基于復(fù)合高斯雜波紋理結(jié)構(gòu)的相干檢測(cè)
doi: 10.11999/JEIT151194
基金項(xiàng)目:
國(guó)家自然科學(xué)基金(61201296)
Coherent Detection Based on Texture Structure in Compound-Gaussian Clutter
Funds:
The National Natural Science Foundation of China (61201296)
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摘要: 傳統(tǒng)的自適應(yīng)檢測(cè)器大多是在獨(dú)立同分布紋理的前提下推導(dǎo)出的。然而，實(shí)測(cè)海雜波數(shù)據(jù)中各個(gè)距離單元的紋理具有相關(guān)性。該文將這一紋理相關(guān)性的信息加入到似然比檢測(cè)中，提出一種基于紋理結(jié)構(gòu)的相干檢測(cè)器?；谟坷苏{(diào)制在距離上產(chǎn)生紋理相關(guān)性的先驗(yàn)知識(shí)，確定與待檢測(cè)單元紋理相關(guān)的距離單元數(shù)目，據(jù)此可以提供待測(cè)單元的紋理信息。實(shí)測(cè)數(shù)據(jù)實(shí)驗(yàn)表明，該檢測(cè)器相對(duì)于逆伽馬紋理復(fù)合高斯雜波下最優(yōu)檢測(cè)器具有一定的性能提升。
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關(guān)鍵詞:
- 海雜波 /
- 復(fù)合高斯模型 /
- 紋理相關(guān)性 /
- 自適應(yīng)檢測(cè)
Abstract: Traditional adaptive detectors are mostly derived under the assumption of independent and identically distributed texture. However, the texture correlation along the range cell exists in real sea clutter datasets. A new coherent detector based on texture structure is proposed by adding the information of texture correlation into the likelihood ratio test. Based on the prior knowledge that the texture correlation along range is generated by the swell modulation, the number of range cells related to the texture of the Cell Under Test (CUT) is determined, and this number provides the information for the texture of CUT. Experimental results using real datasets show that the proposed detector has better performance in comparison with the optimal detector in compound-Gaussian clutter with inverse gamma texture.-
Key words:
- Sea clutter /
- Compound-Gaussian model /
- Texture correlation /
- Adaptive detection
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