摘要
针对理想情况下,空间谱估计算法的测向性能随阵元数目增加而提高,然而实际工程中存在通道不一致和互耦等干扰,使阵元数目与测向精度不再成正比问题,提出一种研究最佳阵元数的方法。在阵列干扰条件下,利用非圆信号的伪协方差矩阵不为零特性,基于空间谱估计算法,以测角精度和测向成功概率为指标,分别在均匀线阵和均匀圆阵下研究最佳阵元数目。通过仿真分析得出,研究不同阵列形式下的不同目标个数的最佳阵元数目,对抗干扰至关重要。
The problem that the direction finding performance of spatial spectrum estimation algorithm increases with the increase of sensor numbers in ideal situation,however channel disaccord and mutual coupling interferences that exist in the actual project,leading to the sensor numbers is no longer proportional to the direction finding precision,a method to study the optimal sensor numbers is proposed.Under the condition of array interferences,using the characteristics of non-circular signals＇ pseudo-covariance matrix is not zero,according to the index of angle measuring accuracy and direction finding success probability,the optimal sensor numbers in uniform linear array and uniform circular array are studied based on spatial spectrum estimation algorithm,respectively. Through the simulation analysis,it is concluded that the study on optimal sensor numbers of different target numbers in different array forms is crucial for anti-interference.
出处
《航空兵器》
2015年第6期3-7,13,共6页
Aero Weaponry
基金
航空科学基金项目(201401P6001)
关键词
阵列干扰
非圆信号
最佳阵元数
波达方向估计
array interferences
non-circular signals
the optimal sensor numbers
direction of arrival（DOA）
