New parameter estimation algorithm for near-field sources
Zhang Jun-ying · Journal of Xidian University · 2007
This paper proposes a new subspace-based algorithm to jointly estimate the frequencies,directions of arrival(DOAs),and ranges of multiple near-field narrow-band sources.Firstly,the proposed method constructs four cumulant matrices by virtue of the fourth-order cumulants of some properly chosen sensor outputs;secondly,by using the above-mentioned four matrices,it forms three new ones,from whose eigenvalues the source parameters can be easily obtained.In comparison with some available cumulant-based methods,the proposed algorithm can make efficient use of the array aperture,and thus has a higher estimation accuracy.Simulation results also show that the proposed method is of such performance.