Results 11 to 20 of about 2,027 (176)

Frequency Diverse Coprime Arrays With Coprime Frequency Offsets for Multitarget Localization

IEEE Journal on Selected Topics in Signal Processing, 2017
Different from conventional phased-array radars, the frequency diverse array (FDA) radar offers a range-dependent beampattern capability that is attractive in various applications. The spatial and range resolutions of an FDA radar are fundamentally limited by the array geometry and the frequency offset.
Si Qin, Yimin D Zhang, Fulvio Gini
exaly   +2 more sources

Passive beamforming with coprime arrays

IET Radar, Sonar and Navigation, 2017
Coprime arrays have been recently proposed as effective sparse configurations suitable for radar beamforming and angle‐of‐arrival estimation applications. In this study, a new approach for passive beamforming using coprime arrays is presented. In particular, a new detection strategy is proposed, which outperforms the coprime processors presently ...
Gerardo Di Martino, Antonio Iodice
exaly   +3 more sources

Minimum Mean-Squared-Error autocorrelation processing in coprime arrays [PDF]

Digital Signal Processing, 2021
Coprime arrays enable Direction-of-Arrival (DoA) estimation of an increased number of sources. To that end, the receiver estimates the autocorrelation matrix of a larger virtual uniform linear array (coarray), by applying selection or averaging to the physical array's autocorrelation estimates, followed by spatial-smoothing.
Dimitris G Chachlakis, Tongdi Zhou, Fauzia Ahmad   +2 more
exaly   +3 more sources

Two-Dimensional DOA Estimation for Coprime Planar Arrays: From Array Structure Design to Dimensionality-Reduction Root MUSIC Algorithm [PDF]

Sensors
This paper proposes a novel sparse array design and an efficient algorithm for two-dimensional direction-of-arrival (2D-DOA) estimation. By analyzing the hole distribution in coprime arrays and introducing supplementary elements, we design a ...
Yunhe Shi, Xiaofei Zhang, Shengxinlai Han   +2 more
doaj   +2 more sources

Symmetry-Imposed Rectangular Coprime and Nested Arrays for Direction of Arrival Estimation With Multiple Signal Classification

IEEE Access, 2019
Linear sparse arrays (coprime and nested arrays) have been studied extensively as a means of performing direction of arrival (DoA) estimation while bypassing Nyquist sampling theorem. However, rectangular sparse arrays have few studies, most of which are
Kaushallya Adhikari, Benjamin Drozdenko
doaj   +3 more sources

Array Diagnosis and DOA Estimation for Coprime Array under Sensor Failures. [PDF]

Sensors (Basel), 2020
A coprime array of N sensors can achieve O ( N 2 ) degrees of freedom (DOFs) by possessing a uniform linear array segment of size O ( N 2 ) in the difference coarray. However, the structure of difference coarray is sensitive to sensor failures.
Sun B, Wu C, Ruan H.
europepmc   +5 more sources

An Underwater Velocity-Independent DOA Estimation Based on Improved Toeplitz Matrix Reconstruction [PDF]

Sensors
Conventional acoustic velocity-independent direction of arrival (DOA) estimation models have limited measurement ranges and low degrees of freedom.
Xuejin Zhao, Zihan Lei, Yu Wang, Gengxin Ning   +3 more
doaj   +2 more sources

Structured autocorrelation matrix estimation for coprime arrays [PDF]

Signal Processing, 2021
A coprime array receiver processes a collection of received-signal snapshots to estimate the autocorrelation matrix of a larger (virtual) uniform linear array, known as coarray. By the received-signal model, this matrix has to be (i) Positive-Definite, (ii) Hermitian, (iii) Toeplitz, and (iv) its noise-subspace eigenvalues have to be equal.
Dimitris G. Chachlakis, Panos P. Markopoulos   +1 more
openaire   +2 more sources

Array gain of coprime arrays [PDF]

The Journal of the Acoustical Society of America, 2019
A coprime array of M + N − 1 elements is designed, using product processing (PP), to yield the same beam width as that of a full array of MN elements using conventional beamforming (CBF), while at the same time suppressing the grating lobes. The array gain (AG) for isotropic noise using conventional PP is slightly less than that obtained using CBF ...
T C, Yang, Zhengzheng, Ye
openaire   +2 more sources

Generalized coprime array configurations [PDF]

2014 IEEE 8th Sensor Array and Multichannel Signal Processing Workshop (SAM), 2014
A coprime array consists of two uniform linear subarrays that construct an effective difference co-array with certain desirable characteristics. In this paper, we propose a generalized coprime array concept through the compression of the interelement spacing of one constituting subarray.
Si Qin, Yimin D. Zhang, Moeness G. Amin
openaire   +1 more source