一种改进的SRP-PHAT宽带信源DOA估计算法  

Improved SRP-PHAT Algorithm for DOA Estimation of Wideband Sources

作　　者：左炜[1] 刘越[1] 

机构地区：[1]海军工程大学电子工程学院,武汉430033

出　　处：《空军预警学院学报》2013年第3期181-183,共3页Journal of Air Force Early Warning Academy

摘　　要：针对离散联合可控响应功率和相位变换(DSRP-PHAT)算法用于宽带信号DOA估计时精度不稳定问题,在线性阵列条件下提出了一种改进算法(IDSRP-PHAT).该算法首先计算各时延对应的角度,对其进行排序,然后通过滑窗法计算波束功率并反推得到波束角度,最后在峰值搜索中采用加权求和的方式估计DOA.仿真实验表明,相比DSRP-PHAT算法,IDSRP-PHAT算法提高了平均估计精度,同时也消除了不同DOA带来的精度差异.Taking into account that the precision of DSRP-PHAT algorithm for DOA estimation of wideband signal is unstable, this paper puts forward an improved DSRP-PHAT algorithm, based on the condition of linear arrays. In this scheme, the angles relating to each time delay are computed and ordered, then the wave-beam power is calculated by using the sliding window method and the beam angles are obtained through the inverse method, and finally, DOA is estimated by means of weighted summing in the search of peaks. Simulation results show that the improved DSRP-PHAT algorithm can both boost the average estimation accuracy and eliminate the accuracy variance out of various DOA, compared to the conventional DSRP-PHAT one.

关 键 词：SRP-PHAT算法 宽带信号 波达方向 线性阵列 

分 类 号：TN958[电子电信—信号与信息处理]