746 research outputs found
Application of MIMO DF equalization to high-speed off-chip communication
In this contribution, we present a multiple-input multiple-output (MIMO) equalizer with decision feedback (DF) for high-speed chip-to-chip communication. We derive an elegant closed-form expression for the minimum mean square error (MMSE) equalization filters and show that the application of MIMO DF equalization (DFE) allows to significantly improve the reliability of high-speed communication over low-cost electrical interconnects
MIMO pre-equalization and DFE for high-speed off-chip communication
In this contribution, we present a multiple-input multiple-output (MIMO) transceiver scheme for high-speed chip-to-chip communication over low-cost electrical interconnects. Linear MIMO pre-equalization at the transmitter is combined with decision feedback equalization (DFE) at the receiver to counteract the adverse effect of inter symbol interference (ISI) and crosstalk (XT). Considering an energy constraint at the transmit side, we derive elegant closed-form expressions for the equalization filters under a minimum mean square error (MMSE) criterion. Numerical analysis shows that the combination of linear MIMO pre-equalization and MIMO DFE allows to significantly improve the reliability of future high-speed off-chip communication
Charged particle in higher dimensional weakly charged rotating black hole spacetime
We study charged particle motion in weakly charged higher dimensional black
holes. To describe the electromagnetic field we use a test field approximation
and use the higher dimensional Kerr-NUT-(A)dS metric as a background geometry.
It is shown that for a special configuration of the electromagnetic field the
equations of motion of charged particles are completely integrable. The vector
potential of such a field is proportional to one of the Killing vectors (called
primary Killing vector) from the `Killing tower' of symmetry generating objects
which exists in the background geometry. A free constant in the definition of
the adopted electromagnetic potential is proportional to the electric charge of
the higher dimensional black hole. The full set of independent conserved
quantities in involution is found. It is demonstrated, that Hamilton-Jacobi
equations are separable, as well as the corresponding Klein-Gordon equation and
its symmetry operators.Comment: 9 pages, no figure
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