一种快速的空时级联频率-到达角估计  

A Fast Algorithm of Spatial-Temporal Cascaded Frequency-DOA Estimation

作　　者：管亮中[1] 杨玉林[1] 

机构地区：[1]空军第一航空学院航空电子工程系,信阳464000

出　　处：《电子信息对抗技术》2016年第1期1-3,69,共4页Electronic Information Warfare Technology

摘　　要：为减少算法运算量,将多级维纳滤波器引入到空时级联频率—到达角估计中,提出一种快速级联估计算法。快速算法通过简单的乘累加运算得到噪声子空间,避免了对阵列协方差矩阵的特征分解,减少了算法运算量。仿真结果表明:在信噪比大于5d B时,原有算法和快速算法性能相当,频率估计标准差均降到1MHz以下,DOA估计标准差小于1°。The Multi-Stage Wiener Filter （MSWF） is introduced to spatial-temporal cascade frequency-DOA estimation to reduce the computation cost. The fast algorithm can acquire the noise subspace by simple multiply-add operation, and has no need of the eigen values decompo- sition of the auto-correlation of the sample data. So the fast algorithm gets less computation cost. Simulation results demonstrate the ability of the fast algorithm and the basic algorithm are equivalent. The STD of frequency is lower than 1MHz and STD of DOA is less than 1 °, when the SNR exceeds 5 dB.

关 键 词：空时级联 多级维纳滤波器 快速算法 

分 类 号：TN971.1[电子电信—信号与信息处理]