Clutter Rank of STAP in MIMO Radar With Waveform Diversity
Clutter Rank of STAP in MIMO Radar With Waveform Diversity
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DOI：
10.1109/tsp.2009.2031301
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发表时间：
2010-02
影响因子：
5.4
通讯作者：
Guohua Wang;Yilong Lu
中科院分区：
文献类型：
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作者：
Guohua Wang;Yilong Lu
近年来，多输入多输出（MIMO）雷达系统与空时自适应处理（STAP）已被提出来提高雷达性能。对于具有STAP的MIMO雷达，一个大的关注点是杂波秩。目前的研究采用时间带宽积的规则来预测的杂波秩的MIMO雷达使用正交波形。本文研究了具有更灵活的波形分集的MIMO雷达系统的杂波秩估计，其中波形不受正交约束。在一般波形假设下，推导了杂波协方差矩阵与波形协方差矩阵的关系。然后发现杂波秩由WCM的秩和结构决定。对于不同的波形情况，WCM可以是满秩或秩不足。在这些情况下，杂波秩的估计规则提供和数值模拟证明。
In recent years, multiple-input multiple-output (MIMO) radar systems with space-time adaptive processing (STAP) have been proposed to improve radar performance. For MIMO radars with STAP, one big concern is the clutter rank. Current studies employ the rule of time-bandwidth product to predict the clutter rank of MIMO radars using orthogonal waveforms. This paper investigates clutter rank estimation for MIMO radar systems with more flexible waveform diversity, where waveforms are not constrained to be orthogonal. Under general waveform assumption, we have derived the clutter covariance matrix as a function of waveform covariance matrix (WCM). The clutter rank is then found to be determined by the rank and structure of the WCM. For different waveform cases, the WCM may be either full rank or rank deficient. Rules for estimation of clutter rank in these cases are provided and demonstrated by numerical simulations.