Search for dissertations about: "spatially distributed sources"

Showing result 1 - 5 of 6 swedish dissertations containing the words spatially distributed sources.

  2. 1. Estimation and Performance Analysis of Wireless Multiple Antenna Communication Channels

    Author : Mikael Coldrey; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; capacity; Wireless communications; performance bounds; distributed sources; generalized beamforming; channel estimation; MIMO; training;

    Abstract : The focus of this thesis is on channel estimation in wireless communication systems that employ multiple antennas.The thesis is divided into two parts, whereof the first part addresses theproblem of parameter estimation of distributed sources. Due to, e.g. READ MORE

  4. 2. Channel Estimation in Wireless Communication Systems Employing Multiple Antennas

    Author : Mikael Coldrey; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; multiple antennas; capacity; channel estimation; non-parametric estimation; training; distributed sources; MIMO; Wireless communications; superimposed pilots; performance bounds;

    Abstract : Antennas that are able to adaptively direct the transmitted (and received) energy are of great interest in future wireless communication systems. The directivity implies reduced transmit power and interference, and also a potential for increased capacity. READ MORE

  5. 3. A GIS-based landscape analysis of dissolved organic carbon in boreal headwater streams

    Author : Jan-Olov Andersson; Lars Nyberg; Hjalmar Laudon; Karlstads universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; boreal forests; wetlands; vegetation types; headwater streams; catchment hydrology; streamwater chemistry; DOC; GIS; terrain analysis; DEM; slope; wetness index; TWI; Freshwater ecology; Limnisk ekologi; Biology; Biologi;

    Abstract : In boreal catchments, stream water chemistry is influenced and controlled by several landscape factors. The influence of spatially distributed variables is in turn dependent on the hydrological scale. READ MORE

  6. 4. Making visible the invisible : Health risks from environmental exposures among socially deprived populations of Nairobi, Kenya

    Author : Thaddaeus Wandera Egondi; Joacim Rocklöv; Nawi Ng; Remare Ettarh; Patrick Kinney; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; air pollution; urban health; temperature-related mortality; particulate matter; exposure assessment; child health; Epidemiology; epidemiologi; folkhälsa; Public health;

    Abstract : Background: Most countries of sub-Saharan Africa (SSA) are experiencing a high rate of ur­banization accompanied with unplanned development resulting into sprawl of slums. The weath­er patterns and air pollution sources in most urban areas are changing with significant effects on health. READ MORE

  7. 5. Geospatial data and knowledge on the Web : Knowledge-based geospatial data integration and visualisation with Semantic Web technologies

    Author : Weiming Huang; Institutionen för naturgeografi och ekosystemvetenskap; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geospatial data integration; data visualisation; Semantic Web; Linked Data; ontology;

    Abstract : Geospatial information is indispensable for various types of spatially informed analysis and decision-making, such as traffic analyses, and natural resource management. In addition, geospatial information is one of the most powerful information integrators to bridge diverse sources of information. READ MORE