A single dipole polarization sensitive array dimensionality reduction DOA estimation method in a multipath interference environment

Abstract

The invention provides a single dipole polarization sensitive array dimensionality reduction DOA estimation method in a multipath interference environment. The array employs single dipoles concurrent with the edge of a circumference to from a uniform circular array structure, can simultaneously perform azimuth angle and elevation angle two-dimensional estimation and can effectively fight multi-path interferences to realize mathematical modeling of narrowband signals received by a uniform circular array concurrent array; then according to a matrix rank loss principle, the four-dimensional spectral function of the polarization MUSIC (multiple signal classification) algorithm is subjected to dimensionality reduction processing to construct a spatial spectral function so as to realize the fast search of spatial two-dimensional angles. Compared with polarization sensitive array DOA and polarization parameter combined estimation methods, the dimensionality reduction DOA estimation method of the invention can realize rapid estimation of signal source angles under the condition of not increasing hardware demands, receive and utilize the polarization characteristics of signal sources and interference sources to effectively distinguish objects and interferences to realize object estimation in a complex environment and has a certain engineering application value.

Description

technical field [0001] The invention relates to a dimensionality reduction DOA estimation method of a single dipole polarization-sensitive array in a multipath interference environment, and belongs to the research field of high-resolution array direction-finding algorithms. Background technique [0002] Faced with the actual combat background in complex electromagnetic environments, fully tap and utilize the polarization information contained in radar antennas and electromagnetic waves, maximize the use of electromagnetic information obtained by radar systems, and improve the survival and countermeasure capabilities of passive radar systems in harsh electromagnetic environments , so that it can adapt to the complex and changeable battlefield environment. Dimension-reduced DOA estimation of polarization-sensitive arrays based on single dipole antennas is an important research direction of array signal processing, which can estimate DOA and polarization information of signal s...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing scalar array signal processing algorithm cannot effectively distinguish the target and the interference, and the joint estimation method based on the polarization-sensitive array DOA and the polarization parameter is time-consuming, the present invention proposes a single dipole under the condition of multi-path interference Dimensionality-reduced DOA estimation method for polarization-sensitive arrays

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