Passive passage correcting method of small-size array

Abstract

The invention relates to a passive passage correcting method of a small-size array. According to the method, under certain signal-to-noise requirements, the stable and reliable single information source echo is determined according to the size of a characteristic value after the strong echo characteristic decomposition; the single information source echo snapshot data is used for estimating the passage amplitude gain factor; the single information source ocean echo snapshot data subjected to the amplitude calibration and the existing array information are utilized for estimating the passage phase error factor, and the phase correction is realized. The passive passage correcting method has the advantages that the influence such as multipath effect and boat echo interference in the echo can be avoided, and the requirement on the quality of the ocean echo data is lower, so the better applicability to the radar work environment change can be realized, and the long-time continuous work can be realized; the high-intensity strong single information source characteristic ocean echo is utilized, and the correction results have good precision and robustness; the calculation quantity is small, the real-time performance is high, and the long-time stable work can be realized; the application flexibility of a radar is greatly improved; the detection performance is improved, and meanwhile, the development cost and the maintenance cost of the radar are greatly reduced.

Description

technical field [0001] The invention relates to a passive channel correction method for a small array, which is a method for performing passive channel correction on a plane array by using single-source ocean echo data received by a high-frequency ground wave radar. Background technique [0002] HF Ground Wave Radar (HF Ground Wave Radar) uses the characteristics of vertically polarized high-frequency electromagnetic waves to diffract and propagate on the conductive ocean surface with small attenuation and the first-order and second-order scattering mechanisms of the ocean surface for radio waves to achieve beyond-horizon detection of wind fields , wave field, current field and other ocean dynamic parameters and ships, aircraft and other maritime moving targets. [0003] Due to factors such as the receiving antenna in the radar receiving system, the gain inconsistency of the analog front end, and the influence of the surrounding electromagnetic environment, there are differe...

AI Technical Summary

Problems solved by technology

However, this method needs to set the array in a form that satisfies translation invariance, and there are restrictions on the formation design

When the echo quality is slightly low, the algorithm tends to converge to a local optimum, and the accuracy is not high, which makes the result less real-time in correction

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