Adaptive two-dimensional clustering-based signal pre-sorting method

Abstract

The invention discloses an adaptive two-dimensional clustering-based signal pre-sorting method. The method can be used for the signal pre-recognition of a new system radar in a complex environment. The method includes the following steps that: an antenna array is adopted to perform two-dimensional positioning on a target, so that distance and azimuth information can be obtained; the initial valuesof the thresholds of the distance and azimuth are set; similarity between the distance dimension and azimuth dimension of the target is calculated; two-dimensional clustering of the distance and azimuth is obtained according to the calculated similarity and thresholds; and the thresholds of the distance and the azimuth are adaptively adjusted, the average value of the similarity between the distance dimension and azimuth dimension after clustering is put into statistics until the average value is smaller than the threshold of the distance or the azimuth, and signal pre-sorting is completed. According to the adaptive two-dimensional clustering-based signal pre-sorting method of the invention, pre-positioning and pre-sorting are sequentially carried out, so that the limitations of traditional radar signal sorting are broken; and the two-dimensional clustering processing of the distance and azimuth is utilized, so that increasingly serious batch increase and batch missing phenomena of signal sorting can be eliminated, and therefore, the effectiveness of radar signal sorting can be improved.

Description

technical field [0001] The invention relates to the technical field of radar signal processing in electronic countermeasures, in particular to a signal pre-sorting method based on adaptive two-dimensional clustering. Background technique [0002] Electronic countermeasures are an important means of attack and defense in modern warfare, and radar signal sorting is the sorting of radar radiation signals with unknown parameters in a complex electromagnetic environment, and is an important part of the electronic countermeasure system. [0003] Modern radars have developed towards multi-functional and multi-purpose new systems and new technologies. A radar may have multiple working states and multiple systems, and various complex waveforms are often designed, which destroys signal sorting and The regularity used in identification poses a great challenge to the radar reconnaissance system, and the increase in the number of various electronic countermeasures equipment makes the rad...

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Problems solved by technology

[0004] For complex electromagnetic environments, radar emitter signals often overlap in the time domain, space domain, and frequency domain. Traditional radar signal sorting methods have serious "increased batches" and "missed batches". The high density of the signal environment, It also makes the traditional sorting process a lot of calculations, which will lead to the failure of signal sorting, so it is urgent to explore new signal sorting methods

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