1,923 research outputs found
Non-sterile electroweak-scale right-handed neutrinos and the dual nature of the 125-GeV scalar
Can, and under which conditions, the 125-\gev SM-like scalar with the signal
strengths for its decays into , , ,
and being consistent with experiments be accommodated in
models that go beyond the Standard Model? Is it truly what it appears to be,
namely the SM Higgs boson, or could it be quite different? A minimal extension
of the original electroweak-scale right-handed neutrino model, in which
right-handed neutrinos naturally obtain electroweak-scale masses, shows a
scalar spectrum which includes either the 125-\gev SM-like scalar or a scalar
which is quite {\em unlike} that of the Standard Model, both of which
possessing signal strengths compatible with experiment. In other words, the
125-\gev scalar could be an {\em impostor}.Comment: 36 double-column pages, 13 Figures, 9 Tables. Typos corrected.
Version to appear in Nuclear Physics
Optimal Beamforming for Physical Layer Security in MISO Wireless Networks
A wireless network of multiple transmitter-user pairs overheard by an
eavesdropper, where the transmitters are equipped with multiple antennas while
the users and eavesdropper are equipped with a single antenna, is considered.
At different levels of wireless channel knowledge, the problem of interest is
beamforming to optimize the users' quality-of-service (QoS) in terms of their
secrecy throughputs or maximize the network's energy efficiency under users'
QoS. All these problems are seen as very difficult optimization problems with
many nonconvex constraints and nonlinear equality constraints in beamforming
vectors. The paper develops path-following computational procedures of
low-complexity and rapid convergence for the optimal beamforming solution.
Their practicability is demonstrated through numerical examples
Real-time Optimal Resource Allocation for Embedded UAV Communication Systems
We consider device-to-device (D2D) wireless information and power transfer
systems using an unmanned aerial vehicle (UAV) as a relay-assisted node. As the
energy capacity and flight time of UAVs is limited, a significant issue in
deploying UAV is to manage energy consumption in real-time application, which
is proportional to the UAV transmit power. To tackle this important issue, we
develop a real-time resource allocation algorithm for maximizing the energy
efficiency by jointly optimizing the energy-harvesting time and power control
for the considered (D2D) communication embedded with UAV. We demonstrate the
effectiveness of the proposed algorithms as running time for solving them can
be conducted in milliseconds.Comment: 11 pages, 5 figures, 1 table. This paper is accepted for publication
on IEEE Wireless Communications Letter
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