一種簡單的相干雷達(dá)極化恒虛警檢測算法
A Simple Polarimetric CFAR Detector for Coherent Radar
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摘要: 該文提出了高斯雜波背景下一種結(jié)構(gòu)簡單的相干雷達(dá)極化恒虛警檢測算法。利用雷達(dá)回波的極化信息來提高檢測性能,推導(dǎo)出了虛警概率表達(dá)式。研究結(jié)果表明,該相干雷達(dá)極化恒虛警檢測算法相對于雜波協(xié)方差矩陣有恒虛警的性質(zhì)。該檢測算法比極化廣義似然比檢測算法計(jì)算量小,易于工程實(shí)現(xiàn),適合于強(qiáng)信雜比和目標(biāo)信號導(dǎo)向矢量未知的情況。同時仿真分析了不同極化狀態(tài)時的檢測性能。
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關(guān)鍵詞:
- 相干雷達(dá); 極化; 恒虛警
Abstract: A simple polarimetric CFAR detector for coherent radar against a Gaussian background is presented. The expression of PFA for the detector is derived. It is shown that the proposed detector has the constant false alarm properties with respect to the covariance matrix of the clutter. With respect to the polarimetric generalized likelihood ratio test detector, the proposed one has less complexity. It is appropriate to high SCR and unknown steering, vector case. The performance in different polarimetric cases is analyzed. -
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