非中心化chi平方伽玛分布杂波模型

韦布尔和对数正态分布雷达杂波模型可描述海杂波的分布,但实现模型不同,且不能对杂波物理成因做出合理解释.这里提出一种非中心化chi平方伽玛分布模型,可精确地模拟海杂波,概率分布特性可与上述两者接近,并且能从物理含义说明杂波产生机理.模拟结果的概率密度分布和功率谱密度估计显示出这种模型具有很好的性能.

Cumulant-Based Two-Dimensional DOA and Polarization Estimation with a Polarization Sensitive Array Comprising a Spatially Stretched Tripole

Joint estimation of DOA and polarization of non-Gaussian narrow-band signal with a polarization sensitive (PS) array,which includes a spatially and sparsely stretched tripole sub-array along with two guiding sensors,is addressed in this paper.The rest of this PS array may have arbitrary and possibly unknown response and geometry.Trivial ambiguity involved in the 3-D polarization-angular coherence structure (PACS) is investigated and 2-D DOAs and polarizations are further obtained by associating the PACS and the spatial coherence structure simultaneously recovered from a parallel cumulative ESPRIT step.Two issues on effect of phase wrapping and optional inherent structure of the spatially stretched tripole are also included.