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

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 ...

AI Technical Summary

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 have different signal-to-noise ratios, and these four signals are not necessarily Statistically independent, these degrade the detection performance of uniformly weighted non-coherent accumulation detectors

Images