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Broadband polarization radar target detection method based on stokes vector decomposition

A broadband polarization and radar target technology, applied in radio wave measurement systems, complex mathematical operations, instruments, etc., can solve the problems of unguaranteed real-time performance and large amount of calculation, and achieve the effect of meeting real-time requirements

Pending Publication Date: 2021-07-13
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the feature calculation of this method is large, and the real-time performance cannot be guaranteed.

Method used

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  • Broadband polarization radar target detection method based on stokes vector decomposition
  • Broadband polarization radar target detection method based on stokes vector decomposition
  • Broadband polarization radar target detection method based on stokes vector decomposition

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Embodiment 1

[0063] Such as figure 1 as well as figure 2 As shown, a kind of broadband polarization radar target detection method based on Stokes vector decomposition provided by the present invention comprises:

[0064] S1, performing Stokes decomposition on the dual-polarization radar echo data to obtain a component sequence;

[0065] S2, using a multi-channel detection algorithm based on order statistics to detect the component sequence according to a preset detection threshold, and obtain a detection result;

[0066] Wherein, the detection result indicates whether the distance unit is a target;

[0067] S3, the detection results are fused to obtain a final fused detection result.

[0068] A kind of broadband polarization radar target detection method based on Stokes vector decomposition proposed by the present invention, by carrying out Stokes decomposition to the dual-polarization radar echo data obtained from the radar system, obtains the component sequence; According to the dete...

Embodiment 2

[0070] As an optional embodiment of the present invention, the Stokes decomposition is performed on the dual-polarization radar echo data, and the obtained component sequence includes:

[0071] For dual-polarization radar echo data S hp (n) and S vp (n), use the decomposition formula for polarization decomposition, and get the corresponding four-component sequence g 0 (n), g 1 (n), g 2 (n), g 3 (n);

[0072] The decomposition formula is:

[0073] Among them, p represents the polarization mode of the transmitted waveform, h represents the horizontal reception, v represents the cross-polarization reception, and n represents the time series, which corresponds to the distance information in space.

Embodiment 3

[0075] As an optional embodiment of the present invention, the detection threshold is calculated and obtained through the following steps:

[0076] Step a: Based on the false alarm rate of multiple component sequences, determine the total false alarm rate P required by the detection system fa ;

[0077] Among them, P fa usually 10 -4 or 10 -6 . Total false alarm rate P fa is jointly determined by the false alarm rate of multiple components, since the polarizability at the same distance unit on the missile-borne platform can be approximately 0, that is, g 1 , g 2 , g 3 The clutter parts of the three components are approximately regarded as mutually uncorrelated. The multi-channel detection algorithm based on order statistics selects 6 channels.

[0078] Step b: Based on the total false alarm rate P fa , calculate the false alarm rate P of a single channel sfa ;

[0079] This step can be by the total false alarm rate P fa As the input of the single channel calculati...

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Abstract

The invention provides a broadband polarization radar target detection method based on Stokes vector decomposition, and the method comprises the steps: carrying out the Stokes decomposition of dual-polarization radar echo data obtained from a radar system, and obtaining a component sequence; according to a preset detection threshold, detecting the component sequence by using a multi-channel detection algorithm based on sequence statistics to obtain a detection result; and fusing the detection results to obtain a final detection result after fusion. According to the invention, the signal-to-clutter ratio of the target is increased by using the difference between the polarization characteristics of the target and the clutter, and the target is detected by combining and using the multi-channel detection algorithm which is high in target energy accumulation efficiency and based on the sequence statistics, so that the target detection probability of the broadband polarization system radar is improved, engineering implementation is easy, the method is applied to a radar system, and accurate detection of the radar on the target is facilitated.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, in particular to a wideband polarization radar target detection method based on Stokes vector decomposition. Background technique [0002] The radar target detection technology detects the target from the observation background by detecting the radar echo, and returns the position information of the target. Radar target detection technology is the basis for radar seeker to identify and track targets. A good radar target detection technology can provide a strong guarantee for the stability of the overall performance of the radar. [0003] With the development of wideband radar system, the resolution of radar has been improved. The high-resolution range image imaging technology of broadband system radar processes the radar echo signal to obtain a one-dimensional range image of the target with high resolution in range. The target appears as multiple scattering points on the echo, w...

Claims

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Application Information

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IPC IPC(8): G01S7/41G06F17/11
CPCG01S7/414G06F17/11Y02A90/10
Inventor 刘峥张现铭王晶晶谢荣
Owner XIDIAN UNIV