Creating and sharing knowledge for telecommunications

IMWS2010 - IEEE International Microwave Workshop Series on RF Front-ends for Software Defined and Cognitive Radio Solutions

on 22-02-2010

... Software Defined Radio has already start its way to conquer traditional radio configurations, by moving base band (de)modulators completely to the digital world and thus implementing it by software. Nevertheless, it is expected that Cognitive Radio, CR, will be the next frontier in terms of radio architecture design, in fact the new paradigm that CR can bring to traditional ways to think on radio architectures, is so huge, as it was the transition from Analog to Digital systems.

The agility of the transceiver architectures, combined with an optimization of radio front ends, is the main objective of this workshop, and will be discussed intensively throughout the several technical sessions and invited speakers during the two day period.

This conference/workshop is a two day conference where the first day is composed of invited speakers, and the second day is composed of regular submitted papers.

The workshop will be held in Aveiro/Portugal from 22 to 23 of February 2010,
and it already has two distinguished invited speakers that have confirmed
its presence, they are:

Prof. Fadhel Ghannouchi from University of Calgary, Canada, with
a talk devoted to “SDR Based Power amplifiers /Transmitters for Advanced
Wireless and Satellite Communications”,

Dr. Linus Maurer, from DICE, Linz, Austria, with a talk
devoted to “Highly Flexible Digital Front-End Enhanced CMOS-Based RF

Prof. Joe Mitola III, from Stevens Institute, USA, with a talk
devoted to “The front end needs for real SDR/CR implementations”
More Information..

Quantum Contract Signing

on 19-02-2010

... Nikola Paunkovic (SQIG-IT)

February 19, 2010, Friday, 15h.
Location: Room P4.35, Post-Graduation Building, IST.

Abstract: We present a probabilistic quantum contract signing protocol between two clients that requires no communication with the third trusted party during the commitment (i.e. signature exchange) phase. We discuss its fairness and show that it is possible to design such a protocol for which the probability of a dishonest client to cheat becomes negligible, and scales as N^{-1/2}, where N is the size of the signature, in bits. This way, our protocol over performs the classical probabilistic protocol by Ben-Or et. al., for which the probability to cheat can be as high as 1/4. We discuss the real-life scenario when the measurement errors and qubit state corruption due to noisy channels occur and argue that for real, good enough measurement apparatus and transmission channels, our protocol would still be fair. Our protocol could be implemented by today's technology, as it requires in essence the same type of apparatus as the one needed for BB84 cryptography protocol. Finally, we show that it is possible to generalize our protocol to an arbitrary number of clients.

Quantum Computation and Information Seminar

Support: CAMGSD, CFIF, CFP and SQIG/IT with support from FCT and FEDER, namely via projects PTDC/EEA-TEL/103402/2008 QuantPrivTel and PTDC/EIA/67661/2006 QSec.

More Information..