利用修正的Cyclic-SSF对宽带信号波达方向的估计

Estimating DOA of Wide-Band Signals via Modified Cyclic-SSF Method

提出一种修正的Cyclic SSF方法用于波达方向估计 .该方法不仅具有原Cyclic SSF方法的良好的噪声抑制能力 ,且适用于窄带和宽带信号 .修正的Cyclic SSF方法避免了SC SSF方法所涉及的一系列移位相乘运算 ,使运算速度大大提高 .修正的Cyclic SSF方法可用于多个具有不同循环频率、来自不同方向的宽带信号的DOA估计 .蒙特卡洛试验证实该方法的噪声抑制性能和SC SFF相当 .

A modified Cyclic-SSF (signal subspace fitting) method is proposed for estimating the DOA (direction-of-arrival) of wide-band and narrow-band signals. It has the capability to suppress noise for received signals and save computational time in comparation with the SC*.SSF (spectral correlation-SSF) method that entails a large amount of shift-and-multiplication. Moreover, the proposed method remains the advantage of Cyclic-SSF whenmaking estimation DOA for signals with different cyclic frequencies. Monte-Carlo trials show that the noise suppression is equivalent to that of SC*.SSF.