稀疏频带空间目标雷达成像

对稀疏频带超宽带ISAR成像进行了研究,提出了与实际情况更相符的空间目标稀疏频段成像步骤.以往这类问题主要针对一维稀疏向量,且都直接采用正弦信号模型开始分析.事实上,在ISAR二维信号处理中,不同频带的方位像由于慢时间采样尺度不同而有较大的差异,且由于速度的影响不同频段下的回波信号也无法用统一的正弦信号模型来表示.对这些以往稀疏频段成像研究中常常忽略的重要部分进行了详细的论述,进而给出了等效超宽带成像的方法.

Radar imaging for space targets in sparse band

An approach for ISAR sparse band imaging of space targets by fusion sparse subband data is proposed.Previous sparse band coherent processing methods are mainly for one-dimensional sparse vector and directly use sine signal model for analysis.In fact,in ISAR 2-D signal processing,for a target,the cross range resolution cells in different bands have small difference due to Doppler sampling scale.Moreover,due to speed effect,echo signals under different bands cannot be represented by unified sine signal model....