Bearing and Range Estimation for Multiple Near-Field Sources based on Ambiguity Function

Abstract

AD-MUSIC is introduced to near-field to investigate the bearing and range estimation for the mixed source localization of sinusoidal signal and LFM signal. Firstly, a near-field two-dimensional MUSIC method based on ambiguity function distribution is put forward. Further, a novel Root-MUSIC method which constructs two ambiguity function distribution matrices is proposed for near-field source localization. The simulation results show that the two ambiguity function based methods have higher accuracy and resolution for the position estimation of the mixed-source signals compared with WVD based methods and conventional algorithms, even when the signal-to-noise ratio is low.