Nested arrays: A novel approach to array processing with enhanced degrees of freedom

P Pal, PP Vaidyanathan - IEEE Transactions on Signal …, 2010 - ieeexplore.ieee.org
A new array geometry, which is capable of significantly increasing the degrees of freedom of
linear arrays, is proposed. This structure is obtained by systematically nesting two or more …

Thinned arrays using genetic algorithms

RL Haupt - IEEE transactions on antennas and propagation, 1994 - ieeexplore.ieee.org
Large arrays are difficult to thin in order to obtain low sidelobes. Traditional statistical
methods of aperiodic array synthesis fall far short of optimum configurations. Traditional …

Cramér–Rao bounds for coprime and other sparse arrays, which find more sources than sensors

CL Liu, PP Vaidyanathan - Digital Signal Processing, 2017 - Elsevier
Abstract The Cramér–Rao bound (CRB) offers a lower bound on the variances of unbiased
estimates of parameters, eg, directions of arrival (DOA) in array processing. While there exist …

An introduction to genetic algorithms for electromagnetics

RL Haupt - IEEE Antennas and Propagation Magazine, 1995 - ieeexplore.ieee.org
This article is a tutorial on using genetic algorithms to optimize antenna and scattering
patterns. Genetic algorithms are" global" numerical-optimization methods, patterned after the …

Synthesis of unequally spaced arrays by simulated annealing

V Murino, A Trucco… - IEEE Transactions on …, 1996 - ieeexplore.ieee.org
Simulated annealing is applied to the synthesis of arrays in order to reduce the peaks of side
lobes by acting on the elements' positions and weight coefficients. In the case considered …

THz active imaging systems with real-time capabilities

F Friederich, W Von Spiegel, M Bauer… - IEEE Transactions …, 2011 - ieeexplore.ieee.org
This paper presents a survey of the status of five active THz imaging modalities which we
have developed and investigated during the last few years with the goal to explore their …

Nested arrays in two dimensions, Part I: Geometrical considerations

P Pal, PP Vaidyanathan - IEEE Transactions on Signal …, 2012 - ieeexplore.ieee.org
A new class of two dimensional arrays with sensors on lattice (s) is proposed, whose
difference co-array can give rise to a virtual two dimensional array with much larger number …

Hole Identification and Filling in -Times Extended Co-Prime Arrays for Highly Efficient DOA Estimation

X Wang, X Wang - IEEE Transactions on Signal Processing, 2019 - ieeexplore.ieee.org
Among various sparse array techniques, co-prime array is found to be more attractive
because of its higher DoF with a smaller number of sensing elements. Generally, a co-prime …

ESTAR: A synthetic aperture microwave radiometer for remote sensing applications

DM Le Vine, AJ Griffis, CT Swift… - Proceedings of the …, 1994 - ieeexplore.ieee.org
ESTAR represents a new technology being developed for passive microwave remote
sensing of the environment from space. The instrument employs an interferometric …

Multiple Level Nested Array: An Efficient Geometry for th Order Cumulant Based Array Processing

P Pal, PP Vaidyanathan - IEEE Transactions on Signal …, 2011 - ieeexplore.ieee.org
Recently, direction-of-arrival estimation (DOA) algorithms based on arbitrary even-order (2
q) cumulants of the received data have been proposed, giving rise to new DOA estimation …