I discuss the design and performance issues arising in the efficient implementation of the scaled-integer exact real arithmetic model introduced by Boehm and others. This system represents an real number with a automatically controlled level of precision by a rational with implicit denominator. I describe three practical codes, in python, C ++ and C. These… (More)
— Long Term Evolution (LTE) represents the fourth generation (4G) technology which is capable of providing high data rates as well as support of high speed mobility. The EU FP7 Mobile Cloud Networking (MCN) project integrates the use of cloud computing concepts in LTE mobile networks in order to increase LTE's performance. In this way a shared distributed… (More)
Spectrum trading is an important tool to increase overall spectrum utilization and to open up opportunities for businesses to get access to desired spectrum. It has been implemented in some countries for some spectrum bands. At the same time, systems and architectures for cognitive radio technologies are being developed that are able to dynamically use… (More)
Spectrum sensing, in particular, detecting the presence of incumbent users in licensed spectrum, is one of the pivotal task for cognitive radios (CRs). In this paper, we provide solutions to the spectrum sensing problem by using statistical test theory, and thus derive novel spectrum sensing approaches. We apply the classical Kolmogorov-Smirnov (KS) test to… (More)
I compute several terms of the asymptotic expansion of the number of connected labelled graphs with n nodes and m edges, for small k = m−n. I thus identify an error in a recent paper of Flajolet et al.