The advent of the Internet and the development of the New Generation Network (NGN) has enabled, while investments in licenses and the desire to stay competitive in the future has triggered the development of value added services (VAS). Due to high market penetration, the telecommunication industry has been facing income stagnation. Consequently, it has been shifting focus to VAS in order to inc...

This paper considers the Cramer-Rao lower Bound (CRB) for the source localization problem in the near field. More specifically, we use the exact expression of the delay parameter for the CRB derivation and show how this ‘exact CRB’ can be significantly different from the one given in the literature and based on an approximate time delay expression (usually considered in the Fresnel region). Thi...

Identifying how insurgents disrupt established markets is a major challenge. In this paper we study the disruptive potential of Skype, which is an Internet start-up company and potential insurgent to the telecom market. Our analysis is composed of two parts. First, we describe a Delphi study based on an analytical instrument developed by Rafii and Kampas that shall help us to discover Skype’s d...

I suggest explanations for the apparently puzzling bidding in the year 2000 British and German 3G telecom auctions. Relative-performance maximisation may have been important, but the outcome of the British auction seems to have been efficient. This paper bundles my comments on two papers presented at the December 2001 CES Ifo conference on the telecom auctions. (For those readers new to the sub...

A database for telecom applications must satisfy the same demanding requirements as the other components in the telecom network with respect to availability , scalability, and real-time performance. Unfortunately it is diicult to provide state-of-the-art real-time service without sacriicing the other. ClustRa is a parallel and distributed telecom DBMS designed as a careful balance between these...

Recently a concise expression for the subleading infrared singularity of dimensional-regularized gauge theories has been proposed. For conformal theories, such relation involves a universal eikonal contribution plus a non-eikonal contribution, related to the subleading term in the anomalous dimension of twist two operators with large spin. In this note we make use of the AdS/CF T correspondence...

The subject of this PhD thesis is the study of the impact of the nonlinearity in the performance of an optical telecom system. In particular the FWM phenomenon which is detrimental in WDM systems is analyzed theoretically and numerically, while various methods are proposed for its compensation. Finally the stability of nonlinear soliton pulses in CROWs is proposed in order to realize compact op...

The C Telecommunication library within DSP Station CAD framework is provided only for simulation purpose. These Telecom C primitives do only execute the corresponding algorithms without any hardware implementation concepts. Consequently, the designer is confronted to a dead end when trying to generate the final synthesisable telecom design from his (or her) C telecom processor description. The ...