A computationally simple direction-of-arrival (DOA) estimation method with good statistical performance is attractive in many practical applications of array processing. In this paper, we propose a new computationally efficient subspace-based method without eigendecomposition (SUMWE) for the coherent narrowband signals impinging on a uniform linear array (ULA) by exploiting the array geometry a...

Sparse array (SA) geometries, such as coprime and nested arrays, can be regarded a concatenation of two uniform linear arrays (ULAs). Such lead to significant increase the number degrees freedom (DOF) when second-order information is utilized, i.e., they provide long virtual difference coarray (DCA). Thus, idea this paper based on observation that SAs fitted through sub-ULAs. A corresponding SA...

When the uniform circular array (UCA) is used to estimate the direction-of-arrival (DOA) of the coherent sources, it is necessary to transform the UCA data to the interpolated uniform linear array (ULA) data. Thus, the transformed array data can be applied to the spatial processing algorithm for the coherent sources such as the forward-backward smoothing algorithm. To select a more robust trans...

Abstract—Multiple-input multiple-output (MIMO) radar has received increasing attention in recent years. MIMO radar has many advantages over conventional phased array radar such as target detection,resolution enhancement, and interference suppression. In this paper, the results are presented from a simulation study of MIMO uniformly-spaced linear array (ULA) antennas. The performance is investig...

In this work, we present a direction-of-arrival (DOA) estimation method for narrowband sources impinging from the far-field on a uniform linear array (ULA) of sensors, based on the multichannel compressed sensing (CS) framework. We discretize the angular space uniformly into a grid of possible locations, which is much larger than the number of sensors, and assume that only a few of them will co...

An acoustic electronic scanning array for acquiring images from a person using a biometric application is developed. Based on pulse-echo techniques, multifrequency acoustic images are obtained for a set of positions of a person (front, front with arms outstretched, back and side). Two Uniform Linear Arrays (ULA) with 15 λ/2-equispaced sensors have been employed, using different spatial aperture...

This paper presents the use of Inverse Free Krylov Subspace Algorithm (IFKSA) with Estimation of Signal Parameters via Rotational Invariance Technique (ESPRIT) for the Direction-of-Arrival (DOA) estimation under element failure in a Uniform Linear Antenna Array (ULA). Failure of a few elements results in sparse signal space. IFKSA algorithm is an iterative algorithm to find the dominant eigenva...

Abstract—Locating Radio Controlled (RC) devices using their unintended emissions has a great interest considering security concerns. Weak nature of these emissions requires near field localization approach since it is hard to detect these signals in far field region of array. Instead of only angle estimation, near field localization also requires range estimation of the source which makes this ...

In this paper, we present a novel design approach for wideband non-uniformly spaced linear array (NUSLA) to suppress the effect of interference signals. Notably, uniform (ULA), which is easy handle, widely utilized generate nulls over wide band; however, its beamforming performance limited owing ULA structure. Although NUSLA with nonlinear spacing addresses problems that are difficult handle ma...

Mutual coupling between antenna array elements will significantly degrade the performance of signal processing methods. Due to Toeplitz structure mutual matrix (MCM), there exist some calibration algorithms for uniform linear (ULA) or circular (UCA). But few methods other arrays. In this letter, we derive a new transformation formula MCM 7-elements hexagonal (HA-7). Further, extend two auto-cal...