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Systems and methods for rate-compatible polar codes for general channels

Publications associées (33)

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Fundamental limits and optimal operation in large wireless networks

Ayfer Özgür Aydin

Wireless adhoc networks consist of users that want to communicate with each other over a shared wireless medium. The users have transmitting and receiving capabilities but there is no additional infrastructure for assisting communication. This is in contra ...

EPFL2009

A Deterministic Approach to Wireless Network Error Correction

Suhas Diggavi

In this paper we consider communication between two special nodes ("source" and "destination") in a wireless relay network, which has malfunctioning or malicious nodes (inserting errors). We develop the model for wireless network communication in the prese ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

On the Importance of Spatial Configuration of Information

Pierre Dillenbourg, Frédéric Kaplan, Hamed Seiied Alavi

The spatial layout of information influences collaborative interactions. We compared two awareness tools which give information on the status of participants in a collaborative work, one displaying it on a single screen and the other distributing it in the ...

2009

Differential Distributed Cayley Space-Time Codes

Frédérique Oggier

We consider a wireless relay network with no channel information, which implements differential distributed space-time coding. We propose a coding strategy based on Cayley codes, which yields high data rate codes available for an arbitrary number of relay ...

2009

Diversity embedding for broadband communication

Sanket Dusad

Given uncertainty in environment, a conservative approach is to design for the worst case, leading to a game-theoretic situation where the environment is controlled by an adversary. However, in many cases, the uncertainty arises from randomness, not an adv ...

EPFL2008

Wireless sensor networks for marginal farming in India

Jacques Panchard

In this dissertation, we explore the potential of wireless sensor networks (WSNs) in an original context, the small agriculture of Developing Countries (DCs). Our goal is to confront an emerging technology with a concrete problem of world-wide dimensions, ...

EPFL2008

Noncoherent multi-source network coding

Christina Fragouli, Suhas Diggavi, Mahdi Jafari Siavoshani

We examine the problem of multiple sources transmitting information to one or more receivers that require the information from all the sources, over a network where the network nodes perform randomized network coding. We consider the noncoherent case, wher ...

2008

Hierarchical Cooperation Achieves Optimal Capacity Scaling in Ad Hoc Networks

Olivier Lévêque, Ayfer Özgür Aydin

n source and destination pairs randomly located in an area want to communicate with each other. Signals transmitted from one user to another at distance r apart are subject to a power attenuation of 1/r^alpha as well as a random phase. We identify exactly ...

2007

Closing the gap in the capacity of random wireless networks via percolation theory

Patrick Thiran, Olivier Dousse

An achievable bit rate per source-destination pair in a wireless network of n randomly located nodes is determined adopting the scaling limit approach of statistical physics. It is shown that randomly scattered nodes can achieve, with high probability, the ...

2007

ON THE INEQUALITIES IN INFORMATION THEORY

Rethnakaran Pulikkoonattu

Claude Elwood Shannon in 1948, then of the Bell Labs, published one of the ground breaking papers in the history of engineering [1]. This paper (”A Mathematical Theory of Communication”, Bell System Tech. Journal, Vol. 27, July and October 1948, pp. 379 - ...

2007