Complex multi-stagger signal sorting method based on EDW fusion

Abstract

The invention relates to a complex multi-stagger signal sorting method based on EDW (Emitter Descriptor Word) fusion, which is mainly used to solve the problem that it is difficult to sort complex multi-stagger signals (stagger signals of which the stagger number N is larger, N is usually greater than or equal to 10). The method is implemented by the steps as follows: (1) for PDW (Pulse DescriptorWord) data input in real time within a sorting interval T, generating sorting interval EDWs through an improved PRI (Pulse Repetition Interval) transformation method, and representing all the generated sorting interval EDWs by a set Enow; (2) determining complex multi-stagger signal fusion conditions for any two EDWs in Enow (determining fusion conditions of frequency and pulse width first and then determining fusion conditions of PRI features), determining whether any two EDWs have multiple consecutive and identical sub PRIs, and fusing two EDWs if the two EDWs meet the conditions; and (3) fusing all EDWs meeting the complex multi-stagger signal fusion conditions in Enow and outputting a complex multi-stagger signal EDW formed by fusion. The method can improve the accuracy of complex multi-stagger signal sorting, and can be used in a radar detection system.

Description

technical field [0001] The invention belongs to the technical field of radar data processing and signal sorting. Background technique [0002] Signal sorting refers to the pulse descriptor (Pulse Descriptor Word, PDW) formed according to the measurement parameters of the emitter signal, and the generation of the emitter descriptor (Emitter Descriptor Word, EDW) through pulse train deinterleaving. [0003] The more the number of staggered periods of the staggered signal, the more complex its time-domain modulation form; the complex multiple staggered signal in the present invention specifically refers to the staggered signal with a large number of staggered numbers N, generally N>=10. [0004] Sorting of complex multi-staggered signals is a difficult problem. This is because the two main methods of traditional staggered signal sorting, that is, the skeleton period sorting method and the subperiod sorting method, are not suitable for the sorting of complex multi-staggered ...

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Problems solved by technology

This is because the two main methods of traditional staggered signal sorting, that is, the skeleton period sorting method and the subperiod sorting method, are not suitable for the sorting of complex multi-staggered signals.

When using the skeleton period method, in order to meet the real-time requirements of signal sorting, it is usually necessary to control the computational complexity and memory consumption of the sorting algorithm. It is easy to cause its skeleton period to be greater than the maximum value of the skeleton period set, resulting in the failure of sorting; while using the sub-period method, when there are fewer intercepted pulses, the PRI (Pulse Repetition Interval, pulse repetition interval) ) corresponds to a small number of intercepted pulses, resulting in a low height of the histogram box corresponding to each sub-period when performing histogram statistics, and there is a great probability that the threshold cannot be passed, resulting in sorting failure or only few sub-period

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