摘要
提出了一种运动单阵元被动合成阵列波达方向(DOA)估计算法。该算法基于被动合成阵列(PSA)的概念,结合空间谱估计的思想构建了运动单阵元被动合成阵列模型,通过多次不同速度合成阵列过程实现对信号DOA的无模糊估计。通过对单次匀速合成阵列过程进行分析得到,在假设信号频率已知条件下,合成阵列算法能够达到与同孔径实阵列多重信号分类(MUSIC)算法相当的DOA估计性能。仿真验证了被动合成阵列与同孔径实阵列的渐近等效性及算法的有效性。
A direction of arrival （DOA） estimation algorithm for the passive synthetic arrays （PSA） of a moving single sensor is proposed.Based on the concept of PSA in combination with the idea of spatial spectrum estimation,this algorithm constructs a PSA model,and then in accordance with this data model uses an improved multiple signal classification （MUSIC） algorithm to estimate the DOA of signals impinging on the single sensor.Theoretical analysis shows that,on the assumption that the signal frequencies are known,the algorithm can achieve the same performance in synthesizing one uniform linear array at uniform velocity as the actual physical aperture array using MUSIC algorithm does.Simulation results verify that the passive synthetic array is equivalent to the real aperture array and verify the effect of this algorithm.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2010年第7期1445-1453,共9页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(60702010)
