Full coherent full polarization MIMO radar four-channel integrated target detecting method

A polarization channel and full polarization technology, applied in the field of radar, can solve the problems of different and lower detection performance of non-coherent accumulation detectors, so as to increase the amount of information and improve the detection performance

Inactive Publication Date: 2017-04-26
XIDIAN UNIV
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Problems solved by technology

However, for fully coherent and fully polarized MIMO radars, due to the different polarization scattering characteristics of radar targets, the target echo signals of four different polarization channels may

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  • Full coherent full polarization MIMO radar four-channel integrated target detecting method
  • Full coherent full polarization MIMO radar four-channel integrated target detecting method
  • Full coherent full polarization MIMO radar four-channel integrated target detecting method

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[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings:

[0035] Reference figure 1 , The implementation steps of the present invention are as follows:

[0036] Step 1. The orthogonal polarization channel of the fully coherent fully polarized MIMO radar transmits signals whose waveforms are orthogonal to each other.

[0037] The fully coherent and fully polarized MIMO radar includes two transmission channels, a vertical polarization transmission channel V and a horizontal polarization transmission channel H. The two transmission channels transmit signals at the same time, and the signal transmitted by the vertical polarization transmission channel V is s V (t), the signal emitted by the horizontally polarized emission channel H is s H (t);

[0038] The two transmit signals s V (t) and s H (t) Satisfy the following relational expressions and make their waveforms orthogonal to each other:

[0039]

[0040] Among them, t repres...

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Abstract

The invention discloses a full coherent full polarization MIMO radar four-channel integrated target detecting method, which is used to solve a problem of a conventional non-coherent accumulation detector that detection performance is lowered, when signal-to-noise ratios of echo signals of four polarization channels are different. The full coherent full polarization MIMO radar four-channel integrated target detecting method comprises steps that 1) a full coherent full polarization MIMO radar is used to transmit signals, the waveforms of which are orthogonal to each other, by orthogonal polarization channels; 2) the full coherent full polarization MIMO radar is used to receive the echo signals by the orthogonal polarization channels; 3) the four-way pulse compression of the echo signals received by the orthogonal polarization channels is carried out, and the echo signals of the four polarization channels are acquired; 4) the signal-to-noise ratio weighting integrated detection of the echo signals of the four polarization channels is carried out. Compared with the prior art, the full coherent full polarization MIMO radar four-channel integrated target detecting method has constant false alarm performance, and the better detection performance is also provided, and therefore the full coherent full polarization MIMO radar four-channel integrated target detecting method can be used to realize the target detection of the full coherent full polarization MIMO radar under a noise background.

Description

technical field [0001] The invention belongs to the technical field of radar, and specifically relates to a method for detecting a target, which can be used to realize the detection of a target by a full-coherent full-polarization MIMO radar under a noise background. Background technique [0002] Existing research results have shown that, like frequency diversity and space scattering diversity, fully polarimetric radar can obtain the polarization diversity gain of space targets and improve the target detection performance of radar systems. The core idea of ​​fully coherent fully polarized MIMO radar is that the radar transmitted signal is obtained by coherent superposition of two modulated signals with a certain bandwidth, and the transmitted waveforms of the two orthogonal polarization channels are as orthogonal as possible, that is, the cross-correlation function of the two As small as possible, and then carry out two-way orthogonal waveform correlation reception for each ...

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Application Information

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IPC IPC(8): G01S7/02
CPCG01S7/024
Inventor 周生华张新勋刘宏伟徐磊磊刘军
Owner XIDIAN UNIV
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