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dc.creatorZhang, Yimin D.
dc.creatorAhmed, Ammar
dc.creatorHimed, Braham
dc.identifier.citationY. D. Zhang, A. Ahmed and B. Himed, "Target Altitude Estimation in Over-the-Horizon Radar," in IEEE Access, vol. 10, pp. 11260-11273, 2022, doi: 10.1109/ACCESS.2022.3145023.
dc.description.abstractDoppler signatures of local multipath signals provide useful information for target altitude estimation in over-the-horizon radar surveillance. In this paper, we develop a method to improve the resolution of these multipath Doppler signatures and enable enhanced altitude estimation of aircraft target which maintains a constant altitude. Moreover, we consider the impact of ionospheric layer motion on target parameter estimation and show that target parameters can be estimated under both stationary as well as time-varying ionospheric layer conditions. In order to improve the resolution and estimation accuracy of the target parameters and ionosphere velocity with a significantly reduced complexity, we exploit a frequency focused transform to the de-chirped target signals for dimension reduction before applying a least absolute shrinkage and selection operator (LASSO)-based high-resolution spectrum estimation technique. The proposed strategy outperforms fractional Fourier transform and classical subspace-based frequency estimation methods with a much lower computational complexity. The effectiveness of the proposed approach is especially evident for challenging cases where the multipath signal components have spectrally close Doppler signatures. Simulation results confirm the effectiveness of the proposed method.
dc.format.extent14 pages
dc.relation.ispartofFaculty/ Researcher Works
dc.relation.haspartIEEE Access, Vol. 10
dc.relation.isreferencedbyInstitute of Electrical and Electronics Engineers (IEEE)
dc.rightsAttribution CC BY
dc.subjectDoppler signature
dc.subjectDynamic ionosphere
dc.subjectFractional Fourier transform
dc.subjectOver-the-horizon radar
dc.subjectTarget geo-location
dc.subjectTime-frequency analysis.
dc.titleTarget Altitude Estimation in Over-the-Horizon Radar
dc.type.genreJournal article
dc.description.departmentElectrical and Computer Engineering
dc.ada.noteFor Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact
dc.description.schoolcollegeTemple University. College of Engineering
dc.temple.creatorZhang, Yimin D.

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