一種SAR分布目標(biāo)可分辨概率精確計(jì)算方法
doi: 10.11999/JEIT180294
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1.
中國科學(xué)院電子學(xué)研究所 ??北京 ??100190
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2.
中國科學(xué)院大學(xué) ??北京 ??100049
基金項(xiàng)目: 國家自然科學(xué)基金(61471340),國家重點(diǎn)研發(fā)計(jì)劃(2017YFB0503001)
A Precise Method for Calculating the Resolution of SAR Distribution Targets
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1.
Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
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2.
University of Chinese Academy of Sciences, Beijing 100049, China
Funds: The National Natural Science Foundation of China (61471340), The National Key Research and Development Program (2017YFB0503001)
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摘要: 可分辨概率是用來衡量SAR分布目標(biāo)分辨特性的重要指標(biāo)。該文在細(xì)化目標(biāo)可分辨條件的基礎(chǔ)上,結(jié)合SAR分布目標(biāo)統(tǒng)計(jì)特性,提出一種新的目標(biāo)可分辨判斷準(zhǔn)則,給出一種可分辨概率精確計(jì)算方法。同時(shí)為了簡化計(jì)算,給出計(jì)算復(fù)雜度更小的近似計(jì)算方法。仿真結(jié)果表明,該文提出的可分辨概率計(jì)算方法符合實(shí)際情況,能夠更真實(shí)地反映SAR分布目標(biāo)統(tǒng)計(jì)特性對分辨特性的影響,可為SAR圖像質(zhì)量評估和系統(tǒng)參數(shù)設(shè)計(jì)等提供理論支撐。
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關(guān)鍵詞:
- SAR /
- 分布目標(biāo) /
- 可分辨概率 /
- 統(tǒng)計(jì)特性 /
- 反射強(qiáng)度
Abstract: The separable probability is a significant criterion to evaluate the resolution characteristics of SAR distribution targets. On the basis of refining the separable condition of targets and taking the statistic characteristic of SAR distribution targets into consideration, a new separable judgment criterion for targets is proposed, and a precise calculation method of the separable probability is deduced. Besides, in order to simplify the calculation, the approximate calculation method with less computational complexity is presented. It is shown in the simulation results that the proposed method is in accordance with the actual situation, which can reflect the effect of the statistic characteristic of SAR distribution target on the resolution characteristic, and can provide theoretical support for the SAR image quality evaluation and system parameter design.-
Key words:
- SAR /
- Distributed targets /
- Separable probability /
- Statistical properties /
- Reflective intensity
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