| 1. |
- Adolfsson, Vilhelm, et al.
(författare)
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Localized Galerkin Estimates for Boundary Integral Equations on Lipschitz Domanis
- 1992
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Ingår i: SIAM Journal on Mathematical Analysis. - : SIAM. ; 5:23, s. 751-764
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Tidskriftsartikel (refereegranskat)abstract
- The Galerkin method is studied for solving the boundary integral equations associated with the Laplace operator on nonsmooth domains. Convergence is established with a condition on the meshsize, which involves the local curvature on certain approximating domains. Error estimates are also proved, and the results are generalized to systems of equations.
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| 2. |
- Arvidsson, Åke
(författare)
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On Dynamic Capacity Management in Voice/Frame Relaying Networks
- 1992
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Konferensbidrag (refereegranskat)abstract
- We consider call admission and capacity management in a dynamically reconfigurable network that carries a multitude of traffics. Our approach is a heuristic capacity as- signment algorithm designed to maximise an arbitrary profit function. The algorithm is based on the concept of equivalent circuits, i.e. a given relationship between transmis- sion capacities and call handling capabilities expressed as effective numbers of circuits. Such relationships are examined for the two traffics of our application, voice and frame relaying. Methods and results are independent of the transfer mode used.
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| 3. |
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| 4. |
- Claesson, Ingvar, et al.
(författare)
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A Spatial Filtering Approach to Robust Adaptive Beamforming
- 1992
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Ingår i: IEEE Transactions on Antennas and Propagation. - New York : Institute of electrical and electronics engineers. - 0018-926X. ; 40:9, s. 1093-1096
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Tidskriftsartikel (refereegranskat)abstract
- This communication treats the problem of controlling the superresolution in adaptive beamformers. A straightforward method is presented that works for both narrow-band and broad-band arrays. The method is based on forming the blocking matrix in a general sidelobe canceller (GSC) structure using a spatial FIR filter. The suppression of this spatial filter and the implicit noise of the leaky (LMS) algorithm together determine the beamformer.
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| 5. |
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| 6. |
- Claesson, Ingvar, et al.
(författare)
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Car Performance of an Adaptive Microphone Array
- 1992
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Konferensbidrag (refereegranskat)abstract
- Hands free input of mobile telephones is often almost impossible due to the noise situation in the car and the channel quality. The authors present a method to enhance the quality using an adaptive microphone array. Measurements show an improvement of the input with approximately 10 dB. Tape results are available for subjective evaluation.
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| 7. |
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| 8. |
- Gustavsson, Jan-Olof, et al.
(författare)
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A Generalized Matched Filter
- 1992
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Ingår i: International Symposium on Signal Processing and Its Applications. - Gold Coast, Australia : IREE Australia. - 909394288 ; , s. 16-22
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Konferensbidrag (refereegranskat)abstract
- Parameter estimation in additive independent identically distributed noise is treated. It is shown that there exists a generalized form of the matched filter which can be used for an arbitrary noise distribution to make e.g. ML-, MAP- or MMSE-estimates of a parameter vector. Simulations are presented to illustrate the performance.
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| 9. |
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| 10. |
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