Improved Method of Direction Finding for Non Circular Signals with Wavelet Denoising Using Three Parallel Uniform Linear Arrays

Kumar, G. Pramod; Palanisamy, P.; Amiri, Iraj Sadegh

doi:10.1007/s11277-020-07571-0

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…The CCD polarization model of two-component vector arrays was created in (Chen et al, 2019), and the proposed AQ-ESPRIT algorithm has better performance than other ESPRIT variants in low signal-to-noise ratio (SNR) scenarios. In addition, the PM-based 2-D DOA estimation method of NC signals (Gowri, Palanisamy & Amiri, 2020) and the quaternion orthogonal propagation method (OPM)-like algorithm (Lou et al, 2021) have been developed.…”

Section: Intruductionmentioning

confidence: 99%

Geometric Algebra based 2D-DOA Estimation for Non-circular Signals with an Electromagnetic Vector Array

Wang,

Feng,

et al. 2024

Digital Signal Processing

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Section: Intruductionmentioning

confidence: 99%

Geometric Algebra based 2D-DOA Estimation for Non-circular Signals with an Electromagnetic Vector Array

Wang,

Feng,

et al. 2024

Digital Signal Processing

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“…Notably, all the NULA structures mentioned above are mainly designed to resolve the circular sources (CS). However, many non-circular sources (NCSs) exist practically [33,34]. The NCS contain more information than its circular counterparts.…”

Section: Introductionmentioning

confidence: 99%

Triad-Displaced ULAs Configuration for Non-Circular Sources with Larger Continuous Virtual Aperture and Enhanced Degrees of Freedom

Hayee

Dang

Huang

2024

J. of Syst. Eng. Electron.

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Non-uniform linear array (NULA) configurations are well renowned due to their structural ability for providing increased degrees of freedom (DOF) and wider array aperture than uniform linear arrays (ULAs). These characteristics play a significant role in improving the direction-of-arrival (DOA) estimation accuracy. However, most of the existing NULA geometries are primarily applicable to circular sources (CSs), while they limitedly improve the DOF and continuous virtual aperture for noncircular sources (NCSs). Toward this purpose, we present a triaddisplaced ULAs (Tdis-ULAs) configuration for NCS. The Tdis-ULAs structure generally consists of three ULAs, which are appropriately placed. The proposed antenna array approach fully exploits the non-circular characteristics of the sources. Given the same number of elements, the Tdis-ULAs design achieves more DOF and larger hole-free co-array aperture than its sparse array competitors. Advantageously, the number of uniform DOF, optimal distribution of elements among the ULAs, and precise element positions are uniquely determined by the closed-form expressions. Moreover, the proposed array also produces a filled resulting co-array. Numerical simulations are conducted to show the performance advantages of the proposed Tdis-ULAs configuration over its counterpart designs.

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“…Spectral multiple signal classification (MUSIC), root MUSIC, expectation-maximization (EM) [13,14], etc., are some of the successful algorithms applied to direction estimation in non-uniform linear arrays. Several techniques, including array interpolation, polynomial approach, and adaptive filtering, are used to estimate DOAs for the arbitrary array structures [15,16,17,18]. But the effect of array model errors is rarely discussed in the case of non-uniform array structures.…”

Section: Introductionmentioning

confidence: 99%

Direction-of-Arrival Estimation in Non-uniform Linear Array with Gain-Phase Error Compensation

Natarajamani

Kirthiga

2023

Wireless Pers Commun

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Gain and phase error sensitivity of the array output is common to all high-resolution direction of arrival estimators. In this paper, we addressed the estimation of directions of arrival of multiple signals impinging on a non-uniform linear array in the presence of gain and phase perturbations.The effect of amplitude and phase distortion on a non-uniform array with defective or missing elements is considered. An iteration method is proposed to estimate and compensate for these errors to ensure maximum accuracy in DOA estimation. Computer simulations are shown to verify the efficacy of the proposed algorithm with the presence of array distortions.

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Improved Method of Direction Finding for Non Circular Signals with Wavelet Denoising Using Three Parallel Uniform Linear Arrays

Cited by 6 publications

References 18 publications

Geometric Algebra based 2D-DOA Estimation for Non-circular Signals with an Electromagnetic Vector Array

Geometric Algebra based 2D-DOA Estimation for Non-circular Signals with an Electromagnetic Vector Array

Triad-Displaced ULAs Configuration for Non-Circular Sources with Larger Continuous Virtual Aperture and Enhanced Degrees of Freedom

Direction-of-Arrival Estimation in Non-uniform Linear Array with Gain-Phase Error Compensation

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