一種距離擴(kuò)展目標(biāo)的Hough變換檢測(cè)器
doi: 10.11999/JEIT140692
基金項(xiàng)目:
國(guó)家自然科學(xué)基金(60901067, 61001212, 61201284), 新世紀(jì)優(yōu)秀人才支持計(jì)劃(NCET-09-0630)及長(zhǎng)江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃(IRT0954)資助課題
A Hough Transformation Detector for Range Spread Target
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摘要: 針對(duì)寬帶雷達(dá)信號(hào)得到的距離擴(kuò)展目標(biāo)在有較大運(yùn)動(dòng)速度時(shí)積累檢測(cè)困難的問(wèn)題，該文提出一種基于Hough變換的檢測(cè)器(HTD)。利用距離擴(kuò)展目標(biāo)高分辨距離像信號(hào)的相鄰回波之間信號(hào)具有較大相關(guān)系數(shù)這一特點(diǎn)，在互相關(guān)序號(hào)與相關(guān)時(shí)間2維平面使用Hough變換進(jìn)行積累來(lái)檢測(cè)目標(biāo)。理論推導(dǎo)表明Hough變換檢測(cè)器不需要目標(biāo)散射中心分布的先驗(yàn)知識(shí)和目標(biāo)的運(yùn)動(dòng)信息，具有恒虛警(CFAR)性能。計(jì)算機(jī)仿真實(shí)驗(yàn)表明Hough變換檢測(cè)器具有比不依賴散射中心分布信息的廣義似然比(NSDD-GLRT)檢測(cè)器更好的檢測(cè)能力。
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關(guān)鍵詞:
- 雷達(dá)信號(hào)處理 /
- 距離擴(kuò)展目標(biāo) /
- 目標(biāo)檢測(cè) /
- 恒虛警 /
- Hough變換
Abstract: For the issue that the range spread targets got from the wideband radar signal are difficult to integrate for detect by the large velocity of target, a Hough Transformation Detector (HTD) is developed. Adjoin high resolution radar range profiles of range spread target processes high correlation coefficient. Using this characteristic, signal energy integrated by Hough transformation in cross-correlation order and correlation time two dimensional plane and target detect are carried. Theory analysis show HTD is non-dependent on target scatter distribution information and target moving information and processes Constant False Alarm Ratio (CFAR) performance. Computer simulation experiment show HTD achieves better detection performance than Non-Scatterer Density Dependent Generalized Likelihood Ratio Test (NSDD-GLRT) detector. -
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