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Array mutual coupling calibration and source direction estimation method suitable for uniform circular array

A uniform circular array and array signal technology, applied in the field of communication and radar, can solve the problem of large amount of computation

Inactive Publication Date: 2008-03-26
中国人民解放军空军工程大学导弹学院 +1
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Problems solved by technology

Compared with the method of directly measuring the mutual coupling of the array, the accuracy of the correction of the parameter class estimation method is much higher, but the calculation amount is quite large

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  • Array mutual coupling calibration and source direction estimation method suitable for uniform circular array
  • Array mutual coupling calibration and source direction estimation method suitable for uniform circular array
  • Array mutual coupling calibration and source direction estimation method suitable for uniform circular array

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Embodiment Construction

[0059] The present invention utilizes the array signal processing technology to simultaneously estimate the array mutual coupling error and the incident angle of the signal source, its principle:

[0060] (1) Using the zonal cyclic property and symmetric Toeplitz property of the uniform circular array mutual coupling matrix, the mutual coupling error matrix of the uniform circular array is expressed as an N×N triple zonal cyclic matrix.

[0061]Let C represent the mutual coupling error matrix of the uniform circular array. According to the characteristics of the uniform circular array, a three-band circulant matrix can be used to model it, and it can be expressed as an N×N three-band circulatory matrix. If only the mutual coupling effect between the left and right adjacent three array elements is considered, that is, the mutual coupling degree of freedom q=3, the circulatory vector of the circulatory matrix C can be expressed as:

[0062] c ...

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Abstract

This invention relates to an array cross coupling proofreading and information source direction measuring method for homogeneous round array. This method uses array information disposing technique to estimate round array cross coupling error and information source AOA at the same time. Approaches are as follows: First collects data from each channel and saves it to the system memory. Then the data needs to be adaptive equalizing disposed. Next range the disposed data to a covariance matrix and disassemble it according to their character. After this can get noise subspace consisted of small characterized vector. By using subspace construction expense function, the azimuth angle and cross coupling errors can be figured out. Finally through the complexor from cross coupling error to homogeneous round array, finish the proofreading. This invention can universally apply to cross coupling proofreading and information source direction measuring in radar and communicating field. It is worth to wildly apply.

Description

technical field [0001] The invention belongs to the technical field of radar and communication, and relates to a spatial spectrum estimation signal processing method in this field. Specifically, the invention relates to an array mutual coupling correction and signal source suitable for a uniform circular array antenna multi-channel radar signal processing system. direction finding method. Background technique [0002] Spatial spectrum estimation is widely used in radar, sonar, communication, seismic exploration and other fields, and it is a key technology to improve the performance of parameter estimation. However, when there are errors in the spatial array, the performance of spatial spectrum estimation will be severely degraded, or even unusable, so array error is an important factor affecting the performance of spatial spectrum estimation. Compared with other array errors, the mutual coupling effect between array elements is closely related to the electromagnetic charact...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/46
Inventor 齐崇英张永顺陈志杰韩颖
Owner 中国人民解放军空军工程大学导弹学院
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