93,819 research outputs found
Sparse Message Passing Based Preamble Estimation for Crowded M2M Communications
Due to the massive number of devices in the M2M communication era, new
challenges have been brought to the existing random-access (RA) mechanism, such
as severe preamble collisions and resource block (RB) wastes. To address these
problems, a novel sparse message passing (SMP) algorithm is proposed, based on
a factor graph on which Bernoulli messages are updated. The SMP enables an
accurate estimation on the activity of the devices and the identity of the
preamble chosen by each active device. Aided by the estimation, the RB
efficiency for the uplink data transmission can be improved, especially among
the collided devices. In addition, an analytical tool is derived to analyze the
iterative evolution and convergence of the SMP algorithm. Finally, numerical
simulations are provided to verify the validity of our analytical results and
the significant improvement of the proposed SMP on estimation error rate even
when preamble collision occurs.Comment: submitted to ICC 2018 with 6 pages and 4 figure
Higgs boson production and decay at colliders as a probe of the Left-Right twin Higgs model
In the framework of the Left-Right twin Higgs (LRTH) model, we consider the
constrains from the latest search for high-mass dilepton resonances at the LHC
and find that the heavy neutral boson is excluded with mass below 2.76
TeV. Under these constrains, we study the Higgs-Gauge coupling production
processes , and , top quark
Yukawa coupling production process , Higgs
self-couplings production processes and
at colliders.
Besides, we study the major decay modes of the Higgs boson, namely
(), , , .
We find that the LRTH effects are sizable so that the Higgs boson processes at
collider can be a sensitive probe for the LRTH model.Comment: Final version to appear in Nucl.Phys.
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