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Hybrid field signal source positioning method based on symmetrical nested array

A source location and mixed field technology, applied in positioning, measuring devices, instruments, etc., can solve problems such as low estimation accuracy and complex positioning algorithms, to overcome Gaussian noise interference, halve degrees of freedom, and reduce computational complexity degree of effect

Inactive Publication Date: 2018-11-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, the general estimation accuracy is not high or the positioning algorithm is complex

Method used

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  • Hybrid field signal source positioning method based on symmetrical nested array
  • Hybrid field signal source positioning method based on symmetrical nested array
  • Hybrid field signal source positioning method based on symmetrical nested array

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Embodiment Construction

[0039] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the compo...

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Abstract

The invention provides a hybrid field signal source positioning method based on a symmetrical nested array. The hybrid field signal source positioning method comprises the following steps that an antenna array is set, wherein the antenna array is the symmetrical nested array; a far-field signal DOA is estimated to obtain an estimation value of the far-field signal DOA; the near field component isseparated from the far field component; a fourth-order cumulant virtual difference array of a near-field signal is calculated; an estimation value of the near-field signal DOA is obtained by using spectral peak search; and according to the near-field signal DOA estimation value, the near-field signal distance is estimated to obtain a near-field signal distance estimation value. The hybrid field signal source positioning method uses mixed-order statistics, and compared with a second-order statistic algorithm, the hybrid field signal source positioning method solves the problems of Gaussian noise interference and reduction of degree of freedom by half; the symmetric nested array and the fourth-order cumulant virtual differential array are used for improving the estimation accuracy of far-field DOA, near-field DOA and a near-field distance; oblique projection technology is utilized to separate the far-field and near-field components, and thus, it is not necessary to distinguish the far-field signal from the near-field signal according to distance parameters; and therefore, the number of search is reduced, and the computational complexity of the algorithm is further reduced.

Description

technical field [0001] The invention belongs to the field of mixed field positioning in the field of array signal processing, and in particular uses a nested array symmetrical about the origin to realize a high-precision mixed field signal source positioning method. Background technique [0002] Passive source location refers to the technology of using array signal processing method to estimate the positioning parameters such as DOA or distance of the target source, so as to determine the spatial position of the source. In recent years, passive source location is one of the research hotspots in the field of array signal processing. It plays a very important role in many civil and military fields such as radar, sonar, communication and earthquake detection. [0003] With the rapid development of information technology, the application environment of communication technology is becoming more and more complex. For example, in the fields of radar, sonar, sound source localizat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02
CPCG01S5/02
Inventor 符茗铖郑植孙洁
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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