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Sökning: LAR1:cth > Viberg Mats 1961

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Numrering	Referens	Omslagsbild	Hitta
141.	van der Veen, A., et al. (författare) Minimal Continuous State Space Parameterizations 1996 Ingår i: Proc. EUSIPCO 96, Trieste, Italy. Konferensbidrag (refereegranskat)
142.	Veen, Alle Jan Van Der, et al. (författare) Minimal continuous state-space parametrizations 2015 Ingår i: European Signal Processing Conference. - 2219-5491. Konferensbidrag (refereegranskat)abstract We present a minimal continuous parametrization of all multivariate rational contractive transfer functions.In contrast to traditional minimal parametrizations, this parametrization does not contain any structural indices, which makes it very suitable for identification algorithms that use nonlinear optimization to estimate the parameters.
143.	Viberg, Mats, 1961, et al. (författare) A Computationally Efficient Method for Joint Direction Finding and Frequency Estimation in Colored Noise 1998 Ingår i: Proc. 32nd Asilomar Conf. Sig., Syst., Comput., Pacific Grove, CA. Konferensbidrag (refereegranskat)
144.	Viberg, Mats, 1961, et al. (författare) Analysis of State Space System Identification Methods Based on Instrumental Variables and Subspace Fitting 1997 Ingår i: Automatica. ; 33:9, s. 1603-1616 Tidskriftsartikel (refereegranskat)
145.	Viberg, Mats, 1961, et al. (författare) Array Interpolation Based on Local Polynomial Approximation With Application to DOA Estimation Using Weighted MUSIC 2009 Ingår i: Proceedings of ICASSP 2009. ; , s. 2145 - 2148 Konferensbidrag (refereegranskat)abstract The problem of direction-of-arrival (DOA) estimation using an array of sensors has received much attention for more than 3 decades. This is due to a rich interest from application areas such as radar, sonar and wireless communication channel characterization. However, high resolution DOA estimation requires an accurate model of the array response. This is usually achieved by measuring the response using sources at known positions (calibration). This paper considers interpolation of the calibration measurements using knowledge of a nominal response model. Standard linear interpolation is compared to an approach based on local polynomial approximation (LPA). We also derive a weighted MUSIC estimator, which is applied using error estimates from the interpolation. Both LPA interpolation and weighted MUSIC are found to improve the performance, but not uniformly in all scenarios.
146.	Viberg, Mats, 1961, et al. (författare) Array Processing in Correlated Noise Fields Based on Instrumental Variables and Subspace Fitting 1995 Ingår i: IEEE Transactions on Signal Processing. ; 43, s. 1187-1199 Tidskriftsartikel (refereegranskat)
147.	Viberg, Mats, 1961, et al. (författare) Blind Signal Separation and Direction Finding of Finite Alphabet Signals 1997 Ingår i: Antenn 97, Nordic Antenna Conference, Göteborg, Sweden. Konferensbidrag (refereegranskat)
148.	Viberg, Mats, 1961, et al. (författare) Calibration in Array Processing 2009 Ingår i: Classical and Modern Direction-of-Arrival Estimation. ; , s. 93-124 Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract High-resolution direction-or-arrival estimation has been an active area of research since late 1970's. The methods find a wide range of applications, including passive listening arrays, radar and sonar, and spatial (or space-time) characterization of wireless communication channels. Conventional beamforming-based techniques for direction estimation are limited by the aperture (or physical size) of the array. In contrast, parametric methods promise an unlimited resolution in theory. These methods take advantage of a precise mathematical model of the received array data, for example due to incoming plane waves. In practice, the resolution and estimation accuracy is limited by noise as well as errors in the assumed data model. The focus of this chapter is on modeling errors, and in particular calibration techniques to mitigate such errors. Perhaps the most natural and common approach is to measure the response of the array in an anechoic chamber. These calibration measurements are then used to update the data model, either in the form of explicit unknown parameters or in a non-parametric way. Under favorable conditions it is also possible to estimate the response model together with the unknown directions, so-called auto-calibration. The purpose of this chapter is to give an overview of existing techniques and discuss their respective pros and cons. We will also elaborate on how the methods can be extended to more general situations, for example including frequency and polarization dependence. It should be mentioned that practical calibration also involves hardware adjustments, to compensate for temperature drift etc. The methods considered here can be classified as software calibration, where errors are handled by adjusting the assumed data model rather than correcting for it.
149.	Viberg, Mats, 1961 (författare) Can High-Performance and Robust Direction Finding be Achieved at a Reasonable Cost?" 2000 Ingår i: In Proc. First IEEE Sensor Array and Multichannel Signal Processing Workshop, Boston, MA, USA. Konferensbidrag (refereegranskat)
150.	Viberg, Mats, 1961 (författare) Direction of Arrival Estimation 2005 Ingår i: Smart Antennas - State-of-the-Art / edited by Thomas Kaiser et al.. Bokkapitel (övrigt vetenskapligt/konstnärligt)

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Typ av publikation: konferensbidrag (112); tidskriftsartikel (47); bokkapitel (10); rapport (1); annan publikation (1); patent (1); visa fler...; visa färre...

Typ av innehåll: refereegranskat (152); övrigt vetenskapligt/konstnärligt (20)

Författare/redaktör: Viberg, Mats, 19... (172)Ta bort avgränsningen; McKelvey, Tomas, 196 ... (22); Coldrey, Mikael, 197 ... (15); Rylander, Thomas, 19 ... (14); Panahi, Ashkan, 1986 (14); Stoica, P (13); visa fler...; Cerullo, Livia, 1982 (9); Ozcelikkale, Ayca, 1 ... (8); WINGES, JOHAN, 1987 (7); Chen, Ming, 1972 (7); Folestad, Staffan (6); Gradinarsky, Lubomir ... (6); Larzabal, P. (6); Eriksson, Thomas, 19 ... (5); Gu, Irene Yu-Hua, 19 ... (5); Ottersten, Björn E. (5); Matthaiou, Michail, ... (5); Pelin, Per, 1969 (5); Ferreol, A. (5); Wu, Q (4); Wong, M (4); Eriksson, Jonny, 196 ... (4); Ranheim, Anders, 196 ... (4); Falk, K (4); Yang, Jian, 1960 (3); Gustavsson, Tomas, 1 ... (3); Maaskant, Rob, 1978 (3); Mecklenbräuker, Chri ... (3); Zoubir, A.M. (3); Felter, Stefan, 1970 (3); Krim, H. (3); Razavi, Aidin, 1982 (3); Li, J. (2); Ottosson Gadd, Tony, ... (2); Sjöberg, Jonas, 1964 (2); Zhang, Jun (2); Yang, Bin, 1982 (2); Swindlehurst, L. (2); Athley, Fredrik, 196 ... (2); Bohlin, Patrik, 1974 (2); Galletti, M. (2); Nohlert, Johan, 1987 (2); Chung, Pei-Jung (2); Heath Jr., Robert W. (2); Hashemzadeh, Parham, ... (2); Pesavento, Marius (2); Ghaemi, Hirad, 1980 (2); Boerner, T. (2); Gekat, F. (2); Gustafsson, Tony, 19 ... (2); visa färre...

Lärosäte: Chalmers tekniska högskola (172); Uppsala universitet (2); Kungliga Tekniska Högskolan (1)

Språk: Engelska (172)

Forskningsämne (UKÄ/SCB): Teknik (108); Naturvetenskap (81); Medicin och hälsovetenskap (1)

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