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— This paper addresses canonical correlation analysis of two-channel data, when channel covariances are estimated from a limited number of samples, and are not necessarily full-rank. We show that empirical canonical correlations measure the cosines of the principal angles between the row spaces of the data matrices for the two channels. When the number of(More)
Several naturally occurring hybrids in Potentilla (Rosaceae) have been reported, but no molecular evidence has so far been available to test these hypotheses of hybridization. We have compared a nuclear and a chloroplast gene tree to identify topological incongruences that may indicate hybridization events in the genus. Furthermore, the monophyly and(More)
— Constrained minimization problems considered here arise in the design of multi-dimensional subspace beam-formers for radar, sonar, seismology, and wireless communications , and in the design of precoders and equalizers for digital communications. The problem is to minimize a quadratic form, under a set of linear or quadratic constraints. We derive the(More)
Using DNA sequence data from nuclear ribosomal ITS in combination with plastid trnLF spacer and trnL intron data, we show that Sibbaldia is a polyphyletic assemblage. It falls into five separate clades of Potentilleae, three within Fragariinae and two within Potentilla (Potentillinae sensu Soják). To a large extent, our results are congruent with Soják’s(More)
A model based method for channel estimation and synchronization in a sevearly doppler spread channel is presented. The model parameters are delay, amplitude and doppler (compression/expansion). The parametrs are succesively determined for a number of signal arrivals starting with the strongest and down to the level that is considered significant for the(More)
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