Subspace-Based Method for Direction Finding of Multiple Partially Polarized Signals
Sign Up to like & getrecommendations! Published in 2018 at "Chinese Journal of Electronics"
DOI: 10.1049/cje.2017.11.011
Abstract: We investigate the problem of direction finding for multiple Partially polarized (PP) electromagnetic signals, each of which possesses two spatial degrees of freedom. We use a uniform linear array of L sensors, where each consists… read more here.
Keywords: direction finding; partially polarized; direction; subspace based ... See more keywords
Direction finding based on TMAs with reconfigurable angle-searching range and bearing accuracy
Sign Up to like & getrecommendations! Published in 2017 at "Electronics Letters"
DOI: 10.1049/el.2016.3932
Abstract: A direction-finding technique based on time-modulated arrays (TMAs) is presented. Signals radiated/received by the TMAs with moving phase centre suffer from the Doppler effect and the shifted frequency is direction-dependent. This interesting property allows TMAs… read more here.
Keywords: direction finding; range bearing; direction; reconfigurable angle ... See more keywords
Approximate Closed-Form TDOA-Based Estimator for Acoustic Direction Finding via Constrained Optimization
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Sensors Journal"
DOI: 10.1109/jsen.2018.2803150
Abstract: This paper focuses on estimating the azimuth and elevation of a sound emitter in 3-D space based on time-difference-of-arrival (TDOA) measurements with an array of acoustic sensors. The TDOA-based direction finding problem is significant because… read more here.
Keywords: direction finding; direction; estimator; tdoa based ... See more keywords
Direction Finding in the Presence of Direction-Dependent Mutual Coupling
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Antennas and Wireless Propagation Letters"
DOI: 10.1109/lawp.2017.2647983
Abstract: Direction-of-arrival (DOA) estimation in the presence of mutual coupling (MC) is an important problem in direction-finding applications. Previous methods in the literature assume that the MC in the array is modeled with a single direction-independent… read more here.
Keywords: direction finding; direction; mutual coupling; direction dependent ... See more keywords
Difference Coarray-Based Direction Finding via Covariance Fitting
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DOI: 10.1109/lcomm.2021.3078877
Abstract: Sparse linear arrays like nested arrays and coprime arrays, can offer more accurate direction-of-arrival estimation than uniform linear arrays by exploiting their difference coarrays. In this letter, we present a new algorithm for direction finding… read more here.
Keywords: covariance; difference coarray; direction finding; direction ... See more keywords
Azimuth-Elevation Direction Finding With a Pair of Acoustic Vector Sensors in the Presence of a Reflecting Boundary
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Signal Processing Letters"
DOI: 10.1109/lsp.2022.3215063
Abstract: This paper is aiming at addressing an azimuth-elevation direction-finding algorithm using a pair of identically oriented acoustic vector sensors located near a reflecting boundary. Two fourth-order cumulant matrices related in terms of a translationally invariant… read more here.
Keywords: elevation direction; azimuth elevation; vector sensors; direction finding ... See more keywords
An L-Shaped Array With Nonorthogonal Axes—Its Cramér–Rao Bound for Direction Finding
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Transactions on Aerospace and Electronic Systems"
DOI: 10.1109/taes.2017.2741298
Abstract: If a nominally L-shaped sensor-array's two legs are not exactly perpendicular, its azimuth-polar direction-of-arrival estimation would be degraded. This paper quantifies this degradation via a deterministic Cramér–Rao bound analysis of the direction-finding error variance. read more here.
Keywords: direction finding; direction; cram rao; rao bound ... See more keywords
Direction Finding in Partly Calibrated Arrays Exploiting the Whole Array Aperture
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Aerospace and Electronic Systems"
DOI: 10.1109/taes.2023.3269736
Abstract: We consider the problem of direction finding using partly calibrated arrays, a distributed subarray with position errors between subarrays. The key challenge is to enhance angular resolution in the presence of position errors. To achieve… read more here.
Keywords: partly calibrated; calibrated arrays; array aperture; direction finding ... See more keywords
Direction Finding and Performance Analysis With 1 bit Time Modulated Array
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Antennas and Propagation"
DOI: 10.1109/tap.2021.3076297
Abstract: A novel single-channel direction finding (DF) method with spatial spectrum estimation is proposed based on 1 bit time-modulated array (TMA). Its performance is analyzed from theoretical derivation to numerical simulations and compared with other existing… read more here.
Keywords: time; performance; direction finding; time modulated ... See more keywords
The hybrid Cramer-Rao bound of direction finding by a uniform circular array of isotropic sensors that suffer stochastic dislocations
Sign Up to like & getrecommendations! Published in 2017 at "Journal of the Acoustical Society of America"
DOI: 10.1121/1.5014336
Abstract: Consider azimuth-elevation direction finding by a uniform circular array of isotropic sensors. In the real world, the sensors may dislocate from their nominal positions. These dislocations could be modeled as random variables having an a… read more here.
Keywords: direction finding; hybrid cramer; cramer rao;
Covariance Matrix Reconstruction for Direction Finding with Nested Arrays Using Iterative Reweighted Nuclear Norm Minimization
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Antennas and Propagation"
DOI: 10.1155/2019/7657898
Abstract: In this paper, we address the direction finding problem in the background of unknown nonuniform noise with nested array. A novel gridless direction finding method is proposed via the low-rank covariance matrix approximation, which is… read more here.
Keywords: direction finding; nuclear norm; covariance matrix; reweighted nuclear ... See more keywords