Novel DOA Estimation Algorithm for Weak Signals in the Presence of Strong Jamming via UCA
Luo Jing-qing · Modern Defence Technology · 2010
To solve the problem that weak signals' DOA cant be estimated correctly in the presence of strong jamming via the classical spatial spectrum DOA estimation algorithm such as MUSIC,a novel algorithm using extended-noise-subspace based on uniform circular array (UCA) is proposed.Firstly,the steering vectors of strong jamming is added into the noise subspace to form the extended-noise-subspace, and then a beam function and a new steering vector are constructed to search for the peaks of spatial spectrum. This algorithm may eliminate the effect of strong jamming and estimate weak signals' DOA correctly. Lastly,its effectiveness and correctness have been verified by computer simulations.