2014
DOI: 10.1109/tgrs.2013.2251348
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ISAR Imaging of a Ship Target Based on Parameter Estimation of Multicomponent Quadratic Frequency-Modulated Signals

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Cited by 113 publications
(118 citation statements)
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“…In ISAR imaging for targets with complex motions, however, azimuth echoes have to be modeled as cubic phase signals (CPSs) instead of LFM signals [12]- [18]. Compared to the LFM signal model, the CPS model can handle both slowly maneuvering targets and targets with complex motions [17], [18] and is more accurate in realistic ISAR imaging applications of nonuniformly rotating targets. For the CPS model, the above estimation algorithms for the LFM signal are no longer applicable [12]- [22].…”
mentioning
confidence: 99%
“…In ISAR imaging for targets with complex motions, however, azimuth echoes have to be modeled as cubic phase signals (CPSs) instead of LFM signals [12]- [18]. Compared to the LFM signal model, the CPS model can handle both slowly maneuvering targets and targets with complex motions [17], [18] and is more accurate in realistic ISAR imaging applications of nonuniformly rotating targets. For the CPS model, the above estimation algorithms for the LFM signal are no longer applicable [12]- [22].…”
mentioning
confidence: 99%
“…In this case, coefficients of the CPF signal are estimated. According to previous studies, several algorithms for quadratic and cubic coefficient estimation can be retrieved, such as higher-order ambiguity function-integrated cubic phase function [34], scaled Fourier transform [35], keystone time-chirp rate distribution (KTCRD) [12], and chirp rate-quadratic chirp rate distribution [13]. Similarly, these algorithms transform a discrete signal into a two-dimensional parameter domain whose two dimensions represent quadratic and cubic coefficients, respectively.…”
Section: Properties Of the Pps And Rotational Nonuniformity Estimationmentioning
confidence: 99%
“…In this section, we will employ the analytical method utilized in Ref. 34 to discuss the selection criterion of the zoom factor ξ in detail.…”
Section: Selection Criterion Of the Zoom Factormentioning
confidence: 99%
“…Based on the analyses in Ref. 34, in order to obtain a balance between Eq. (11) and the estimation precision, 11,29 we suggest ξ ¼ 4F ϒ ∕N for CFCRD.…”
mentioning
confidence: 99%