A New Direction-of-Arrival Estimation Method for Wideband LFM Sources Based on Temporal Delay-and-Product
Yiyu Zhou · Dianzi xuebao · 2009
In order to fasten and improve the bearing estimation method for wideband Linear Frequency Modulated(LFM)sources by exploiting the temporal information of this kind of signals,a new direction finding method based on the product of the array output with its temporally delayed version is proposed.The new method succeeded to estimate the direction-of-arrival(DOA)of the incident wideband LFM signals via narrowband subspace-based method,and exceeded normal wideband direction finding methods in computational efficiency and applicable inter-element spacing.Sufficient numerical examples are carried out to demonstrate the dominance of the novel method over normal wideband Coherent Signal-Subspace Method(CSM)in performance.