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A polarization calibration method for fully polarized multiple-input multiple-output synthetic aperture radar (fp-mimo-sar)

A technology of FP-MIMO-SAR and synthetic aperture radar, which is applied in the direction of radio wave reflection/re-radiation, instruments, measuring devices, etc., can solve the problems not mentioned in FP-MIMO-SAR system, etc., and achieve improved polarization Effect of Calibration Accuracy

Active Publication Date: 2021-06-29
BEIHANG UNIV
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Problems solved by technology

FP-MIMO-SAR systems are barely mentioned in existing literature

Method used

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  • A polarization calibration method for fully polarized multiple-input multiple-output synthetic aperture radar (fp-mimo-sar)
  • A polarization calibration method for fully polarized multiple-input multiple-output synthetic aperture radar (fp-mimo-sar)
  • A polarization calibration method for fully polarized multiple-input multiple-output synthetic aperture radar (fp-mimo-sar)

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Embodiment Construction

[0072] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0073] figure 1 Schematic diagram for active polarization calibration of MIMO arrays using RODAPARC, figure 2 Schematic diagram for RODAPARC bi-station PSM derivation, image 3 is the variation curve of the channel imbalance with the channel, Figure 4 For the uncalibrated full polarization image of a metal cylinder obtained by FP-MIMO-SAR, Figure 5 Calibrated full polarization image for a metal cylinder acquired with FP-MIMO-SAR.

[0074] The present invention provides a kind of FP-MIMO-SAR polarization calibration method, the specific introduction of this method is as follows:

[0075] Such as figure 1 As shown, the FP-MIMO-SAR system has a linear antenna array with a total of 80 sets of transceiver channels. RODAPARC has two antennas that can rotate independently. RODAPARC is placed ...

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Abstract

The invention discloses a polarization calibration method for a full-polarization multiple-input multiple-output synthetic aperture radar (FP-MIMO-SAR). The method uses a rotatable dual-antenna active polarization calibrator (RODAPARC) and a standard metal cylinder as polarization calibration object, and achieve polarization calibration through the following two steps: first, using the RODAPARC bistatic polarization scattering matrix (PSM) and active polarization calibrator full polarization (PARC‑FP) radar polarization calibration model, for In FP‑MIMO‑SAR, N groups of transceiver channels and 4 polarization combinations per channel are used for active polarization calibration to obtain N groups of polarization calibration parameters; The calibration parameters of group polarization are optimized to realize radiation calibration, crosstalk and channel imbalance calibration of radar system.

Description

technical field [0001] The invention relates to the technical field of multiple-input multiple-output (MIMO) radar, in particular to a polarization calibration method for a full-polarization multiple-input multiple-output synthetic aperture radar (FP-MIMO-SAR). Background technique [0002] MIMO technology was first applied in the communication system to overcome the multipath effect, and then it was introduced into the radar field, and a new radar system based on MIMO technology was proposed (see literature [1] Bliss D W, Forsythe K W, Hero AO, et al.Environmental issues for MIMO capacity[J]. IEEE Transactions on Signal Processing, Vol.50, No. 9, pp:2128-2142, 2002.). In order to solve the new requirements faced by the synthetic aperture radar (SAR) system, MIMO technology was introduced into the synthetic aperture radar system (see literature [2]Ender J H G.MIMO-SAR[C] / / Proc.ofInt.Radar Symp. ( IRS). Cologne, Germany: [s.n.]: pp: 580-588, 2007.), proposed MIMO-SAR. Using...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40G01S13/90
CPCG01S7/40G01S13/90G01S13/9076
Inventor 孔令宇许小剑
Owner BEIHANG UNIV
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