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Coding Schemes and Asymptotic Capacity for the Gaussian Broadcast and Interference Channels With Feedback

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Properties of Smoothing with Time Gating

Marten Sjöström

Estimates of transfer functions from measurements contain undesired information -- noise -- whose effect can partly be taken away by applying different smoothing techniques. One such smoothing technique suggests to remove the noise by gating the impulse re ...

2000

Approaching the AWGN Channel Capacity without Active Shaping

Rüdiger Urbanke, Bixio Rimoldi

It is shown that the capacity of the AWGN channel can be approached via a multilevel coding scheme with the output of each encoder mapped into an independent signal constellation. No active shaping is required in this scheme, regardless of the signal-to-no ...

1997

Accelerometer - enhanced speed estimation for linear - drive machine tool axes

Machine-tool axes for high-speed machining make great demands on the mechanical system, the actuators, and the numerical control. They require a high stiffness, a high bandwidth, and a precise motion at maximum speed. Linear motors as direct drives for mac ...

EPFL1996

Probabilistic solutions of high order partial differential equations

Max-Olivier Hongler, Philippe Blanchard

We consider a stochastic differential equation in which the noise is the sum of a white noise, a Poisson noise and a continuous time Markov chain. The probability densities governing the dynamics solve high order partial differential equations and the solu ...

1993

Ion Temperature-Measurements in a Tokamak by Collective Thomson Scattering

Basil Duval, Jonathan Bryan Lister, Antoine Pochelon, Roland Behn, Markus Siegrist

Collective Thomson scattering, using a high-power pulsed D2O laser at 385-mu-m and a heterodyne receiver system, has provided local ion temperature (T(i)) measurements of the plasma in the tokamak chauffage Alfven (TCA) tokamak. Recent improvements in the ...

1991

Valence State of Copper in Nd2-Xcexcuo4

Giorgio Margaritondo

New photoemission data are presented for a series of Ce-doped or undoped, reduced or nonreduced, Nd cuprates. The data, taken with high signal-to-noise level in the constant-initial-state mode, demonstrate the presence of Cu+, in contrast with previous pho ...

1991