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Pulse Doppler radar amplitude jitter estimation method

A technology of pulse Doppler and Doppler frequency, which is applied in the field of pulse Doppler radar amplitude jitter estimation, can solve the problem of weakened detection ability and achieve the effect of simple evaluation method

Active Publication Date: 2016-11-09
山东山科感测智慧科技有限公司
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Problems solved by technology

[0003] If the amplitude jitter of the PD radar is too large, it will cause the static target to produce a feature similar to the Doppler effect, which will weaken the ability of the PD radar to detect the moving target by using the Doppler effect, especially when detecting the micro-moving target. Jitter is not negligible

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  • Pulse Doppler radar amplitude jitter estimation method

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] A method for estimating the amplitude jitter of a PD radar can detect and estimate the amplitude jitter of the PD radar simply, quickly and effectively. Each will be described in detail below.

[0032] The method flow is as follows figure 1 Shown:

[0033] 1. After the RF transmitter is connected to the attenuator, it passes through the transmission line and is directly transmitted to the RF receiver. Collect echo signal data processed by the receiver through a data acquisition card or an oscilloscope to obtain echo time domain data, such as figure 2 As shown, in this embodiment, 32 groups of time-domain data are continuously collected, and each group collects 1000 points

[0034] 2. Perform windowing and distance-to-Fourier transform on the data, and obtain the frequency domain data matrix after taking the modulus, such as image 3 As show...

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Abstract

The invention discloses a pulse Doppler radar amplitude jitter estimation method. 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; modular operation is carried out on the frequency-domain data, and Doppler filtering is carried out on the frequency-domain data matrix after modular operation, so as to acquire a Doppler spectrum; the ratio of the zero-Doppler frequency amplitude 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 estimating amplitude 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] If the amplitude jitter of the PD radar is too large, it will cause the static target to produce a feature similar to the Doppler effect, which will weaken the ability of the PD radar to detect the moving target by using the Doppler effect, especially when detecting the micro-moving target. Jitter cannot be ignored. [0004] Therefore, it is of great significance to clarify the amplitude jitter of pulse radar for the realization of moving target detection. Contents of the invention ...

Claims

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Application Information

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