Maneuvering target parameter estimation method based on compressed sensing

A technology for parameter estimation and maneuvering targets, which is applied in the field of radar detection and can solve problems such as unreasonable assumptions

Inactive Publication Date: 2013-05-08
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

In the past two years, aiming at the problem of maneuvering target detection with Doppler movement in STAP, Wu Renbiao et al. have focused on the problem of

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  • Maneuvering target parameter estimation method based on compressed sensing
  • Maneuvering target parameter estimation method based on compressed sensing
  • Maneuvering target parameter estimation method based on compressed sensing

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Embodiment Construction

[0043] The compressed sensing-based maneuvering target parameter estimation method provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] like figure 1 As shown, the maneuvering target parameter estimation method based on compressed sensing provided by the present invention includes the following steps carried out in order:

[0045] 1) Estimate the clutter covariance matrix using the data of the reference unit;

[0046] Assume that an N-element uniform linear array is placed along the heading direction on the airborne platform, and the distance between array elements is d=0.5λ, where λ is the radar emission pulse wavelength, and K pulses are emitted within one CPI, x nk is the complex sampling value corresponding to the nth array element on the kth pulse, then the received data on each range gate can be written as an N×K matrix as follows:

[0047]

[0048] Considering that the num...

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Abstract

A maneuvering target parameter estimation method based on compressed sensing comprises the following steps: estimating a clutter covariance matrix by using data of a reference unit, restraining clutter to data of a unit under a test, scattering coming directional angle space, speed space and acceleration space of a objective, establishing objective space-time frequency three dimensional parameters according to scattered parameter space and estimating required base dictionary, obtaining objective parameter rough estimating values based on compressed sensing through sparse solution and recording the objective parameter rough estimating values as construction cost function, raking in a local range with the rough estimating values as domain to achieve objective parameter accurate estimate, and obtaining final estimating results. The maneuvering target parameter estimation method based on the compressed sensing can be used for realizing that an airborne phased array radar accurately estimates space-time frequency three dimensional parameters of an air maneuvering objective.

Description

technical field [0001] The invention belongs to the technical field of radar detection, and in particular relates to a maneuvering target parameter estimation method based on compressed sensing, which can be used for accurate estimation of space-time-frequency three-dimensional parameters of a maneuvering target by an airborne phased array radar. Background technique [0002] When the airborne radar looks down, the weak target signal is often submerged in the strong ground clutter that broadens the Doppler spectrum due to the movement of the platform, so the method of Doppler processing with only the echo signal received by a single channel cannot Suppress ground clutter with the same Doppler frequency as the moving target. The phase center offset antenna (displaced phase center antenna, DPCA) technology is a method that uses multiple channels to process the received space-time sampling signal at the same time, but it is easily affected by various non-ideal factors such as c...

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Application Information

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IPC IPC(8): G01S7/41
Inventor 贾琼琼吴仁彪
Owner CIVIL AVIATION UNIV OF CHINA
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