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Cooperative Data Exchange and Private Information Retrieval

Publications associées (89)

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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

Trust-region methods based on radial basis functions with application to biomedical imaging

Rodrigue Oeuvray

We have developed a new derivative-free algorithm based on Radial Basis Functions (RBFs). Derivative-free optimization is an active field of research and several algorithms have been proposed recently. Problems of this nature in the industrial setting are ...

EPFL2005

On the Impossibility of Boosting Distributed Service Resilience

Rachid Guerraoui

We show that no deterministic algorithm can solve consensus in the presence of t+1 process crash failures, in a system of n processes that communicate in a reliable way and synchronize their activities using any number of t-resilient services. These base s ...

2005

Efficient decentralized communications in sensor networks

Razvan Cristescu

This thesis is concerned with problems in decentralized communication in large networks. Namely, we address the problems of joint rate allocation and transmission of data sources measured at nodes, and of controlling the multiple access of sources to a sha ...

EPFL2004

On the joint source and channel coding of atomic image streams

Pascal Frossard

This paper presents an error resilient coding scheme for atomic image bitstreams, as generated by Matching Pursuit encoders. A joint source and channel coding algorithm is proposed, that takes benefit of both the flexibility in the image representation, an ...

IEEE2004

Concatenated codes for block-fading channels

Albert Guillén i Fàbregas

In this thesis we study coding strategies for single-user block-fading channels. The block-fading channel is a simplified model of slowly varying wireless communication channels with stringent delay constraints. This model is particularly important in prac ...

EPFL2004

On Network Correlated Data Gathering

Martin Vetterli, Razvan Cristescu

We consider the problem of correlated data gathering by a network with a sink node and a tree communication structure, where the goal is to minimize the total transmission cost of transporting the information collected by the nodes, to the sink node. Two c ...

2004

Using RASTA in task independent TANDEM feature extraction

John David Scott Dines, Guillermo Aradilla

In this work, we investigate the use of RASTA filter in the TANDEM feature extraction method when trained with a task independent data. RASTA filter removes the linear distortion introduced by the communication channel which is demonstrated in a 18% relat ...

IDIAP2004

Using RASTA in task independent TANDEM feature extraction

John David Scott Dines, Guillermo Aradilla

2004

Source-Channel Communication in Sensor Networks

Martin Vetterli, Michael Christoph Gastpar

Sensors acquire data, and communicate this to an interested party. The arising coding problem is often split into two parts: First, the sensors compress their respective acquired signals, potentially applying the concepts of distributed source coding. Then ...

2003