Array position error correction method taking information source azimuth error into account

Abstract

The invention belongs to the field of array signal processing, and particularly relates to an array position error correction method for the situation that information source azimuth information is biased, and the array position error is accurately corrected. According to the array position error correction method, single information sources are corrected, a receiving array can rotate precisely, the effect that the multiple information sources are corrected independently in a time division mode, and therefore a large number of samples are obtained; the phase position of an information source steering vector is estimated through a least square fitting method, array element data with large phase fitting errors are eliminated through an outlier elimination method, the phase position is estimated through the least square fitting method, and the azimuth information of the information sources is obtained; the errors of the array element data are corrected through a least square method. By means of the method for correcting the errors of the array element position, the errors of the array element position can be accurately corrected, and the method is simple and suitable for being applied to practical engineering.

Description

technical field [0001] The invention relates to the field of array signal processing, in particular to an array position error correction method considering the source azimuth error. Background technique [0002] Signal Direction of Arrival (DOA) estimation is widely used in radar, communication, sonar and many other fields. Spectrum estimation algorithms represented by multiple signal classification (MUSIC) algorithm have high resolution and estimation accuracy, the premise of which is that the array flow pattern is known accurately. Affected by various non-ideal factors (machining error, inconsistency of receiving channel, array element mutual coupling, etc.), the array flow pattern often has a certain degree of deviation and disturbance, which will seriously affect the performance of the high-resolution spectrum estimation algorithm. deteriorate, or even fail. Limited to the current technological level, it is very difficult to overcome the model error purely from the as...

AI Technical Summary

Problems solved by technology

[0005] The position error of the array element makes the array steering vector appear azimuth-dependent, so the method based on active correction often requires multiple independent correction sources; the accuracy of the position of the auxiliary source will also affect the result of position error correction; in addition, when a certain When there is a large error in the position of some array elements, there will be a large deviation in the estimation of the source angle of arrival. The existence of these problems makes it difficult for the existing error correction method of the array element to meet the actual needs of the project.

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