【摘要】：為了提高三元陣被動(dòng)聲納在水下強(qiáng)干擾下對(duì)弱目標(biāo)的檢測(cè)性能,文章提出了一種基于三元陣的水下強(qiáng)干擾子空間剔除的抑制算法。算法對(duì)強(qiáng)干擾和弱目標(biāo)分別采用了兩種不同的快照數(shù)進(jìn)行處理,用較短的時(shí)間估計(jì)運(yùn)動(dòng)強(qiáng)干擾的干擾空間,采用正交投影的辦法從原始信號(hào)中去除強(qiáng)干擾;對(duì)得到的信號(hào)作時(shí)間累積,通過(guò)自適應(yīng)波束形成算法或常規(guī)波束形成算法實(shí)現(xiàn)對(duì)弱目標(biāo)地檢測(cè)。根據(jù)海試數(shù)據(jù)的處理結(jié)果表明,文中建立的算法可以有效地將運(yùn)動(dòng)強(qiáng)干擾從接收到的原始信號(hào)中剔除,實(shí)現(xiàn)了干擾抑制作用,提高了運(yùn)動(dòng)強(qiáng)干擾下三元陣聲納對(duì)弱目標(biāo)的檢測(cè)性能。
[Abstract]:In order to improve the performance of passive sonar detection for weak targets under strong underwater interference, a subspace rejection algorithm based on ternary array is proposed in this paper. The algorithm uses two different snapshot numbers to deal with strong interference and weak target respectively. The interference space of motion strong interference is estimated in a short time and the strong interference is removed from the original signal by orthogonal projection. Based on the time accumulation of the obtained signal, the weak target is detected by adaptive beamforming algorithm or conventional beamforming algorithm. According to the processing results of sea trial data, the proposed algorithm can effectively eliminate the strong motion interference from the received original signal and realize the interference suppression effect. The detection performance of three-way array sonar for weak targets under strong motion interference is improved.
【作者單位】： 哈爾濱工程大學(xué)水聲技術(shù)重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院聲學(xué)研究所水聲工程中心;
【基金】：自然科學(xué)基金(No.61501133)
【分類(lèi)號(hào)】：TB566

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