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1.	Butt, John, et al. (author) Ruth Tatlow: Bach and the Riddle of the Number Alphabet 1992 In: Music and Letters. - 0027-4224 .- 1477-4631. ; 49:1, s. 97-99 Review (pop. science, debate, etc.)
2.	Clement, Albert, et al. (author) Ruth Tatlow: Bach and the Riddle of the Number Alphabet 1991 In: Het Orgel. - 0166-0101. ; 19 July Review (pop. science, debate, etc.)
3.	Anderson, Helén, et al. (author) Role and Position : Understanding Dynamics in Business Networks 1993 In: Paper presented at the 9th IMP Annual Conference, Bath, UK, september 23-25. Conference paper (other academic/artistic)
4.	Andersson, Sören, et al. (author) An adaptive array for mobile communication systems 1991 In: IEEE Transactions on Vehicular Technology. - Toronto, Ont, Can : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9545 .- 1939-9359. ; 40:1 pt 2, s. 230-236, s. 3289-3292 Journal article (peer-reviewed)abstract The use of adaptive antenna techniques to increase the channel capacity is discussed. Directional sensitivity is obtained by using an antenna array at the base station, possibly both in receiving and transmitting modes. A scheme for separating several signals at the same frequency is proposed. The method is based on high-resolution direction-finding followed by optimal combination of the antenna outputs. Comparison with a method based on reference signals is made. Computer simulations are carried out to test the applicability of the technique to scattering scenarios that typically arise in urban areas. The proposed scheme is found to have great potential in rejecting cochannel interference, albeit at the expense of high computational requirements.
5.	Doherty, Patrick, 1957-, et al. (author) Fuzzy if-then-unless rules and their implementation. 1992 In: International Conference on Information Processing and Management of Uncertainty in Knowledge-Based Systems, IPMU92,1992. - Linköping, Sweden : Springer. Conference paper (peer-reviewed)
6.	Leden, Lars (author) Pedestrian accidents and left-turning traffic at signalized intersections 1994 In: VTI:s och KFB:s forskardagar. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 125-148, s. 125-148 Conference paper (other academic/artistic)
7.	Wahlberg, Bo, et al. (author) Robust Signal Parameter Estimation in the Presence of Array Perturbations 1991 In: Proc. of 1991 International Conference on Acoustics, Speech, and Signal Processing, 1991. ICASSP-91.. - Linköping : IEEE. ; , s. 3277-3280 Conference paper (peer-reviewed)abstract Signal parameter estimators which are less sensitive to perturbations in the array manifold are presented. A parametrized stochastic model for the array uncertainties is introduced. The unknown array parameters can include the individual gain and phase responses of the sensors as well as their positions. Based on this model, a maximum a posteriori (MAP) estimator is formulated. This results in a fairly complex optimization problem which is computationally expensive. The MAP estimator is simplified by exploiting properties of the weighted subspace fitting method. An approximate method that further reduces the complexity is also presented, assuming smallarray perturbations. A compact expression for the MAP Cramer-Rao bound (CRB) on the signal and arrayparameter estimates is derived. A simulation study indicates that the proposed robust estimation procedures achieve the MAP-CRB even for moderate sample sizes.
8.	Ljung, Lennart, 1946-, et al. (author) Adaptive System Performance in the Frequency Domain 1992 In: Adaptive systems in control and signal processing 1992. - Linköping : Linköping University. - 9780080425962 ; , s. 33-40 Conference paper (peer-reviewed)
9.	Akçay, Hüseyin, et al. (author) On the Choice of Norms in System Identification 1994 In: Proceedings of the 10th IFAC Symposium on System Identification. - Linköping : Linköping University. - 9780080422251 ; , s. 103-108 Reports (other academic/artistic)abstract In this paper we discuss smooth and sensitive norms for prediction error system identification when the disturbances are magnitude bounded. Formal conditions for sensitive norms, which give an order of magnitude faster convergence of the parameter estimate variance, are developed. However, it also is shown that the parameter estimate variance convergence rate of sensitive norms is arbitrarily bad for certain distributions. A necessary condition for a norm to be statistically robust with respect to the family F(C) of distributions with support [-C, C] for some arbitrary C>0 is that its second derivative does not vanish on the support. A direct consequence of this observation is that the quadratic norm is statistically robust among all lp-norms, p⩽2<∞ for F(C).
10.	Akçay, Hüseyin, et al. (author) The Least-Squares Identification of FIR Systems Subject to Worst-Case Noise 1994 In: Proceedings of the 10th IFAC Symposium on System Identification. - Linköping : Linköping University. - 9780080422251 ; 23:5, s. 329-338 Reports (other academic/artistic)abstract The least-squares identification of FIR systems is analyzed assuming that the noise is a bounded signal and the input signal is a pseudo-random binary sequence. A lower bound on the worst-case transfer function error shows that the least-square estimate of the transfer function diverges as the order of the FIR system is increased. This implies that, in the presence of the worst-case noise, the trade-off between the estimation error due to the disturbance and the bias error (due to unmodeled dynamics) is significantly different from the corresponding trade-off in the random error case: with a worst-case formulation, the model complexity should not increase indefinitely as the size of the data set increases.

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Type of content: peer-reviewed (12819); other academic/artistic (7453); pop. science, debate, etc. (327)

Author/Editor: Ljung, Lennart, 1946 ... (101); Åström, Karl Johan (85); Turner, Anthony, 195 ... (84); Svanberg, Sune (83); Rönnberg, Jerker, 19 ... (79); Herlitz, Johan (73); show more...; Nordén, Bengt, 1945 (70); Forssberg, Eric (67); Knutsson, Hans (64); Gerdin, Bengt, 1947- (59); Wiberg, Nils-Erik, 1 ... (56); Shahnavaz, Houshang (54); Berg, Sören (52); Forsman, Krister (51); Leckner, Bo G, 1936 (50); Johnsson, Lennart (48); Nyholm, R. (48); Wigertz, Ove, 1934- (48); Adlercreutz, Patrick (47); Johansson, Rolf (46); Viberg, Mats (45); Kärnefelt, Ingvar (44); Maguire Jr., Gerald ... (43); Mattiasson, Bo (41); Hjalmarson, Å (40); Abrahamson, Magnus (39); Laurell, Fredrik (39); Wahlberg, Bo, 1959- (38); Agardh, Carl-David (38); Baldetorp, Bo (38); Karlsson, Ulf O. (38); Cederwall, Bo (38); Hwang, Philip, 1950 (38); Claesson, PM (38); Gustafsson, Fredrik (37); Möller, Claes, 1950- (37); Bååth, L.B. 1948- (37); Andersson-Engels, St ... (35); Engström, Tomas, 195 ... (35); Fritzson, Peter (35); Nordblad, P (35); Owman, Christer (35); Berntsson, Thore, 19 ... (34); Sundqvist, Bertil (34); Andersen, J. N. (34); Karlson, BW (33); Zander, Jens (32); Ny, Tor (32); van Toorn, Roemer, 1 ... (32); Höglund, Erik (32); show less...

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