發(fā)布時(shí)間：2019-03-26 11:12

【摘要】：常規(guī)基于配準(zhǔn)補(bǔ)償方法因子孔徑損失和先驗(yàn)信息失配問(wèn)題,導(dǎo)致雜波距離依賴(lài)性和補(bǔ)償性能下降.為解決上述問(wèn)題,將稀疏恢復(fù)算法引入到雜波距離依賴(lài)性補(bǔ)償當(dāng)中,并對(duì)常規(guī)基于配準(zhǔn)補(bǔ)償方法中各距離單元回波數(shù)據(jù)預(yù)處理過(guò)程加以改進(jìn),提出了一種基于稀疏恢復(fù)的穩(wěn)健距離配準(zhǔn)補(bǔ)償方法——SRBC方法.該方法與常規(guī)基于配準(zhǔn)補(bǔ)償方法相比,無(wú)需子孔徑平滑,不依賴(lài)于先驗(yàn)知識(shí),直接利用稀疏恢復(fù)得到超分辨的雜波空時(shí)譜,計(jì)算得出過(guò)渡協(xié)方差矩陣,再通過(guò)Capon譜重構(gòu)出雜波協(xié)方差矩陣.經(jīng)仿真驗(yàn)證,SRBC方法不受先驗(yàn)信息失配影響,不僅能夠?qū)崿F(xiàn)雜波距離依賴(lài)性的自適應(yīng)補(bǔ)償,在存在陣元誤差時(shí)的雜波抑制性能同樣較為穩(wěn)定.
[Abstract]:The problem of aperture loss and prior information mismatch based on the conventional registration compensation method results in clutter distance dependence and compensation performance degradation. In order to solve the above problems, sparse restoration algorithm is introduced into clutter distance dependence compensation, and the preprocessing process of echo data of each distance unit in the conventional registration-based compensation method is improved. A robust distance registration compensation method-SRBC method based on sparse restoration is proposed. Compared with the conventional registration-based compensation method, this method does not need sub-aperture smoothing and does not depend on prior knowledge. The super-resolution space-time spectrum of clutter is obtained directly by sparse restoration, and the transition covariance matrix is obtained by calculating the matrix of transition covariance. Then the clutter covariance matrix is reconstructed by Capon spectrum. Simulation results show that the SRBC method is not affected by prior information mismatch. It can not only compensate clutter distance dependence adaptively, but also stabilize clutter suppression performance in the presence of element errors.
【作者單位】： 空軍工程大學(xué)防空反導(dǎo)學(xué)院;空軍95100部隊(duì);
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(6150010274)
【分類(lèi)號(hào)】：TN959.73
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本文編號(hào)：2447488