Range-Angle Localization of Targets With Planar Frequency Diverse Subaperturing MIMO Radar

Li, Xingxing; Wang, Dangwei; Wang, Wen-Qin; Liu, Weijian; Xiao-yan, MA

doi:10.1109/access.2018.2810139

Cited by 18 publications

(9 citation statements)

References 38 publications

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“…Nearly all of the aforementioned sparse geometries and FO designs have been investigated for only 1-D arrays. Some 2-D planar FDA arrays were considered in [32,33] for retrieving both azimuth and elevation angles but these configurations are overly complex.…”

Section: Introductionmentioning

confidence: 99%

Co-Pulsing FDA Radar

Lv¹,

Mishra²,

Chen³

2022

Preprint

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Target localization based on frequency diverse array (FDA) radar has lately garnered significant research interest. A linear frequency offset (FO) across FDA antennas yields a range-angle dependent beampattern that allows for joint estimation of range and direction-of-arrival (DoA). Prior works on FDA largely focus on the one-dimensional linear array to estimate only azimuth angle and range while ignoring the elevation and Doppler velocity. However, in many applications, the latter two parameters are also essential for target localization. Further, there is also an interest in radar systems that employ fewer measurements in temporal, Doppler, or spatial signal domains. We address these multiple challenges by proposing a co-prime L-Shaped FDA, wherein co-prime FOs are applied across the elements of L-shaped co-prime array and each element transmits at a non-uniform co-prime pulse repetition interval (C 3 or C-Cube). This co-pulsing FDA yields significantly large degrees-of-freedom (DoFs) for target localization in the range-azimuth-elevation-Doppler domain while also reducing the time-on-target and transmit spectral usage. By exploiting these DoFs, we develop C-Cube auto-pairing (CCing) algorithm, in which all the parameters are ipso facto paired during a joint estimation. We show that C-Cube FDA requires at least 2 √ Q + 1 − 1 antenna elements and 2 √ Q + 1 − 1 pulses to guarantee perfect recovery of Q targets as against Q + 1 elements and Q + 1 pulses required by both L-shaped uniform linear array and L-shaped linear FO FDA with uniform pulsing. Numerical experiments with our CCing algorithm show great performance improvements in parameter recovery, wherein C-Cube radar achieves at least 15% higher target hit-rate with shorter dwell time than its uniform counterparts.

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Section: Introductionmentioning

confidence: 99%

Co-Pulsing FDA Radar

Lv¹,

Mishra²,

Chen³

2022

Preprint

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“…By utilizing the DOFs in the transmit, receive and pulse dimensions, an enhanced three‐dimensional localization method is proposed in Reference 21, based on FDA‐MIMO radar. By analyzing the planar frequency diverse subaperturing MIMO radar, a multiple‐target 3‐D localization approach is presented in Reference 22. Combining the space‐time adaptive processing (STAP) technique with FDA radar, a space‐time‐range adaptive processing approach is proposed 23 .…”

Section: Introductionmentioning

confidence: 99%

Range‐angle target indication using FDA‐MIMO with sinusoidal element spacing

Tan

Wang

2020

Int J RF Microw Comput Aided Eng

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By introducing a tiny frequency increment across the array elements, frequency diverse array (FDA) radar produces a range-angle-dependent beampattern. However, the range-angle coupling and time-variant problem block the application potential of the conventional FDA. Employing sinusoidal element spacing and symmetrical sinusoidal modulated frequency offsets, a novel scheme termed as Sin-FDA is proposed. To eliminate the time-varying effect, multiple-input multiple-output technique and multiple matched filters at receiver are adopted. The proposed scheme can generate a pencil-shaped beampattern with smaller spatial region of mainlobe in range-angle domains, which is helpful for improving the target indication performance. Furthermore, the beampattern produced by the proposed scheme has narrower mainlobe both in the range and angle dimensions as well as acceptable sidelobe level. The exploration of nonuniform element spacing can better direct the range-angle decoupled beampattern design for FDA radar. Simulation results validate the superiority of the proposed scheme over the existing decoupled FDA systems.

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“…As far as the authors know, existing mixed targets localization methods with phased array (PA) mentioned above just consider the DOAs for all targets and ranges for near-field targets, while frequency diverse array (FDA) [16][17][18][19] owing time-angle-range-dependent beampattern is different from PA, FDA has capacity for joint estimating both the DOAs and ranges of all targets. Due to its angle-range-dependent beampattern characteristics, FDA has been suggested for radar imaging [20,21], wireless communication [22], target localization [23][24][25][26][27][28][29], and target tracking [30]. The paper [31] proposed an equivalent transmit beamforming method in joint range and angle domains at the receiver of the collocated transmit-receive system where FDA acts as transmit antenna.…”

Section: Introductionmentioning

confidence: 99%

Mixed targets localization using symmetric nested frequency diverse array radar

Chen

Wang

2020

IET Signal Processing

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A mixed near-field and far-field targets localization method based on sparse signal reconstruction and subspace method is presented, which can obtain both direction-of-arrival (DOA) and range information of the targets by utilizing symmetric nested frequency diverse array (SNFDA). Due to the frequency diverse array (FDA) owing time-angle-range-dependent beampattern, the authors first properly design frequency increments and choose the sensor outputs to construct a fourth-order cumulant matrix of SNFDA which is only related to DOAs of targets, and the authors estimate the DOAs of all targets by solving the ℓ 1-norm minimization convex optimization problem. Then a mixed range-dependent overcomplete dictionary with DOAs estimation is formulated in the compressive sensing framework to classify targets types by using periodic characteristics of the estimated range-dependent beampattern. Finally, the range estimations of all targets are obtained via 1-D range-domain spectral searching. Compared with the existing mixed near-field and far-field targets localization methods, the proposed method jointly uses FDA angle-range-dependent beampattern and increased degrees-of-freedom of nested array, which can achieve both improved resolutions and accuracies in DOAs and ranges estimation for all targets. A set of numerical examples is reported and discussed to validate the superiority of the proposed algorithm. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Range-Angle Localization of Targets With Planar Frequency Diverse Subaperturing MIMO Radar

Cited by 18 publications

References 38 publications

Co-Pulsing FDA Radar

Co-Pulsing FDA Radar

Range‐angle target indication using FDA‐MIMO with sinusoidal element spacing

Mixed targets localization using symmetric nested frequency diverse array radar

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