Single-snapshot data-based coherent signal DOA (direction of arrival) estimating method

A coherent signal and DOA technology, applied in the field of array antenna system, can solve the problems of increasing calculation amount, impact of DOA estimation performance, pseudo-covariance matrix has not been fully applied, etc., and achieve the effect of improving accuracy

Inactive Publication Date: 2015-06-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Algorithms based on data cross-correlation preprocessing can obtain better DOA estimation performance, but additional calculations are added in data preprocessing, and DOA estimation performance is affected by the data received at refer...

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  • Single-snapshot data-based coherent signal DOA (direction of arrival) estimating method

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[0023] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0025] The invention di...

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Abstract

The invention discloses a single-snapshot data-based coherent signal DOA estimating method and relates to the technical field of array antenna systems or methods capable of indicating different signal directions. The method comprises rearranging the single-snapshot received data of an array to obtain two pseudo-covariance matrixes, and then through two pseudo-covariance matrixes, expanding the covariance matrix of a subspace restructuring algorithm; performing singular value decomposition on the new pseudo-covariance matrixes to obtain a signal subspace and a noise subspace, and performing DOA estimation on incoming coherent wave signals through a MUSIC spectrum estimating method. The single-snapshot data-based coherent signal DOA estimating method can eliminate coherence among source signals under single-snapshot conditions and meanwhile further improve the DOA estimating precision. The single-snapshot data-based coherent signal DOA estimating method is mainly applied to rapid estimation of incoming directions of coherent signals under the single-snapshot conditions.

Description

technical field [0001] The present invention relates to the technical field of an array antenna system or method capable of simultaneously indicating different signal directions, in particular to a method for estimating DOA of a coherent signal based on single snapshot data. Background technique [0002] Super-resolution direction of arrival (DOA) technology represented by classic algorithms such as multiple signal classification algorithm (MUSIC, multiple signal classification) and signal parameter estimation algorithm based on rotation invariant technology (ESPRIT, estimation of signal parameter via rotational inviance techniques) It is an important research point of modern spatial spectrum estimation. Its accuracy and real-time performance in estimating the signal space angle of arrival and its wide application prospects have aroused great concern of people. In the classic DOA estimation algorithm, the implementation of the MUSIC algorithm and the ESPRIT algorithm both d...

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Application Information

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IPC IPC(8): G01S3/74
CPCG01S3/06G01S3/74
Inventor 邓超升朱立东陈天宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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