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A Fast Method for Detecting and Estimating Pulse Jitter of Pulse Doppler Radar

A pulsed Doppler, radar pulse technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as the weakening of detection capabilities, and achieve the effect of simple evaluation methods

Active Publication Date: 2018-06-19
山东山科感测智慧科技有限公司
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Problems solved by technology

[0003] The pulse jitter of PD radar includes time jitter and amplitude jitter. If the pulse jitter of the radar is too large, it will weaken its ability to detect moving targets by using the Doppler effect.

Method used

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  • A Fast Method for Detecting and Estimating Pulse Jitter of Pulse Doppler Radar
  • A Fast Method for Detecting and Estimating Pulse Jitter of Pulse Doppler Radar
  • A Fast Method for Detecting and Estimating Pulse Jitter of Pulse Doppler Radar

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] A method for quickly detecting and estimating PD radar pulse jitter, the implementation steps of the method are as follows:

[0031] (1) Collect echo signal data or processed echo signal data of stationary targets (or transmission lines) through a data acquisition card or an oscilloscope;

[0032] (2) Windowing is carried out to the echo data of (1) gained, then carry out range to Fourier transform and obtain frequency domain matrix data;

[0033] (3) carry out Doppler filter to the frequency domain matrix data of (2) gained, and seek modulus, obtain Doppler spectrum;

[0034] (4) Compare the ratio of the zero Doppler frequency amplitude of the Doppler spectrum obtained in (3) to the maximum amplitude of the non-zero Doppler frequency (or the cumulative amplitude of the non-zero Doppler frequency), the larger the ratio , the smaller the pulse j...

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Abstract

The invention discloses a method used for fast detecting and pulse Doppler radar pulse jitter estimating. The method comprises the steps that echo signal data of a stationary object or processed echo signal data are collected; windowing and Fourier transform in direction are carried out on the data to acquire a frequency-domain data matrix; Doppler filtering is carried out on the frequency-domain matrix data, and modular operation is carried out, so as to acquire a Doppler spectrum; the ratio of the zero-Doppler frequency amplitude of the acquired Doppler spectrum to the maximum non-zero Doppler frequency amplitude is acquired; and jitter amplitude is evaluated according to the ratio. According to the invention, the residual clutter intensity of a strong stationary target signal during Doppler processing can be evaluated, and the ability of jiggle target detection of a radar system is evaluated.

Description

technical field [0001] The invention relates to a method for quickly detecting and estimating pulse jitter of pulse Doppler radar. Background technique [0002] Pulse Doppler radar (PD radar) is widely used in airborne fire control, airborne early warning and other fields. Its coherence and high stability of carrier frequency are the two most important characteristics of PD radar identification. The coherent nature of PD radar makes it possible to detect moving targets by using the Doppler effect. [0003] The pulse jitter of PD radar includes time jitter and amplitude jitter. If the pulse jitter of the radar is too large, it will weaken its ability to detect moving targets by using the Doppler effect. [0004] Therefore, it is of great significance to clarify the pulse jitter level of pulse radar to realize target detection. Contents of the invention [0005] In order to evaluate the pulse jitter level of pulse radar and then evaluate its ability to detect moving targe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 赵兴文杨秀蔚颜广杨传法常天英田现忠
Owner 山东山科感测智慧科技有限公司
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