作　　者： ; ;

机构地区： 哈尔滨工业大学

出　　处： 《哈尔滨工业大学学报》 2011年第9期67-73,共7页

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. 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.

关 键 词： 分辨率 超宽带极窄脉冲 实孔径天线阵 近场 成像

领　　域： [电子电信]