Search Results - "Koivunen, V."

Autocorrelation-Based Decentralized Sequential Detection of OFDM Signals in Cognitive Radios by Chaudhari, S., Koivunen, V., Poor, H.V.

“…This paper introduces a simple and computationally efficient spectrum sensing scheme for Orthogonal Frequency Division Multiplexing (OFDM) based primary user…”
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Complex Elliptically Symmetric Distributions: Survey, New Results and Applications by Ollila, E., Tyler, D. E., Koivunen, V., Poor, H. V.

“…Complex elliptically symmetric (CES) distributions have been widely used in various engineering applications for which non-Gaussian models are needed. In this…”
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Collaborative Cyclostationary Spectrum Sensing for Cognitive Radio Systems by Lunden, J., Koivunen, V., Huttunen, A., Poor, H.V.

“…This paper proposes an energy efficient collaborative cyclostationary spectrum sensing approach for cognitive radio systems. An existing statistical hypothesis…”
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Toe pressure and toe brachial index are predictive of cardiovascular mortality regardless of the most diseased arterial segment in symptomatic lower-extremity artery disease-A retrospective cohort study by Koivunen, V, Juonala, M, Venermo, M, Laivuori, M, Jalkanen, J M, Hakovirta, H H

“…Although lower extremity arterial disease (LEAD) is most often multisegmental, the predominant disease location and risk factors differ between patients…”
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Detection and Tracking of MIMO Propagation Path Parameters Using State-Space Approach by Salmi, J., Richter, A., Koivunen, V.

“…This paper describes a novel approach for detection, estimation and tracking of multiple-input multiple-output (MIMO) radio propagation parameters from…”
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DoA Estimation Via Manifold Separation for Arbitrary Array Structures by Belloni, F., Richter, A., Koivunen, V.

“…In this paper, we consider the manifold separation technique (MST), which stems from the wavefield modeling formalism developed for array processing. MST is a…”
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Complex random vectors and ICA models: identifiability, uniqueness, and separability by Eriksson, J., Koivunen, V.

“…In this paper, the conditions for identifiability, separability and uniqueness of linear complex valued independent component analysis (ICA) models are…”
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Automatic Radar Waveform Recognition by Lunden, J., Koivunen, V.

“…In this paper, a system for automatically recognizing radar waveforms is introduced. This type of techniques are needed in various spectrum management,…”
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Advanced methods for I/Q imbalance compensation in communication receivers by Valkama, M., Renfors, M., Koivunen, V.

“…I/Q signal processing is widely utilized in today's communication receivers. However, all I/Q processing receiver structures, such as the low-IF receiver, face…”
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Steepest Descent Algorithms for Optimization Under Unitary Matrix Constraint by Abrudan, T.E., Eriksson, J., Koivunen, V.

“…In many engineering applications we deal with constrained optimization problems with respect to complex-valued matrices. This paper proposes a Riemannian…”
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Beamspace Transform for UCA: Error Analysis and Bias Reduction by Belloni, F., Koivunen, V.

“…In this paper, we analyze the error caused by the beamspace transform (BT) when it is applied to uniform circular array (UCA) configuration. Several algorithms…”
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Sequential Unfolding SVD for Tensors With Applications in Array Signal Processing by Salmi, J., Richter, A., Koivunen, V.

“…This paper contributes to the field of higher order ( N > 2) tensor decompositions in signal processing. A novel PARATREE tensor model is introduced,…”
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Effects of heavy metal pollution on red wood ant ( Formica s. str.) populations by Eeva, T., Sorvari, J., Koivunen, V.

“…We studied the species composition, mound population densities, relative abundance and colony sizes of red wood ants along a well known air pollution gradient…”
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Alcohol intoxication and lack of helmet use are common in Electric Scooter related Traumatic Brain Injuries: a consecutive patient series from a tertiary university hospital by Suominen, E., Sajanti, A., Silver, E., Koivunen, V., Bondfolk, A., Koskimäki, J., Saarinen, A.

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Identifiability, separability, and uniqueness of linear ICA models by Eriksson, J., Koivunen, V.

“…In this letter, we give the conditions for identifiability, separability and uniqueness of linear real valued independent component analysis (ICA) models. A…”
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Blind signal estimation in conjugate signal models with application to I/Q imbalance compensation by Valkama, M., Renfors, M., Koivunen, V.

“…This letter addresses the blind signal estimation problem in the so-called conjugate signal model, where the observed signal is a linear combination of the…”
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Blind Frequency Synchronization in OFDM via Diagonality Criterion by Roman, T., Visuri, S., Koivunen, V.

“…In this paper, we address the problem of blind carrier frequency offset (CFO) estimation in orthogonal frequency-division multiplexing (OFDM) systems in the…”
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Influence Function and Asymptotic Efficiency of Scatter Matrix Based Array Processors: Case MVDR Beamformer by Ollila, E., Koivunen, V.

“…In this paper, we consider array processors that are scale-invariant functions of the array covariance matrix. The emphasis is on Capon's MVDR beamformer. We…”
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Householder Multistage Wiener Filter for Space-Time Navigation Receivers by Werner, S., With, M., Koivunen, V.

“…Space-time (ST) processing in navigation receivers is attractive technology because it provides a sufficient number of degrees of freedom for cancelling a…”
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Subspace-based direction-of-arrival estimation using nonparametric statistics by Visuri, S., Oja, H., Koivunen, V.

“…The problem of subspace estimation using multivariate nonparametric statistics is addressed. We introduce new high-resolution direction-of-arrival (DOA)…”
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