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PRI dithering signal sequence difference non-uniform quantization sorting method

A jittering signal and non-uniform technology, applied in the field of electronic reconnaissance, can solve problems such as the divergence of histogram statistical results, the failure of sorting methods, and the inability to count potential PRI values, etc., and achieve the effect of effective extraction

Active Publication Date: 2018-06-19
SHANDONG INST OF AEROSPACE ELECTRONICS TECH
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Problems solved by technology

[0003] These conventional main sorting algorithms can achieve better results for pulse sequences with a small amount of jitter, and pulse sequences with a large amount of jitter will cause the histogram statistical results to diverge, and the potential PRI value cannot be calculated, resulting in the failure of the sorting method

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  • PRI dithering signal sequence difference non-uniform quantization sorting method
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  • PRI dithering signal sequence difference non-uniform quantization sorting method

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Embodiment Construction

[0033] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0034] This embodiment provides a method for non-uniform quantization and sorting of PRI jitter signal sequence difference, the method sorts the pulse repetition interval PRI jitter signal, and the specific process of the method is as follows figure 1 shown, including the following steps:

[0035] S1, put [(1-α)T PRI , (1+α)T PRI ]

[0036] All TOA difference results of time-of-arrival TOA sequences in the range are quantized by non-uniform quantization as T PRI Adjacent integer value, obtain the quantized TOA difference result; where T pri Denote the PRI value of the PRI jitter signal, and the jitter amount is α.

[0037] Among them, for the PRI jitter signal, the PRI jitter signal is obtained in [(1-α)T PRI， (1+α)T PRI ] pulse sequence within the time range, in this embodiment, the pulse arrival time sequence, that is, the TOA sequence, is differe...

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Abstract

The invention discloses a PRI dithering signal sequence difference non-uniform quantization sorting method, which can carry out non-uniform quantization on a pulse sequence time of arrival (TOA) difference result, enable a statistical result to be focused and complete extraction of a hidden PRI value. The method carries out sorting in view of the PRI dithering signals and comprises the following steps: the PRI dithering signal has a PRI value of Tpri and a dithering amount of alpha; TOA sequence difference results in a range of (1-alpha)TPRI to (1+alpha)TPRI are quantized to integer values near the TPRI, and a quantized TOA difference result is acquired; the quantized TOA difference result is subjected to histogram statistics, and a value exceeding a preset threshold Tthreshold in the histogram is taken as a hidden PRI value. The hidden PRI value is determined to be a real PRI value through sequence retrieval, a pulse sequence corresponding to the real PRI value is extracted from the PRI dithering signal, and sorting of the PRI dithering signal sequence is realized.

Description

technical field [0001] The invention belongs to the field of electronic reconnaissance, and in particular relates to a method for non-uniform quantization and sorting of PRI jitter signal sequence differences. Background technique [0002] The electronic reconnaissance system is faced with complex random overlapping dense pulse streams generated by multiple radar radiation sources. To realize the characteristic analysis of each radar radiation source, the pulse sequence of each radiation source must be sorted first, that is, the signal sorting is completed. Signal sorting generally includes two processing processes: pre-sorting and main sorting. Pre-sorting uses parameters such as signal arrival direction, carrier frequency, and pulse width to classify and divide into multiple pre-sorting results; The sorting results are processed by inter-pulse correlation, mainly for PRI sorting, and the pulse sequence is extracted by using the characteristics of PRI. Conventional PRI mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/35G01S7/36G01S7/40
CPCG01S7/354G01S7/36G01S7/4004
Inventor 李民张长帅贺瑞于建明王金伟王帅
Owner SHANDONG INST OF AEROSPACE ELECTRONICS TECH
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