injective modules (or pure-C2 modules).
Maurya, Sanjeev Kumar +2 more
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The abstract of this paper gives a good idea of its content: ``In this paper, we study the class of modules having the property that if any pure submodule is isomorphic to a direct summand of such a module then the pure submodule is itself a direct summand. These modules are termed as pure-direct-injective modules (or pure-C2 modules).
Maurya, Sanjeev Kumar +2 more
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Boletín de la Sociedad Matemática Mexicana, 2015
Let \(R\) be an associative ring with an identity element. A unital right \(R\)-module \(M\) is called ADS* if for any direct summand \(N\) of \(M\) and any supplement \(K\) of \(N\) in \(M\) one has \(M=N\oplus K\). The aim of this paper is to investigate direct sums of ADS* modules. First, the authors provide a bunch of examples of ADS* modules whose
KESKİN TÜTÜNCÜ, DERYA +2 more
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Let \(R\) be an associative ring with an identity element. A unital right \(R\)-module \(M\) is called ADS* if for any direct summand \(N\) of \(M\) and any supplement \(K\) of \(N\) in \(M\) one has \(M=N\oplus K\). The aim of this paper is to investigate direct sums of ADS* modules. First, the authors provide a bunch of examples of ADS* modules whose
KESKİN TÜTÜNCÜ, DERYA +2 more
openaire +3 more sources
Direct Imaging of Charge Modulation
Physical Review Letters, 1996Electron diffraction calculation suggest that a modulation in the density of valence electrons may dominate the images of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} under certain experimental conditions. This prediction is supported by electron microscope experiments where we observe modulation that we attribute to charge transfer over a distance of
, Zhu, , Tafto
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Specification directed module testing
IEEE Transactions on Software Engineering, 1986The testing techniques described in this paper apply to the testing of abstract data types (modules, packages). The techniques utilize information generated during refinement of a data type, such as the data type invariant and the relationship between the specification and implementation states; this information is used to specify parts of the code to ...
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Direct system and direct limit of \(H_v\)-modules.
2004zbMATH Open Web Interface contents unavailable due to conflicting licenses.
GHADIRI, M., DAVVAZ, B.
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Communications in Algebra, 2000
Let A be an artin algebra. An indecomposable A-module M is called weakly directing if it does not belong to a cycle of nonzero nonisomorphisms between indecomposable modules from the same component of . This paper deals with weakly directing modules. We investigate the distinctions and connections between weakly directing modules and directing modules.
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Let A be an artin algebra. An indecomposable A-module M is called weakly directing if it does not belong to a cycle of nonzero nonisomorphisms between indecomposable modules from the same component of . This paper deals with weakly directing modules. We investigate the distinctions and connections between weakly directing modules and directing modules.
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Acta Mathematica Sinica, 1993
Direct injective modules were defined by W. K. Nicholson in 1976. An \(R\)- module \(M\) is said to be direct injective if given a direct summand \(N\) of \(M\) with inclusion \(i: N\to M\) and any monomorphism \(g: N\to M\), there exists an endomorphism \(f\) of \(M\) such that \(fg=i\).
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Direct injective modules were defined by W. K. Nicholson in 1976. An \(R\)- module \(M\) is said to be direct injective if given a direct summand \(N\) of \(M\) with inclusion \(i: N\to M\) and any monomorphism \(g: N\to M\), there exists an endomorphism \(f\) of \(M\) such that \(fg=i\).
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