background & objectives:extended-spectrum-b-lactamase (esbl)-producing strains of klebsiella pneumoniaare an important cause of many serious infections in hospitalized and nonhospitalized patients and delayed treatment of these infections in crease chance of death in patients. this study was performed to determine the prevalence of esbl-producing k. pneumonia and to evaluate the frequency o...

Recognition of distant-talking speech is indispensable for self-moving robots or tele-conference systems. However, background noise and room reverberations seriously degrade the sound capture quality in real acoustic environments. A microphone array is an ideal candidate as an effective method for capturing distant-talking speech. AMNOR (Adaptive Microphone-array for NOise Reduction) was propos...

This paper elaborates on the design and implementation of a prototype system architecture enabling for TVWS exploitation by LTE Advanced systems, under the real time secondary spectrum market policy. It describes a centralised infrastructure-based cognitive radio network, where dynamic TVWS allocation among unlicensed systems is administrated by a spectrum broker, carrying out radio-resource ma...

Opportunistic use of White Spaces (WS) has opened up a whole new paradigm in research on cognitive radio (CR). One of the issues addressed by the QoSMOS project is the design of a flexible and efficient physical layer (PHY) for CR systems. To this aim, different modulation techniques are being investigated and are presented in this paper. They fulfil the low out of band leakage and spectral eff...

In this paper, a new method of pulse compression polyphase code synthesis based on the aperiodic autocorrelation function properties and the assumption of coherent processing in the radar receiver is presented. Properties of the proposed code, including spectrum, ambiguity function, precompression bandlimiting effects, and the noise/clutter influence are analyzed. The main features of the synth...

With the progress of society signal measurement and analysis have more widely range of applications, but the spectrum analyzer was generally expensive to make it difficult for popularization and application. In this paper, a design methodology of low cost, stable reliable spectrum analyzer based on the idea of Software Defined Radio (SDR) is presented, which consists of three functional units. ...

The 2010 German 4G spectrum auction was an unusually large simultaneous ascending multi-band auction. The bidding was competitive and the final assignment was efficient. However, our analysis suggests that independent and rational bidders had an opportunity to coordinate implicitly on a lowrevenue outcome. Coordination was difficult, though, because of a multiplicity of focal points. One import...

Testbed Design for Cognitive Radio Spectrum Sensing Experiments by Artem Tkachenko Master of Science in Engineering Electrical Engineering and Computer Sciences University of California, Berkeley Professor Robert Brodersen, Chair In this research project, requirements for cognitive radio testbed have been analyzed. A testbed, based on Berkeley Emulation Engine (BEE2), has been developed to stud...

We are responding to Public Notice DA 05-1267, which seeks comment on the proposed experimental design to eva luate aspects of the FCC's alternative auction methods, both with and without package bidding. The experimental design is ambitious. Our main comment is that the effort will be more productive if there is more focus on elements for which past experience and existing knowledge does not p...

The most important aspect when designing Split-spectrum algorithms is the filter bank design. There are two main trends commonly followed. One is based on constant bandwidth Gaussian filters equally spaced in frequency and the other one uses wavelets as a multiresolution time-scale method. In this paper we present an alternative that combines both techniques taking advantage from the best of ea...