基于ISAR像序列的錐體目標(biāo)進(jìn)動(dòng)及結(jié)構(gòu)參數(shù)估計(jì)
doi: 10.11999/JEIT141061
基金項(xiàng)目:
國家自然科學(xué)基金青年基金(51307004)資助課題
Precession and Structure Parameters Estimation of Precession Cone Target Based on ISAR Image Sequence
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摘要: 彈道目標(biāo)進(jìn)動(dòng)及結(jié)構(gòu)參數(shù)的提取是彈道導(dǎo)彈目標(biāo)識(shí)別的關(guān)鍵。該文提出一種基于逆合成孔徑雷達(dá)(ISAR)像序列實(shí)現(xiàn)錐體目標(biāo)進(jìn)動(dòng)及結(jié)構(gòu)參數(shù)估計(jì)的方法?；陔姶欧抡鏀?shù)據(jù)及錐體目標(biāo)的微動(dòng)特性，忽略旋轉(zhuǎn)對稱錐體目標(biāo)的自旋運(yùn)動(dòng)，采用距離-瞬時(shí)多普勒算法生成目標(biāo)的ISAR像序列，之后采用CLEAN算法將ISAR像序列中的強(qiáng)散射源坐標(biāo)信息提取出來；推導(dǎo)了錐體滑動(dòng)型強(qiáng)散射源在成像平面上的投影軌跡公式，該公式可為進(jìn)動(dòng)錐體目標(biāo)成像特性模擬及參數(shù)估計(jì)提供數(shù)學(xué)參考。分析觀察視角對錐體目標(biāo)ISAR像可觀測強(qiáng)散射源的影響，給出了估計(jì)進(jìn)動(dòng)及結(jié)構(gòu)參數(shù)的具體方法；最后仿真驗(yàn)證了成像算法及投影軌跡公式的正確性，并依據(jù)提取的坐標(biāo)信息估計(jì)目標(biāo)的進(jìn)動(dòng)及結(jié)構(gòu)參數(shù)信息。
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關(guān)鍵詞:
- 信號(hào)處理 /
- 進(jìn)動(dòng)錐體目標(biāo) /
- ISAR像序列 /
- 滑動(dòng)型強(qiáng)散射源 /
- 參數(shù)估計(jì)
Abstract: The extraction of the procession and structure parameters for ballistic targets is a critical point for success of the ballistic target identification. This paper proposes a method to deduct the procession and structure parameters of a cone target based on the Inverse Synthetic Aperture Radar (ISAR) sequences. The time-frequency ISARs of the symmetrical cone target are simulated by the range-instantaneous Doppler algorithm, which is based on the electromagnetic simulation data and micro-motion characteristics of the cone target, and the spin motion of the rotational symmetry cone target is ignored. The location information of strong scattering sources is extracted by the CLEAN algorithm besides; the formula of the projection of the slip-type strong scattering sources on the imaging plane is deduced, which can provide mathematics reference for the imaging simulation and parameter estimation of the precession cone target. The strong scattering sources affected by viewing angle is analyzed and the method of inversion of the procession and structure parameters is given. Finally, the simulation result shows that the imaging algorithm and the formula of the projection of the slip-type strong scattering sources on the imaging plane are correct, the procession and structure parameters are inverted by the location information of the strong scattering sources obtained. -
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