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DOA estimation method of LTE external radiation source radar based on matrix recombination

A technology of external radiation source radar and DOA, which is applied to direction finders using radio waves, radio wave direction/deviation determination systems, etc., can solve problems such as failure of the MUSIC angle of arrival estimation algorithm

Inactive Publication Date: 2019-12-03
SHENZHEN RES INST OF WUHAN UNIVERISTY
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Problems solved by technology

[0009] Aiming at the failure of the MUSIC angle of arrival estimation algorithm caused by the coherent signal source brought by the complex multipath of the external radiation source radar, the present invention proposes a decoherence method for the coherent signal source of the external radiation source radar

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  • DOA estimation method of LTE external radiation source radar based on matrix recombination
  • DOA estimation method of LTE external radiation source radar based on matrix recombination
  • DOA estimation method of LTE external radiation source radar based on matrix recombination

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Embodiment Construction

[0079] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0080] Please refer to the flowchart of the implementation method of the present invention figure 1 , the signal in the embodiment of the present invention is an LTE signal in FDD mode, the bandwidth is 15 MHz, and the sampling rate of the receiving end is 23.04 MHz. The present invention provides a kind of LTE external radiation source radar DOA estimation method based on matrix recombination, and concrete implementation comprises the following steps:

[0081] Step 1: Model the received signal of the LTE external radiation source radar, obtain the signal ex...

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Abstract

The invention discloses a DOA estimation method of an LTE external radiation source radar based on matrix recombination. The problem of coherent signal sources is considered, and a matrix recombination method is adopted to perform processing to remove the coherence between signal sources. The technical scheme adopted by the invention is to achieve decoherence of the signals by restoring the Toeplit property of a signal covariance matrix, and then accurately estimate the azimuth information of a coherent signal in a spatial domain. The Toeplit property of a cross-correlation signal covariance matrix is used. Compared with the existing method, the DOA estimation method disclosed by the invention has the advantages of high calculation speed and good instantaneity, furthermore, the estimationaccuracy is high, the detection performance of a radar system can be improved, and it is very meaningful for the practical application of the LTE external radiation source radar.

Description

technical field [0001] The invention belongs to the technical field of external radiation source radar, in particular to a method for estimating DOA of LTE external radiation source radar based on matrix recombination. Background technique [0002] The so-called external radiation source radar is also called passive radar, opportunistic radar, etc. Compared with the active radar system of the traditional system, the receiving system of the external radiation source radar is completely passive, does not radiate any electromagnetic waves, but receives and processes target reflection The time delay information, Doppler frequency, direction of arrival and other parameters of the target are extracted from the radio waves propagated in space by the non-cooperative illumination source, so as to realize the detection, positioning and tracking of the target. The third-party radiation source signals used are non-cooperative signals, and there are many types of radiation sources that c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 饶云华王雅莉王胜涛胡海霞聂文洋潘登周健康
Owner SHENZHEN RES INST OF WUHAN UNIVERISTY