Radar signal sorting method based on combination of SDIF and PRI transformation method

Abstract

The invention belongs to the technical field of electronic countermeasures, and particularly relates to a radar signal sorting method based on combination of an SDIF and a PRI transformation method. With the adoption of the method, the search effect is faster and more obvious. The method comprises the following steps that radar signals are pre-grouped; an arrival time difference histogram is established for pre-sorted radar groups by using the SDIF; the radar signals are quickly searched and extracted according to the time domain characteristics of a radar signal model; a first-level difference histogram is established to quickly analyze staggering signals; whether complex type radar signal residues exist or not is judged; and the sorting result of each module is inquired. The beneficial effects of the method are that pre-sorting and main sorting are combined, the SDIF and the PRI transformation method are combined to act as main sorting, the SDIF part performs quick and effective sorting on the conventional signals, the staggering signals, the inter-pulse frequency agility and the pulse group frequency agility signals in the complex radar electromagnetic environment, the PRI transformation method part sorts the remaining jitter signals, and each part of the algorithms performs its own functions and is connected to form an effective and quick comprehensive sorting algorithm.

Description

technical field [0001] The invention belongs to the technical field of electronic countermeasures, and in particular relates to a radar signal sorting method based on the combination of SDIF and PRI transformation method, which makes the search effect faster and more obvious. Background technique [0002] With the rapid development of radar technology, the complexity of the battlefield electromagnetic environment has further increased. The battlefield electromagnetic environment is changeable and there are many types of signals. The radar signal density reaches millions or even tens of millions per second. It is increasingly difficult for the combination of selection algorithms to cope with the complex electromagnetic environment, and the sorting performance and sorting speed need to be improved urgently. The traditional pre-sorting technology mainly uses the parameters in the pulse description word of the radar signal to carry out simple grouping with the tolerance. It is e...

AI Technical Summary

Problems solved by technology

[0003] The extended correlation method is the earliest algorithm used in single-parameter signal sorting, and it is also the most basic. It is suitable for the early simple radar electromagnetic environment; the CDIF method is a kind of radar signal sorting algorithm that is widely used now. On the basis of the statistical histogram, great improvements have been made, accumulating different levels of time difference of arrival, setting a reasonable detection threshold, and suppressing harmonics; SDIF is an improved version of CDIF, which no longer accumulates time difference of arrival, and the amount of calculation is reduced compared with CDIF half, but the detection threshold is difficult to set, and it is impos

Images