Search for dissertations about: "pattern diversity"

Showing result 1 - 5 of 143 swedish dissertations containing the words pattern diversity.

  1. 1. Investigating and Enhancing Performance of Multiple Antenna Systems in Compact MIMO/Diversity Terminals

    Author : Shuai Zhang; Sailing He; Raj Mittra; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multiple antennas; planar inverted-F antenna; mutual coupling; slot antenna; compact antenna; mobile antenna; Q factors; antenna array; ultra-wideband UWB antenna; pattern diversity; polarization diversity; user effects; adaptive arrays; chassis mode;

    Abstract : Today, owners of small communicating device are interested in transmitting or receiving various multimedia data. By increasing the number of antennas at the transmitter and/or the receiver side of the wireless link, the diversity/Multiple-Input Multiple-Output (MIMO) techniques can increase wireless channel capacity without the need for additional power or spectrum in rich scattering environments. READ MORE

  2. 2. The Effects of Mutation and Selection on the Rate and Pattern of Molecular Evolution in Birds

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Sofia Berlin; Uppsala universitet.; [2004]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular genetics; substitution rate; diversity; selection; male mutation bias; birds; Genetik; NATURAL SCIENCES Biology Cell and molecular biology Genetics; NATURVETENSKAP Biologi Cell- och molekylärbiologi Genetik;

    Abstract : By comparing sequence diversity and divergence on sex chromosomes one can study how the rate of evolution in affected by mutation and/or selection. The rate of mutation in male biased, meaning that relatively more mutations are created in the male germ line than in the female. READ MORE

  3. 3. Characterization of Terminal Antennas for Diversity and MIMO Systems by Theory, Simulations and Measurements in Reverberation Chamber

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Kent Rosengren; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mode stirred chamber; embedded pattern; channel capacity; radiation efficiency; reverberation chamber; embedded element; MIMO; diversity gain;

    Abstract : This thesis is based on the work of designing and building a small reverberation chamber, and to use this chamber for characterization of antennas on mobile terminals such as phones. The characterization is done in terms of radiation efficiency, diversity gain and maximum available capacity. READ MORE

  4. 4. Diversity and Ecosystem Functioning Redundancy and Resilience in Freshwater Bacterial Communities

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Hannes Peter; Lars J. Tranvik; Eva S. Lindström; Silke Langenheder; Nelson G. Hairston; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; biodiversity; ecosystem functioning; bacteria; fresh water; biofilms; multifunctionality; ecological networks; perturbation; fragility; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

    Abstract : Bacteria are immensely diverse and hold key-positions in essentially all biogeochemical cycles. In freshwater ecosystems, bacteria degrade and mineralize organic compounds, linking the pool of dissolved organic matter to higher trophic levels. READ MORE

  5. 5. Stormwater Runoff at a Wood Manufacturing Industry : Diversity in leaching pattern from different tree species

    University dissertation from Linnaeus University

    Author : Henric Svensson; William Hogland; Troleif Bramryd; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : .... READ MORE