Search for dissertations about: "base station antenna"

Showing result 1 - 5 of 60 swedish dissertations containing the words base station antenna.

2. 1. Spatial diversity receivers for base station antenna arrays

   Author : Per Pelin; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; synchronization; data reduction; spatial diversity; antenna array; finite alphabet; multi-user; iterative least squares; RAKE-combiner; reciever; base station;

   Abstract : .... READ MORE

4. 2. Base Station Coordination in Multicell MIMO Networks

   Author : Nima Seifi; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; beamforming; Antenna tilt; intercell interference; base station coordination; scheduling.;

   Abstract : The use of multi-antenna technology, also referred to as multiple-input multipleoutput (MIMO), has been shown to improve both the achievable data rates and the link reliability in single-cell wireless systems without a need for extra power or bandwidth. The promised gains of MIMO techniques are, however, severely degraded in a multicell environment due to the presence of intercell interference,especially for users at the cell edge. READ MORE

5. 3. Direction finding, beamforming and mutual coupling in base station antenna arrays

   Author : Staffan Lundgren; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mutual coupling; adaptive arrays; direction finding; base station antennas; mobile communications; phase-only nulling; beamforming; dual polarization; butler matrix;

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6. 4. Mobile cellular communications with base station antenna arrays

   Author : Per Zetterberg; KTH; []
   Keywords : ;

   Abstract : This thesis deals with the problem of increasing thespectrum efflciency of cellular systems by the use of antennaarray base stations. The focus of the thesis is on downlinktransmission in frequency division duplex systems. i.e. READ MORE

7. 5. Analysis and Design of Base Station Antennas for Mobile Communications

   Author : Björn Lindmark; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; polarization diversity; dual polarization; adaptive antennas; moment method; genetic algorithm; antenna arrays; radio propagation; channel sounding; aperture coupled patch;

   Abstract : The thesis deals with base station antennas and the environment they work in. Polarization diversity, dual band operation, and adaptive antenna systems are discussed with emphasis on how antennas for these applications should be designed. We compare the polarization diversity performance of different types of dual polarized antenna elements. READ MORE