前視探地雷達(dá)合成孔徑成像方法的研究
Research on Forward-Looking Ground Penetrating Radar Synthetic Aperture Imaging
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摘要: 根據(jù)前視探地雷達(dá)波斜入射，并且經(jīng)過空氣和地下兩層介質(zhì)的特點(diǎn)，提出了基于等效波場(chǎng)和全息成像的頻率波數(shù)域前視探地雷達(dá)合成孔徑成像方法。該方法對(duì)地面以上的記錄剖面用基于全息成像的頻率波數(shù)域成像方法成像，對(duì)地面以下記錄剖面的成像，則用地面測(cè)線處的等效波場(chǎng)。所提方法把兩層介質(zhì)中的成像問題簡(jiǎn)化成單層介質(zhì)中的合成孔徑成像問題。對(duì)實(shí)驗(yàn)數(shù)據(jù)的處理結(jié)果表明，所提方法能有效地提高信雜比，提高目標(biāo)的方位分辨率。
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關(guān)鍵詞:
- 前視探地雷達(dá); 合成孔徑成像; 等效接收波場(chǎng)
Abstract: According to the characteristic that Forward Looking Ground Penetrating Radar (FLGPR) wave incidents aslant and propagates through two layer medium of the air and the ground, the Frequency-Wavenumber (F-W) Synthetic Aperture Imaging (SAI) method of FLGPR is proposed based on equivalent wavefield and hologram imaging. The proposed method images the recorded section above the ground by F-W SAI based on the hologram imaging method. Then, the recorded section underground is SAI with the equivalent wave field in the swath on the ground surface. The proposed method reduces the SAI in two layers to SAI in every layer respectively. The experimental results show that the proposed method is effective. -
張立國(guó)，孔令講，周正歐. 淺地層探地雷達(dá)合成孔徑處理的一種快速算法[J].電子與信息學(xué)報(bào).2004, 26(10):1645-1649瀏覽[2]Scheers B. Ultra-wideband ground penetrating radar with application to the detection of anti-personnel landmines[D]. [Ph.D thesis]. Royal Military Academy Department of Electrical Engineering and Telecommunication, Brussels. 2001.[3]Cosgrove R B, Milanfar P, Kositsky J. Trained detection of buried mines in SAR images via the deflection optimal criterion[J].IEEE Trans. on Geoscience and Remote Sensing.2004, 42(11):2569-2575[4]Sun Y, Li J. Time-frequency analysis for plastic landmine detection via forward-looking ground penetrating radar[J].IEE Proc.-Radar Sonar Navig.2003, 150(4):253-261[5]Sun Y, Li X, Li J. Practical landmine detector using forward looking ground penetrating radar[J].Electronics Letters.2005,41(2):97-98[6]Gu K, Wang G, Li J. Migration based SAR imaging for ground penetrating radar system[J].IEE Proc.-Radar Sonar Navig.2004, 151(5):317-325[7]Guasch J F. A novel 3-D subsurface radar imaging technique [J].IEEE Trans. on Geoscience and Remote Sensing.2002, 40(2):443-452[8]Peter T G, Bobby R H. Synthetic aperture radar image reconstruction algorithms designed for subsurface imaging[J]. IGARSS97, IEEE Proc.1997, vol. 4: 1588-1590.[9]Osumi N, Ueno K. Microwave holographic imaging method with improved resolution[J]. IEEE Trasns. on Antennas and Propagation, 1984, AP-32(10): 1018-1026.[10]Eide E S. Radar imaging of small objects closely below the earth surface[D].[Ph.d thesis]. Norwegian University of Science and Technology, August, 2000. -
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