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Target Detection Method Based on Hybrid Polynomial Phase Function for Extended Maneuvering Range

A technology of range extension target and phase function, which is applied in the field of maneuvering range extension target detection based on hybrid polynomial phase function, and can solve problems such as being more sensitive to fluctuations

Inactive Publication Date: 2017-03-29
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

But both have shortcomings, among which PCPF is more sensitive to the fluctuation of CPF, while ICPF omits the influence of smaller values

Method used

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  • Target Detection Method Based on Hybrid Polynomial Phase Function for Extended Maneuvering Range
  • Target Detection Method Based on Hybrid Polynomial Phase Function for Extended Maneuvering Range
  • Target Detection Method Based on Hybrid Polynomial Phase Function for Extended Maneuvering Range

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing:

[0023] refer to figure 1 , is a flow chart of the method for detecting a maneuvering distance extended target based on a mixed polynomial phase function of the present invention. The method for detecting a maneuvering distance extended target based on a mixed polynomial phase function includes the following steps:

[0024] Step 1, use the radar to transmit the signal, use the radar to receive the echo signal, and then mix the echo signal and the reference signal to obtain the mixed signal r (de-skewing the echo signal, so as to realize the down-conversion of the signal, Get the mixed signal r); get the discrete polynomial phase function DCPF of the mixed signal r r(n) (n,m):

[0025]

[0026] Among them, N is the length of the signal r after frequency mixing, l is the introduced discrete delay variable, n is the discrete time variable, n=0,1,...,N-1; m is the discrete...

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Abstract

The invention belongs to the technical field of radar target detection, and particularly relates to a maneuvering range extended target detection method based on a mixed polynomial phase function. The method comprises the specific steps that a radar is used for emitting a signal and receiving an echo signal, frequency mixing is carried out on the echo signal and a reference signal, and a signal r is obtained after frequency mixing; a discrete polynomial phase function DCPF| r(n)(n, m) of the signal r obtained after frequency mixing is obtained, n is a discrete time variable, and m is a discrete frequency modulation rate variable; the discrete polynomial phase function of the signal r obtained after frequency mixing is fragmented into a plurality of fragments not overlapped at equal intervals along a time shaft, and each fragment has NS time sampling points; according to the discrete polynomial phase function of each fragment, a mixed polynomial phase function H(m) of the signal obtained after frequency mixing is built; a test statistical magnitude u is obtained by building the mixed polynomial phase function H(m) of the signal obtained after frequency mixing; a detection threshold eta is set, if u>=eta, it is considered that a target exists, and if u<eta, it is considered that no target exists.

Description

technical field [0001] The invention belongs to the technical field of radar target detection, in particular to a maneuvering range extension target detection method based on a mixed polynomial phase function. Background technique [0002] The echo signal of a target is related to two radar constants: the wavelength of the transmitted signal and the range resolution. If the size of the target along the radar line of sight is larger than the wavelength of the radar emission wave, then the target can be regarded as a combination of a series of scattered physical reflection centers, and the echo signal can be regarded as the superposition of echoes reflected by multiple individual scattering centers . [0003] In recent years, high-resolution radar has made great progress and has been widely used in imaging. In high-resolution radar systems, the range resolution is smaller than the size of the target in the radar line-of-sight direction. Therefore, the scattering centers are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41G01S13/04
CPCG01S7/41G01S13/04
Inventor 李明曹润清左磊姚菲
Owner XIDIAN UNIV