68 citations · 236 across the 9 of their papers we have counts for
9 papers
The science case and challenges of space-borne sub-millimeter interferometry
Leonid I. Gurvits, Zsolt Paragi, Ricardo I. Amils +51
Ultra-high angular resolution in astronomy has always been an important vehicle for making fundamental discoveries. Recent results in direct imaging of the vicinity of the supermas…
A Roadmap towards a Space-based Radio Telescope for Ultra-Low Frequency Radio Astronomy
M. J. Bentum, M. K. Verma, R. T. Rajan +10
The past two decades saw a renewed interest in low frequency radio astronomy, with a particular focus on frequencies above 30 MHz. However, at frequencies below 30 MHz, Earth-based…
Multiresolution time-of-arrival estimation from multiband radio channel measurements
Tarik Kazaz, Raj Thilak Rajan, Gerard J. M. Janssen +1
Achieving high resolution time-of-arrival (TOA) estimation in multipath propagation scenarios from bandlimited observations of communication signals is challenging because the mult…
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…
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…
Cramer Rao Lower Bound for Underwater Range Estimation with Noisy Sound Speed Profile
Hamid Ramezani, Raj Thilak Rajan, Geert Leus
In this paper, the Cramer Rao bound (CRB) for range estimation between two underwater nodes is calculated under a Gaussian noise assumption on the measurements. The nodes can measu…
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…