一種改進的基于低秩逼近的空時自適應處理算法
發(fā)布時間:2019-01-27 23:14
【摘要】:針對非均勻雜波情況下的空時自適應處理的小樣本問題,該文提出一種基于權矩陣低秩逼近的空時自適應處理方法。與傳統(tǒng)的低秩逼近算法不同,利用空時導向矢量特殊的克羅累計性,該文重新構造新的權矩陣,使得該權矩陣的行數(shù)與列數(shù)盡可能地相近或相同,以減少算法所需的樣本個數(shù)和計算量。采用低秩逼近方法對新構造的權矩陣進行表示,則原二次優(yōu)化問題轉(zhuǎn)化為求解一個雙二次代價函數(shù)問題。實驗表明,改進的空時權矩陣低秩逼近方法能有效地提高空時自適應處理的收斂速度和降低算法復雜度。
[Abstract]:For the small sample problem of space-time adaptive processing in the case of non-uniform clutter, this paper presents an adaptive space-time processing method based on low-rank approximation of weight matrix. Different from the traditional low rank approximation algorithm, this paper reconstructs a new weight matrix by using the special Kroth cumulativeness of space-time guidance vector, so that the number of rows of the weight matrix is as close or the same as the number of columns as far as possible. To reduce the number of samples needed and the amount of computation needed by the algorithm. If the new weight matrix is represented by the low rank approximation method, the original quadratic optimization problem is transformed into a biquadratic cost function problem. Experiments show that the improved space-time weight matrix low rank approximation method can effectively improve the convergence speed and reduce the complexity of space-time adaptive processing.
【作者單位】: 西安電子科技大學雷達信號處理國家重點實驗室;西北大學信息科學與技術學院;
【基金】:國家自然科學基金(61271293) 陜西省自然科學基金(2013JM8008)資助課題
【分類號】:TN959.73
[Abstract]:For the small sample problem of space-time adaptive processing in the case of non-uniform clutter, this paper presents an adaptive space-time processing method based on low-rank approximation of weight matrix. Different from the traditional low rank approximation algorithm, this paper reconstructs a new weight matrix by using the special Kroth cumulativeness of space-time guidance vector, so that the number of rows of the weight matrix is as close or the same as the number of columns as far as possible. To reduce the number of samples needed and the amount of computation needed by the algorithm. If the new weight matrix is represented by the low rank approximation method, the original quadratic optimization problem is transformed into a biquadratic cost function problem. Experiments show that the improved space-time weight matrix low rank approximation method can effectively improve the convergence speed and reduce the complexity of space-time adaptive processing.
【作者單位】: 西安電子科技大學雷達信號處理國家重點實驗室;西北大學信息科學與技術學院;
【基金】:國家自然科學基金(61271293) 陜西省自然科學基金(2013JM8008)資助課題
【分類號】:TN959.73
【參考文獻】
相關期刊論文 前2條
1 黨博;廖桂生;李軍;柴睿;粟嘉;;基于投影權優(yōu)化的雙基地MIMO雷達雜波抑制方法[J];電子與信息學報;2013年10期
2 李曉明;馮大政;;一種機載雷達兩級降維空時二維自適應處理方法[J];航空學報;2008年01期
【共引文獻】
相關期刊論文 前5條
1 彭衛(wèi);汪學剛;趙建宏;吳宏剛;;基于常規(guī)多普勒濾波器組結(jié)構的合成寬帶距離像性能分析[J];航空學報;2009年06期
2 姚彥鑫;楊東凱;張其善;;GPS多徑信號的自適應濾波估計方法[J];航空學報;2010年10期
3 呂暉;馮大政;和潔;向聰;;一種簡化的機載MIMO雷達雜波特征相消器[J];航空學報;2011年05期
4 李軍;黨博;劉長贊;廖桂生;;利用發(fā)射角度的雙基地MIMO雷達雜波抑制方法[J];雷達學報;2014年02期
5 王s,
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