Search for dissertations about: "cellular phone"

Showing result 1 - 5 of 10 swedish dissertations containing the words cellular phone.

  2. 1. Self-management in hypertension care

    Author : Ulrika Bengtsson; Göteborgs universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; adherence; blood pressure; cellular phone; communication; health information technology; hypertension; person-centered care; person-centred care; self-management;

    Abstract : Despite effective treatment strategies for hypertension, many persons with hypertension still fail to reach recommended blood pressure targets. As hypertension is a significant risk factor for cardiovascular disease, measures are needed to decrease the mortality attributed to this condition and to facilitate an optimization of hypertension management. READ MORE

  4. 2. Three problems with internetworking in cellular networks

    Author : Lars-Åke Larzon; []
    Keywords : ;

    Abstract : Over the last decade, cell phones have gone from providing the traditional interactive voice service to also include support for Internet services. Cellular networks that originally were designed for cost-efficient voice services supply low bandwidth, high error rates and long round-trip delays, which poorly fit the generous header sizes, lack of error tolerance and reliance on retransmissions of the Internet. READ MORE

  5. 3. Generating Road Traffic Information Based on Cellular Network Signaling

    Author : David Gundlegård; Johan M Karlsson; Di Yuan; Francisco Benitez; Linköpings universitet; []
    Keywords : ;

    Abstract : Cellular networks of today generate a massive amount of signalling data. A large part of this signalling is generated to handle the mobility of subscribers, irrespective of the subscriber actively uses the terminal or not. Hence it contains location information that can be used to fundamentally change our understanding of human travel patterns. READ MORE

  6. 4. Integrated Transmitters for Cellular User Equipment–Wideband CMOS Power Amplifiers and Antenna Impedance Tuners

    Author : Jonas Lindstrand; Institutionen för elektro- och informationsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CMOS; LTE; Impedance tuner; Injection lock; Power amplifier; Efficiency; Polar bandwidth expansion; multiband;

    Abstract : The digital cellular systems era started about thirty years ago with the release of the first digital cellphones. These first digital cellphones were very different from today’s slim and esthetic cellular pocket computers. They were not mass-produced in million units a day, and they were designed for radio performance rather than appearance. READ MORE

  7. 5. Studies of Three Different Methods to Estimate the Up-link Performance of Mobile Phone Antennas

    Author : Sathyaveer Prasad; Peter Händel; Claes Beckman; Jan Carlsson; Högskolan i Gävle; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Antenna measurements; mobile phones; total radiated power; reverberation chamber; anechoic chamber; Telia Scattered Field Method; Maximum likelihood Estimator; Telecommunication; Telekommunikation;

    Abstract : Antennas play an important role in determining the overall radio performance for wireless communications. If all other radio components perform according to their specifications, the performance of a mobile phone can be entirely determined by measuring the efficiency of its antenna. READ MORE