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Causal coding and feedback in Gaussian sensor networks

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Bounds on the Sum Capacity of Synchronous Binary CDMA Channels

Pedram Pad, Vahid Aref

In this paper, we obtain a family of lower bounds for the sum capacity of code-division multiple-access (CDMA) channels assuming binary inputs and binary signature codes in the presence of additive noise with an arbitrary distribution. The envelope of this ...

Institute of Electrical and Electronics Engineers2009

Orthogonal fluxgate type magnetic microsensors with wide linear operation range

Ozge Zorlu

This thesis presents a study on the development of microfabricated fluxgate type magnetic sensors operating within a wide linear operation range. Fluxgate type magnetic sensors are powerful devices due to their high sensitivity, low offset, and high temper ...

EPFL2008

An orthogonal fluxgate-type magnetic microsensor with electroplated Permalloy core

Radivoje Popovic, Pavel Kejik, Ozge Zorlu

In this paper, we present a new microfabricated orthogonal fluxgate sensor tructure. The sensor consists of an electroplated copper excitation rod surrounded by an electroplated Permalloy layer and has planar pick-up coils for signal detection. The use of ...

Elsevier2007

Bioinspired Vision-based Microflyers

Dario Floreano, Jean-Christophe Zufferey, Antoine Beyeler

We aim at developing vision-based controllers for microyers capable of ying autonomously in indoor environments. Although signicant advances have been made in this domain over the past decade, only subproblems have been successfully addressed (for example ...

2007

Convergence analysis for sequential Monte Carlo receivers in communications applications

Volkan Cevher

Recently, sequential Monte Carlo methods have been used in the telecommunications field, finding application in receiver design. Several properties of these receivers make their designs very attractive. These receivers do not require channel state informat ...

2006

Distributed sensing of noisy signals by thresholding of redundant expansions

Pascal Frossard, Pierre Vandergheynst, Karin Schnass

This paper addresses the problem of sensing or recovering a signal s, captured by distributed low-complexity sensors. Each sensor observes a noisy version of the signal of interest, and independently forms an approximant of its observation. This approximan ...

2006

On noisy feedback for interference channels

Michael Christoph Gastpar

An upper bound is established on the usefulness of noisy feedback for the interference channel (IC). The bound is based on the Hekstra-Willems dependence-balance arguments for two-way channels. For Gaussian ICs, the results suggest that feedback loses its ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2006

Joint source-channel coding with feedback

Communications is about conveying information from one point to another subject to certain performance constraints. The information is assumed to be generated by a source and may, for example, represent a voice waveform, the reading of a thermal sensor, or ...

EPFL2005

Synaptic Shot Noise and Conductance Fluctuations Affect the Membrane Voltage with Equal Significance

Wulfram Gerstner

The subthreshold membrane voltage of a neuron in active cortical tissue is a fluctuating quantity with a distribution that reflects the firing statistics of the presynaptic population. It was recently found that conductance-based synaptic drive can lead to ...

Massachusetts Institute of Technology Press2005

Second-order linear hyperbolic SPDEs driven by isotropic Gaussian noise on a sphere

Robert Dalang, Olivier Lévêque

We study a class of linear hyperbolic stochastic partial differential equations in bounded domains, that includes the wave equation and the telegraph equation, driven by Gaussian noise that is white in time but not in space. We give necessary and sufficien ...

2004