上海航天
上海航天
상해항천
AEROSPACE SHANGHAI
2012年
3期
6-10,53
,共6页
低空测向%波达方向估计%特征值分解%时域数据块平滑
低空測嚮%波達方嚮估計%特徵值分解%時域數據塊平滑
저공측향%파체방향고계%특정치분해%시역수거괴평활
Low-angle bearing%Direction-of-arrive estimation%Eigen-value decomposition%Temporal data block smoothing
针对低空测向,提出了一种基于多径衰落特性的快速波达方向估计算法。先给出了一种新的基于时域数据块平滑（TDBS）解相干方法,无阵列孔径损失,对阵列结构无要求,再分步分辨相干和非相干信源,用少数阵元进行迭代解相干处理,降低了算法的运算量,可分辨更多信源。算法无需特征值分解,有较强的实时性。仿真结果表明算法理论正确且有效。
針對低空測嚮,提齣瞭一種基于多徑衰落特性的快速波達方嚮估計算法。先給齣瞭一種新的基于時域數據塊平滑（TDBS）解相榦方法,無陣列孔徑損失,對陣列結構無要求,再分步分辨相榦和非相榦信源,用少數陣元進行迭代解相榦處理,降低瞭算法的運算量,可分辨更多信源。算法無需特徵值分解,有較彊的實時性。倣真結果錶明算法理論正確且有效。
침대저공측향,제출료일충기우다경쇠락특성적쾌속파체방향고계산법。선급출료일충신적기우시역수거괴평활（TDBS）해상간방법,무진렬공경손실,대진렬결구무요구,재분보분변상간화비상간신원,용소수진원진행질대해상간처리,강저료산법적운산량,가분변경다신원。산법무수특정치분해,유교강적실시성。방진결과표명산법이론정학차유효。
A fast DOA estimation algorithm based on multi-path fading characteristic was put forward for the need of low-angle bearing in this paper.A new de-correlation method based temporal data block smoothing was proposed firstly,which was no array aperture losing and had no requirements to the aperture structure.Then the correlated sources and incoherent sources were resolved separately,and the temporal data block smoothing was performed iteratively utilizing smaller sensor arrays,which could reduce the computational complexity and estimate more sources.The algorithm needn＇t eigen-value decomposition and high ability of realization.The simulation results showed that the algorithm was correct and effective.
