| 引用本文: | 黄冬梅,张钦宇.IR-UWB近距离实孔径成像系统分辨率[J].哈尔滨工业大学学报,2011,43(9):67.DOI:10.11918/j.issn.0367-6234.2011.09.014 |
| HUANG Dong-mei,ZHANG Qin-yu.Resolution of IR-UWB near-field real-aperture imaging systems[J].Journal of Harbin Institute of Technology,2011,43(9):67.DOI:10.11918/j.issn.0367-6234.2011.09.014 |
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| 摘要: |
| 为了解决传统"窄带、远场"分辨率计算公式不再适用于超宽带极窄脉冲(IR-UWB)近距离实孔径成像系统的问题,提出了一种新的分辨率的计算方法.通过对IR-UWB近距离成像原理的分析,推导了单天线在距离向及横向分辨率的解析表达式,结合图像重建过程中信号叠加原理,提出了一种实孔径均匀线阵分辨率的计算方法.通过对理想点目标成像结果的数值仿真,验证了该分辨率计算方法的正确性. |
| 关键词: 分辨率 超宽带极窄脉冲 实孔径天线阵 近场 成像 |
| DOI：10.11918/j.issn.0367-6234.2011.09.014 |
| 分类号:TN820.15 |
| 基金项目:国家自然科学基金资助项目(60702034) |
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| Resolution of IR-UWB near-field real-aperture imaging systems |
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HUANG Dong-mei, ZHANG Qin-yu
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Shenzhen Graduate School,Harbin Institute of Technology,518055 Shenzhen,China
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| Abstract: |
| To solve the problem that the traditional "narrow-band,far-field" resolution formulas are no longer suitable for Impulse Radio Ultra-Wide Band(IR-UWB) real aperture imaging systems,a new algorithm to compute the resolution was proposed.On analysis of IR-UWB near-field imaging principle,the formulation of resolution in down-and cross-range for single antenna was derived.Combined with signal superposition in the process of imaging,an algorithm to compute the resolution for real-aperture uniform linear array was presented.Numerical simulation results of ideal point targets imaging verified the correctness of the algorithm. |
| Key words: resolution IR-UWB real-aperture antenna arrays near-field imaging |
