Zobrazeno 1 - 10
of 2 347
pro vyhledávání: '"Pham, A. V."'
Autor:
Pham, K. -V.
It is shown that spin valves under suitable symmetry conditions exhibit an ON-OFF response to a spin battery. While a spin valve driven by a charge battery displays the usual GMR (Giant Magneto-Resistance), a pure spin current or pure spin accumulati
Externí odkaz:
http://arxiv.org/abs/2410.01013
This work proposes an efficient parallel algorithm for non-monotone submodular maximization under a knapsack constraint problem over the ground set of size $n$. Our algorithm improves the best approximation factor of the existing parallel one from $8
Externí odkaz:
http://arxiv.org/abs/2409.04415
This paper proposes a joint design of probabilistic constellation shaping (PCS) and precoding to enhance the sum-rate performance of multi-user visible light communications (VLC) broadcast channels subject to signal amplitude constraint. In the propo
Externí odkaz:
http://arxiv.org/abs/2408.02990
Autor:
Pham, Thanh V., Ishihara, Susumu
This paper studies a practical design of probabilistic constellation shaping (PCS) for physical layer security in visible light communications (VLC). In particular, we consider a wiretap VLC channel employing a probabilistically shaped $M$-ary pulse
Externí odkaz:
http://arxiv.org/abs/2408.02982
Autor:
Pham, Canh V.
In this work, we consider the Submodular Maximization under Knapsack (SMK) constraint problem over the ground set of size $n$. The problem recently attracted a lot of attention due to its applications in various domains of combination optimization, a
Externí odkaz:
http://arxiv.org/abs/2405.12252
Free-space optics (FSO)-based satellite communication systems have recently received considerable attention due to their enhanced capacity compared to their radio frequency (RF) counterparts. This paper analyzes the performance of physical layer secu
Externí odkaz:
http://arxiv.org/abs/2402.13554
There has been an increasing interest in physical layer security (PLS), which, compared with conventional cryptography, offers a unique approach to guaranteeing information confidentiality against eavesdroppers. In this paper, we study a joint design
Externí odkaz:
http://arxiv.org/abs/2402.13549
This paper studies energy-efficient precoding designs for multi-user visible light communication (VLC) systems from the perspective of physical layer security where users' messages must be kept mutually confidential. For such systems, we first derive
Externí odkaz:
http://arxiv.org/abs/2309.15483
This paper studies the design of energy-efficient artificial noise (AN) schemes in the context of physical layer security in visible light communications (VLC). Two different transmission schemes termed $\textit{selective AN-aided single-input single
Externí odkaz:
http://arxiv.org/abs/2309.14636
The problem of non-monotone $k$-submodular maximization under a knapsack constraint ($\kSMK$) over the ground set size $n$ has been raised in many applications in machine learning, such as data summarization, information propagation, etc. However, ex
Externí odkaz:
http://arxiv.org/abs/2309.12025