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SPARX a MIMO Array for Ground-Based Radar Interferometry

機(jī)譯：SPARX一種用于地基雷達(dá)干涉測(cè)量的MIMO陣列

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Ground-Based SAR Interferometry (GB-InSAR) is nowadays a proven technique widely used for slope monitoring in open pit mines and landslide control. Traditional GB-InSAR techniques involve transmitting and receiving antennas moving on a scanner to achieve the desired synthetic aperture. Mechanical movement limits the acquisition speed of the SAR image. There is a need for faster acquisition time as it plays an important role in correcting rapidly varying atmospheric effects. Also, a fast imaging radar can extend the applications to the measurement of vibrations of large structures. Furthermore, the mechanical assembly put constraints on the transportability and weight of the system. To overcome these limitations an electronically switched array would be preferable, which however faces enormous technological and cost difficulties associated to the large number of array elements needed. Imaging Multiple-Input Multiple Output (MIMO) radars can be used as a significant alternative to usual mechanical SAR and full array systems. This paper describes the ground-based X-band MIMO radar SPARX recently developed by IDS GeoRadar in order to overcome the limits of IDS GeoRadar’s well-established ground based interferometric SAR systems. The SPARX array consists of 16 transmit and 16 receive antennas, organized in independent sub-modules and geometrically arranged in order to synthesize an equally spaced virtual array of 256 elements.
機(jī)譯：如今，地基SAR干涉測(cè)量法（GB-InSAR）已被廣泛用于露天礦的邊坡監(jiān)測(cè)和滑坡控制中。傳統(tǒng)的GB-InSAR技術(shù)涉及在掃描儀上移動(dòng)的發(fā)送和接收天線(xiàn)，以實(shí)現(xiàn)所需的合成孔徑。機(jī)械運(yùn)動(dòng)限制了SAR圖像的采集速度。需要更快的采集時(shí)間，因?yàn)樗诩m正快速變化的大氣影響中起著重要的作用。同樣，快速成像雷達(dá)可以將應(yīng)用擴(kuò)展到大型結(jié)構(gòu)的振動(dòng)測(cè)量。此外，機(jī)械組裝對(duì)系統(tǒng)的可運(yùn)輸性和重量施加了限制。為了克服這些限制，電子開(kāi)關(guān)陣列將是優(yōu)選的，但是其面臨與所需的大量陣列元件相關(guān)的巨大的技術(shù)和成本困難。成像多輸入多輸出（MIMO）雷達(dá)可以用作常規(guī)機(jī)械SAR和全陣列系統(tǒng)的重要替代方案。本文介紹了IDS GeoRadar最近開(kāi)發(fā)的地面X波段MIMO雷達(dá)SPARX，以克服IDS GeoRadar完善的地面干涉SAR系統(tǒng)的局限性。 SPARX陣列由16個(gè)發(fā)射天線(xiàn)和16個(gè)接收天線(xiàn)組成，這些天線(xiàn)被組織在獨(dú)立的子模塊中并進(jìn)行幾何排列，以合成256個(gè)元素的等間距虛擬陣列。

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