Search for dissertations about: "Space-Time"

Showing result 1 - 5 of 151 swedish dissertations containing the word Space-Time.

2. 1. Space-Time Algorithms for Mobile Communications

   Author : Per Pelin; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; antenna array; model order selection; equalization; Bootstrap; space-time propagation; synchronization; RAKE-combiner; real data; data reduction; spatial diversity; finite alphabet;

   Abstract : Algorithms are presented for space-time signal processing in mobile communication systems employing base station antenna arrays. Two main issues are concerned. Reception of data transmitted on the uplink (mobile to base station transmission), and estimation of the parameters of the space-time mobile channel. READ MORE

4. 2. Space-Time Prediction of Ocean Winds

   Author : Anders Malmberg; Matematisk statistik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Statistics; operations research; image warping; thin-plate splines.; near-surface ocean winds; variogram parameters; Space-time Kalman filtering; real-time assimilation; residual wind speed; actuarial mathematics; programming; Statistik; operationsanalys; programmering; aktuariematematik;

   Abstract : The topic of this thesis is inspired by an experiment in which a vessel, laying a submarine cable, was provided with forecasts overlaid with satellite observations of significant wave height. During the operation, the vessel was close to an adverse weather area and the personnel on board could confirm that the forecast was not as close to the "ground truth" as the satellite observation was. READ MORE

5. 3. Designing Space-Time Codes Using Orthogonal Designs

   Author : Girish Ganesan; Thomas Marzetta; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Space-time codes; Orthogonal designs; Amicable orthogonal designs; Differential detection; Trellis codes; Turbo codes; Signal processing; Signalbehandling; Signalbehandling; Signal Processing;

   Abstract : This thesis deals with coding schemes for systems with multiple transmit antennas. The problem of finding optimal transmission schemes for the case when the transmitter knows the channel and the case when the transmitter does not know the channel are considered. READ MORE

6. 4. Finding a place for green politics : political space-time, globalisation and new environmental policy concepts

   Author : Lovisa Hagberg; Katarina Eckerberg; James Meadowcroft; Umeå universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Political science; space-time; political time; bioregionalism; green political theory; place; river basin management; critical loads; ‘think global; act local’; globalisation; Statsvetenskap; Political science; Statsvetenskap; statskunskap; political science;

   Abstract : The overarching aim of this dissertation is to rethink green ideas for change in political space-time against the background of globalisation. It is based on two avenues of investigation. First, green ideas are contrasted with the analyses of current changes in political space-time found in the globalisation literature. READ MORE

7. 5. Space-Time Processing Applications for Wireless Communications

   Author : Tommy Hult; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Space-Time Processing; Polarization; MIMO; Diversity; HAP;

   Abstract : Wireless mobile communication networks are rapidly growing at an incredible rate around the world and a number of improved and emerging technologies are seen to be critical to the improved economics and performance of these networks. The technical revolution and continuing growth of mobile radio communication systems has been made possible by extraordinary advances in the related fields of digital computing, high-speed circuit technology, the Internet and, of course, digital signal processing. READ MORE