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Ground based synthetic aperture radar (GBSAR) with transmitting and receiving multiple antennas (MIMO) and using the processing technique called compressive sensing (CS)

A synthetic aperture radar, transmitting antenna technology, applied in the direction of utilizing re-radiation, radio wave measurement system, reflection/re-radiation of radio waves, etc., can solve problems such as speeding up image acquisition time

Pending Publication Date: 2021-02-19
UNIVERSITY OF FLORENCE
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  • Application Information

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Problems solved by technology

[0011] The first object of the invention is to propose a MIMO GBSAR system with a reduced number of antennas, which can overcome the disadvantages of known types of mechanical scanning GBSAR systems, speed up the acquisition time of images and the current MIMO GBSAR has strong side effects due to the regular spacing of the antennas. Disadvantages of flap

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  • Ground based synthetic aperture radar (GBSAR) with transmitting and receiving multiple antennas (MIMO) and using the processing technique called compressive sensing (CS)
  • Ground based synthetic aperture radar (GBSAR) with transmitting and receiving multiple antennas (MIMO) and using the processing technique called compressive sensing (CS)
  • Ground based synthetic aperture radar (GBSAR) with transmitting and receiving multiple antennas (MIMO) and using the processing technique called compressive sensing (CS)

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Embodiment Construction

[0022] Referring to the accompanying drawings, the transmitting and receiving unit U is connected to N by means of two switching systems (also called SPNT: Single Pole N-through) SW1 and SW2 respectively. TX transmit antenna and N RX Receive antenna. Similarly, each switching system can be replaced by SPDT pairs (SPNT: Single Pole Double Throw) arranged in a tree.

[0023] Similarly, the receiving switching system can be composed of parallel running N RX receiver instead.

[0024] Similarly, as with many types of MIMO systems, N TX Waveform division transmitters instead of transmit switching systems (see for example J.J.M. De Wit, et al. "Orthogonal Waveforms for FMCW MIMO Radar", Radar Conference (RADAR, 2011IEEE, pp. 686-691, 2011 (J.J.M. De Wit, et al . “Orthogonal waveforms for FMCWMIMO radar.” In Radar Conference (RADAR), 2011 IEEE, pp. 686-691, 2011)).

[0025] The radar target of the present invention is based on a specific distribution of transmit (TX) and receive...

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Abstract

Ground radar apparatus comprising: at least a main radar unit (U) provided with at least a transmitting unit (TX) and at least a receiving unit (RX); two parallel linear guides G1 and G2 with antennasecuring systems; NTX antennas connected to the transmitting unit TX; NRX antennas connected to the RX transmitting unit. This radar is a MIMO (Multiple Input Multiple Output) that operates as an interferometric GBSAR (Ground Based Synthetic Aperture Radar) exploiting a particular implementation of the processing technique called Compressive Sensing (CS). In a further configuration of the same radar the parallel linear guides are three, in this way it is possible to acquire two different interferograms of the same scenario that allow to calculate two different components of the possible displacement of the targets.

Description

technical field [0001] The invention relates to a synthetic aperture radar, in particular to a ground radar for remote sensing target displacement. Background technique [0002] Interferometric Ground-based Synthetic Aperture Radar (SAR) (GBSAR: Ground-based Synthetic Aperture Radar) has long been known and widely used to monitor landslides and large structures, as reported by Tarchi D. et al. "Landslide monitoring by using ground-based SAR interferometry : An application example on the Tessina landslide", (pp. 15-30, February 2003, Issues 1-2, Vol. 68, Engineering Geology) (Tarchi D. at al. Landslide monitoring by using ground based SARinterferometry: An example of application to the Tessina landslide”Engineering Geology, Vol. 68, no. 1-2, February 2003, pp. 15-30). [0003] This radar uses a pair of antennas (transmitting and receiving respectively) that move along a mechanical guide to acquire a radar image of a virtual opening equal to the scan length. [0004] Interfe...

Claims

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/9023
Inventor 马西米利阿诺·皮尔阿奇尼拉颇·米奇内西内达·鲁哈尼
Owner UNIVERSITY OF FLORENCE
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