108 citations · 432 across the 13 of their papers we have counts for
14 papers
A Singular-value-based Marker for the Detection of Atrial Fibrillation Using High-resolution Electrograms and Multi-lead ECG
Hanie Moghaddasi, Richard C. Hendriks, Borbala Hunyadi +4
The severity of atrial fibrillation (AF) can be assessed from intra-operative epicardial measurements (high-resolution electrograms), using metrics such as conduction block (CB) an…
Delay Estimation for Ranging and Localization Using Multiband Channel State Information
Tarik Kazaz, Gerard J. M. Janssen, Jac Romme +1
In wireless networks, an essential step for precise range-based localization is the high-resolution estimation of multipath channel delays. The resolution of traditional delay esti…
Relative kinematics of an anchorless network
Raj Thilak Rajan, Geert Leus, Alle-Jan van der Veen
Estimating the location of N coordinates in a P dimensional Euclidean space from pairwise distances (or proximity measurements), is a principal challenge in a wide variety of field…
Constrained Least Squares for Extended Complex Factor Analysis
Ahmad Mouri Sardarabadi, Alle-Jan van der Veen, L. V. E. Koopmans
For subspace estimation with an unknown colored noise, Factor Analysis (FA) is a good candidate for replacing the popular eigenvalue decomposition (EVD). Finding the unknowns in fa…
Space-based Aperture Array For Ultra-Long Wavelength Radio Astronomy
Raj Thilak Rajan, Albert-Jan Boonstra, Mark Bentum +5
The past decade has seen the rise of various radio astronomy arrays, particularly for low-frequency observations below 100MHz. These developments have been primarily driven by inte…
Joint ranging and synchronization for an anchorless network of mobile nodes
Raj Thilak Rajan, Alle-Jan van der Veen
Synchronization and localization are critical challenges for the coherent functioning of a wireless network, which are conventionally solved independently. Recently, various estima…
Joint non-linear ranging and affine synchronization basis for a network of mobile nodes
Raj Thilak Rajan, Alle-Jan van der Veen
Synchronization and localization are critical challenges for the coherent functioning of a wireless network of mobile nodes. In this paper, a novel joint non-linear range and affin…
Joint relative position and velocity estimation for an anchorless network of mobile nodes
Raj Thilak Rajan, Geert Leus, Alle-Jan van der Veen
Localization is a fundamental challenge for any wireless network of nodes, in particular when the nodes are mobile. We present an extension of the classical Multidimensional scalin…
60 GHz Wireless Link Within Metal Enclosures: Channel Measurements and System Analysis
Seyran Khademi, Sundeep Prabhakar Chepuri, Zoubir Irahhauten +2
Wireless channel measurement results for 60 GHz within a closed metal cabinet are provided. A metal cabinet is chosen to emulate the environment within a mechatronic system, which…
Rigid Body Localization Using Sensor Networks: Position and Orientation Estimation
Sundeep Prabhakar Chepuri, Geert Leus, Alle-Jan van der Veen
In this paper, we propose a novel framework called rigid body localization for joint position and orientation estimation of a rigid body. We consider a setup in which a few sensors…
Calibration Challenges for Future Radio Telescopes
Stefan J. Wijnholds, Sebastiaan van der Tol, Ronald Nijboer +1
Instruments for radio astronomical observations have come a long way. While the first telescopes were based on very large dishes and 2-antenna interferometers, current instruments…
Self-Calibration of Radio Astronomical Arrays With Non-Diagonal Noise Covariance Matrix
Stefan J. Wijnholds, Alle-Jan van der Veen
The radio astronomy community is currently building a number of phased array telescopes. The calibration of these telescopes is hampered by the fact that covariances of signals fro…
Fundamental Imaging Limits of Radio Telescope Arrays
Stefan J. Wijnholds, Alle-Jan van der Veen
The fidelity of radio astronomical images is generally assessed by practical experience, i.e. using rules of thumb, although some aspects and cases have been treated rigorously. In…
Multisource Self-calibration for Sensor Arrays
Stefan J. Wijnholds, Alle-Jan van der Veen
Calibration of a sensor array is more involved if the antennas have direction dependent gains and multiple calibrator sources are simultaneously present. We study this case for a s…