| 1. |
- Luo, J., et al.
(författare)
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Transmit Beamforming for Inter-Operator Spectrum Sharing : From Theory to Practice
- 2012
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Ingår i: Proceedings of the International Symposium on Wireless Communication Systems. - : IEEE conference proceedings. - 9781467307604 - 9781467307611 ; , s. 291-295
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Konferensbidrag (refereegranskat)abstract
- In this paper, four transmit beamforming (BF) techniques are selected and compared to realize inter-operator spectrum sharing, which is a promising solution for the spectrum shortage problem. The BF techniques include two game-theoretic (GT) algorithms, zero-forcing (ZF) and minimum mean square error (MMSE). After a brief description of the BF techniques in a multiple-input single-output (MISO) system, their computational complexity is analyzed. The effectiveness of these techniques in real radio frequency (RF) signal transmission is verified by implementation on a flexible hardware-in-the-loop (HIL) testbed. First, several important aspects regarding practical implementation are discussed. Afterwards, the HIL measurement results are shown, where considerable sum rate gain can be observed due to spectrum sharing. Finally, the appropriate BF technique can be chosen based on a tradeoff between complexity and performance.
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| 2. |
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| 3. |
- Bäckström, M., et al.
(författare)
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Improved product quality and increased production capacity with impulse technology
- 2009
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Ingår i: Pulp & paper Canada. - 0316-4004. ; 110:2, s. 33-36
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Tidskriftsartikel (refereegranskat)abstract
- Impulse technology is a high-intensity web consolidation technique in which water is removed from a wet paper web by the combined action of mechanical pressure and intense heat. Pilot trials show that impulse technology is a feasible technique for the production of linerboard, paperboard and fine paper. Improved dewatering, combined with enhanced mechanical and surface properties, are benefits that can be obtained.
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| 4. |
- Larsson, Erik G., et al.
(författare)
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Game Theory and the Flat-Fading Gaussian Interference Channel : Analyzing Resource Conflicts in Wireless Networks
- 2009
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Ingår i: IEEE signal processing magazine (Print). - 1053-5888 .- 1558-0792. ; 26:5, s. 18-27
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Tidskriftsartikel (refereegranskat)abstract
- In this article, we described some basic concepts from noncooperative and cooperative game theory and illustrated them by three examples using the interference channel model, namely, the power allocation game for SISO IFC, the beamforming game for MISO IFC, and the transmit covariance game for MIMO IFC. In noncooperative game theory, we restricted ourselves to discuss the NE and PoA and their interpretations in the context of our application. Extensions to other noncooperative approaches include Stackelberg equilibria and the corresponding question "Who will go first?" We also correlated equilibria where a certain type of common randomness can be exploited to increase the utility region. We leave the large area of coalitional game theory open.
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| 5. |
- Lindblom, A. T., et al.
(författare)
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Improved paperboard properties with impulse technology
- 2006
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Ingår i: Professional Papermaking. - 1612-0485. ; :1, s. 53-57
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Tidskriftsartikel (refereegranskat)abstract
- Impulse technology is a high-intensity web consolidation process in which water is removed from a wet paper web by the combined action of mechanical pressure and high temperature. Pilot scale papermaking trials on STFI-Packforsk's research paper machine showed that impulse technology is a viable consolidation process for production of paperboard. Pilot trials showed significant improvements both in product quality and production efficiency. The surface of impulse pressed paperboard presented lower surface roughness and more uniform surface topographythan a reference board consolidated with wet pressing. This resulted in better print uniformity. The increase in surface smoothness was achieved without loss in total bulk, which preserved stiffness. Thus the relationship between surface roughness and bending stiffness was improved. The outgoing solids content after pressing increased at elevated temperatures, which provides a potential for increases in production capacity.
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