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Wave beam-doppler unitary ESPRIT multi-target angle estimation method

A technology of Doppler unitary and angle estimation, which is applied in the field of radar and can solve problems such as large amount of calculation

Inactive Publication Date: 2018-03-09
NORTHWEST UNIV(CN)
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Problems solved by technology

Although this technology can be extended to space-time two-dimensional parameter estimation, and has better parameter estimation performance when the number of snapshots is low, it needs to solve a high-dimensional optimization problem, and the amount of calculation is relatively large.

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  • Wave beam-doppler unitary ESPRIT multi-target angle estimation method
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  • Wave beam-doppler unitary ESPRIT multi-target angle estimation method

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Embodiment Construction

[0080] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

[0081] refer to figure 1 , shows a flowchart 100 of an embodiment of a beam-Doppler unitary ESPRIT multi-target angle estimation method according to the present application. Described beam-Doppler unitary ESPRIT multi-target angle estimation method comprises the following steps:

[0082] Step 101, time-domain smoothing is performed on the distance unit data where the target is located, and L time-domain snapshot data after smoothing are obtained, wherein the lth time-domain snapshot data can be expressed as x l , l=1,......

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Abstract

The invention relates to a wave beam-doppler unitary ESPRIT multi-target angle estimation method, and mainly solves the multi-target direction of arrival (DOA) estimation problem. One specific embodiment of the method comprises the following steps: smoothing the time domain of the distance unit data to which the target is located, thus obtaining L smoothed time domain snapshot data pieces; using acenter conjugate symmetry Fourier transform matrix to transform the time domain snapshot data into the wave beam-doppler domain, and keeping a rotation unchanged structure in the same time; finally using an actual value unitary ESPRIT algorithm to estimate the target DOA. The method fully uses the signal time domain information to improve spatial domain parameter estimation performance, is high in precision, and low in computing complexity.

Description

technical field [0001] The invention belongs to the technical field of radar, and relates to a beam-Doppler domain two-dimensional unitary ESPRIT algorithm based on time domain smoothing technology. Background technique [0002] The resolution of multiple targets in the main beam is a key problem to be solved when ground-based and / or airborne early warning radars track multiple targets in the main beam. It is easy for multiple targets to fall into the same range unit or adjacent range units when flying in formation, and it is difficult to separate these targets from the distance only by pulse compression technology. At the same time, because the coherent accumulation time of early warning radar is usually short, it is also difficult to separate the approaching target from the Doppler dimension only. The present invention considers resolving multiple objects within the main lobe from the spatial dimension through high-precision angle measurements. [0003] Classical angle m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02G01S3/00
CPCG01S3/00G01S7/02
Inventor 文才闫青彭进业
Owner NORTHWEST UNIV(CN)
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