共形阵列LFM信号DOA和极化参数的联合估计

doi:10.3969/j.issn.0255-8297.2013.03.006

Abstract

Abstract: 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.

Key words: conformal array antenna (CAA), subspace fitting, particle swarm optimization (PSO), joint parameter estimation, linear frequency modulation (LFM)

CLC Number:

TN911.23

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.

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Joint Estimation of DOA and Polarization for LFM Signals Using Conformal Array Antenna

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