Using the energy concentration ability of fractional Fourier transform (FRFT) to linear frequency modulation (LFM) signal, this paper presents a simplified data model for conformal array, and proposes a method to de-couple DOA and polarization estimation using an algorithm of noise subspace fitting. As it uses
a multi-dimensional and multi-peak search procedure to resolve the DOA estimation problem, the proposed scheme forms a single peak objection function by reforming the noise subspace vector and manifold matrix. 2D DOA estimation is performed with particle swarm optimization. The polarization parameter is then acquired based on the ESPRIT theory. Simulation results show that the proposed method can reduce the computation complexity with a favorable parameter estimation performance.
ZHANG Shu-yin, GUO Ying, QI Zi-sen, SU Ling-hua
. Joint Estimation of DOA and Polarization for LFM Signals Using Conformal Array Antenna[J]. Journal of Applied Sciences, 2013
, 31(3)
: 252
-258
.
DOI: 10.3969/j.issn.0255-8297.2013.03.006
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