The quadrature modulator is a fundamental radio component for worldwide digital wireless communication standards such as Global System for Mobile Communications (GSM), Digital Communications SystemsÐ1800 MHz (DCS1800), Digital European Cordless Telecommunications (DECT), American and Personal Digital Cellular (ADC/PDC), Japanese Personal Handy Phone (PHP RCR28). A typical system application and...

The present work shows a system for compressing and streaming of live videos over networks with low bandwidths (radio mobile networks), with the objective to design an effective solution for mobile video access. We present a mobile ready-to-use streaming system, that encodes video using h264 codec (offering good quality and frame rate at very low bit-rates) and streams it over the network using...

In this paper, we propose a single hidden layered fuzzy neural algorithm, which is able to provide a better quality of service constraints in a multi-cell scenario with three different radio access technologies (RATs) namely the Universal Mobile Telecommunication Systems (UMTS), the Wireless Local Area Network (WLAN) and the Global System for Mobile Telecommunication (GSM) / Enhanced Data rate ...

Background: Health Information Technology (HIT) has the potential for improving the quality, safety, and efficiency of healthcare and nurses are the largest group of HIT users. Objectives: Therefore, the present study mainly aimed to investigate the use of HIT by nurses in healthcare. Methods: This cross-sectional and descriptive-analytical study was conducted in four educational and treatmen...

In this demo, we present WiZi-Cloud, a system that utilizes a dual WiFi-ZigBee radio on mobile phones and Access Points, supported by WiZi-Cloud protocols, to achieve ubiquitous connectivity, high energy efficiency, and real time intra-device/inter-AP handover. WiZiCloud system is completely transparent to user applications and needs no modification or configurations on the existing application...

We analyze the clustering of scatterers in mobile radio channels, i.e, the fact that scatterers are usually not located uniformly in the whole coverage area, but tend to occur in clusters. While this has been recognized for some time, a realistic model for this phenomenon has been lacking up to now. We first analyze measurements to extract the distribution of the number of observed clusters. We...

The evolution of wireless and mobile networks becomes faster and faster, so the optimal allocation of radio resources is a problem which is imperative. This development of telecommunication networks is accompanied with an efficient deployment of wireless networks such Wireless Fidelity and networks mobile as LongTerm Evolution (LTE). In this paper, we propose an algorithm improving the global a...

Considering that mobile communications systems and the Internet are key technologies for the development of the information society, one objective of the European IST project BRAIN is the design of a mobile broadband IP radio interface. This radio interface is based on the ETSI HIPERLAN Type 2 standard with some enhancements necessary to optimise the system for the delivery of IP broadband serv...

To support patients with brain disturbances the mobile distributed care system named Mobtel is designed, implemented and tested in the daycare clinic for cognitive neurology at Leipzig University. The distributed care system is based on a platform independent implementation using Corba technologies. The mobile device, a palmtop computer, communicates with the stationary care system via bidirect...