Communication Schemes with Constrained Reordering of Resources
Dec 05, 2012
from 04:00 PM to 05:00 PM
|Contact Name||Prof. Suhas Diggavi|
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Aalborg University, Denmark
Wednesday, December 5, 2012, 4:00pm
Maxwell Room 57-124
This talk introduces a communication model inspired by two practical scenarios. The first scenario is related to the concept of protocol coding, where information is encoded in the actions taken by an existing communication protocol. We investigate strategies for protocol coding via combinatorial reordering of the labelled user resources (packets, channels) in an existing, primary system. However, the degrees of freedom of the reordering are constrained by the operation of the primary system. The second scenario is related to communication systems with energy harvesting, where the transmitted signals are constrained by the energy that is available through the harvesting process. We have introduced a communication model that covers both scenarios and elicits their key feature, namely the constraints of the primary system or the harvesting process. We have shown how to compute the capacity of the channels pertaining to the communication model when the resources that can be reordered have binary values. The capacity result is valid under arbitrary error model in which errors in each resource (packet) occur independently. Inspired by the information–theoretic analysis, we have shown how to design practical error–correcting codes suited for the communication model. It turns out that the information– theoretic insights are instrumental for devising superior design of error–control codes.
Petar Popovski is a Professor at Aalborg University, Denmark where he held faculty positions since 2004. He has more than 140 publications in journals, conference proceedings and books and has more than 25 patents and patent applications. He has received the Young Elite Researcher award and the SAPERE AUDE career grant from the Danish Council for Independent Research. He has received six best paper awards, including three from IEEE. Dr. Popovski serves on the editorial board of several journals, including IEEE Communications Letters (Senior Editor), IEEE JSAC Cognitive Radio Series, IEEE Transactions on Communications and IEEE Transactions on Wireless Communications. His research interests are in the broad area of wireless communication and networking, information theory and protocol design.