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Estimation method and system for 2D direction of arrival (DOA) of coherent source

A two-dimensional wave and coherent signal technology, applied in the direction or offset determination system, radio wave direction/deviation determination system, direction finder using electromagnetic waves, etc., can solve false alarm target positioning, errors, and coherent signals source and other issues to achieve the effect of simplicity, accuracy improvement and complexity reduction

Inactive Publication Date: 2019-05-03
GUIZHOU AEROSPACE INST OF MEASURING & TESTING TECH
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  • Application Information

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Problems solved by technology

However, due to the complexity of the communication system, there will be coherent sources, which will cause problems such as false alarms or wrong target positioning
For example, MUSIC cannot make a good estimate of the coherent signal due to the interpenetration of the signal subspace and the noise subspace caused by coherence.

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  • Estimation method and system for 2D direction of arrival (DOA) of coherent source
  • Estimation method and system for 2D direction of arrival (DOA) of coherent source
  • Estimation method and system for 2D direction of arrival (DOA) of coherent source

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Embodiment Construction

[0020] The present invention will be further described in detail through specific embodiments below, but these embodiments are only for illustration and do not limit the scope of the present invention.

[0021] Please refer to figure 1 , a method for estimating the two-dimensional direction of arrival of a coherent signal source in the present invention is characterized in that it includes: step S101, deploying a receiving array to receive the signal value of the coherent signal source; step S102, constructing a covariance matrix through the received signal value ; Step S103, perform eigenvalue decomposition on the covariance matrix, and extract eigenvectors containing all signal information; Step S104, use the extracted eigenvectors to reconstruct the Toeplitz matrix.

[0022] In one embodiment, the deploying the receiving array to receive the coherent signal source signal value includes: adjusting the positions of the deployed receiving array elements so that the M array ele...

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Abstract

The invention relates to an estimation method and system for the 2D DOA of a coherent source. The method comprises that a reception array is disposed to receive a signal value of the coherent source,a covariance matrix is constructed via the received signal value, a characteristic value of the covariance matrix is decomposed, a characteristic vector including all signal information is extracted,and a Toeplitz matrix is reconstructed via the extracted characteristic vector. The method and system have the advantages that realization is easy, the computing complexity is reduced, and estimationin a low signal to noise ratio is more accurate.

Description

technical field [0001] The invention relates to a method and system for estimating the two-dimensional direction of arrival of coherent information sources. Background technique [0002] Spatial estimation technology is a new airspace signal processing technology developed in the past 30 years. It can also be said that it is a new technology developed on the basis of beamforming technology, null point technology and time domain spectrum estimation technology. Its main The goal is to study various algorithms to improve the estimation accuracy, angle resolution and operation speed of spatial signals (including independent, partial correlation and relative angles) within the processing bandwidth. The earliest method for estimating the angle of arrival of space signals is to use the method of mechanical beam scanning. This method cannot meet the actual needs in terms of speed and accuracy. The research on beamforming technology has made breakthroughs in these aspects. [0003] ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14G01S3/78G01S3/802
Inventor 舒荣
Owner GUIZHOU AEROSPACE INST OF MEASURING & TESTING TECH