Maneuvering target radial acceleration and speed estimation method based on orthogonal match pursuit

A technology of orthogonal matching pursuit and speed estimation, applied in radio wave measurement systems, instruments, etc., can solve problems such as high sampling frequency, insufficient estimation accuracy, and long signal time

Inactive Publication Date: 2012-07-18
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to propose a method for estimating acceleration and velocity based on orthogonal matching pursuit to solve the problems of insufficient estimation accuracy, excessive sampling frequency and excessive signal duration of existing FRFT-based acceleration and velocity estimation methods

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  • Maneuvering target radial acceleration and speed estimation method based on orthogonal match pursuit
  • Maneuvering target radial acceleration and speed estimation method based on orthogonal match pursuit
  • Maneuvering target radial acceleration and speed estimation method based on orthogonal match pursuit

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Embodiment Construction

[0054] The method for estimating acceleration and velocity based on sparse decomposition of the present invention will be described in detail below with reference to the accompanying drawings. (Refer to the attached figure 1 ).

[0055] Embodiment condition: assume radar wavelength λ=8mm, radar pulse width T=10ms, sampling interval T s =5×10 -5 seconds, and the sampling interval under the condition of undersampling is T′ s =2×10 -4 second; maneuvering target radial velocity v=20m / s, acceleration a=80m / s 2 .

[0056] According to the above conditions by:

[0057] s ( t ) = exp ( j 2 πt 2 v 0 λ + jπt 2 2 a ...

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Abstract

The invention discloses a maneuvering target radial acceleration and speed estimation method based on an orthogonal match pursuit, belonging to the field of radar signal processing. According to the maneuvering target radial acceleration and speed estimation method, a radial acceleration and a radial speed of a high-speed and large-maneuvering target can be rapidly accurately determined, the tracking performance and the recognition capability of a radar to the high-speed and large-maneuvering target are effectively improved, the response time of a weapon system is increased, and the attacking capacity to the target is enhanced. The maneuvering target radial acceleration and speed estimation method provided by the invention comprises the following steps of: 1, sampling a signal received by a radar, establishing a complete atom library; 2, carrying out orthogonal match pursuit decomposition on the signal; and 3, searching a sparse solution energy diagram peak value, determining a radial acceleration and a radial speed of the signal according to peak value coordinates. The maneuvering target radial acceleration and speed estimation method has the advantages of high instantaneity, accuracy in radial acceleration and speed estimation, easy realization of engineering, stronger engineering application value and popularization prospect, and can be used in the fields of improving high-maneuvering target real-time accurate pursuit and radar target type recognition, and the like.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and is suitable for estimating the radial acceleration and velocity of high maneuvering targets by high / medium pulse repetition frequency radars (such as airborne pulse Doppler radars, etc.). Background technique [0002] At present, air targets such as airplanes and missiles are developing towards high speed and high maneuverability, and this kind of movement characteristics of the target has caused great difficulties in radar tracking. If the radial acceleration and speed of the target can be quickly determined, it will be effectively improved. Real-time tracking accuracy and reliability of the target; at the same time, fast and accurate determination of the target acceleration is also helpful for the classification and identification of the target, so the fast and accurate estimation of the radial acceleration and velocity of the large maneuvering target is very important for improving th...

Claims

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Application Information

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IPC IPC(8): G01S7/41
Inventor 王国宏贾舒宜谭顺成张磊
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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