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从真实海杂波数据出发,对低擦地角雷达海杂波的复合特性进行了深入研究,证明其幅度分布特性可以用复合K分布模型较好地描述,相关函数具有与幅度分布一致的复合特性,功率谱的时频统计近似服从周期的高斯分布,提出用于估计K分布形状参数的海杂波数据长度必须大于调制分量的调制周期。该结论有望提高现有海杂波模型的准确性。
Based on the real sea clutter data, the complex characteristics of the sea clutter in low-echographic radar are studied in depth, and its amplitude distribution characteristics can be well described by the composite K distribution model. The correlation function has the same complex with the amplitude distribution The time-frequency statistics of the power spectrum and the power spectrum approximate the Gaussian distribution of the period, and the length of the sea clutter data used to estimate the K distribution shape parameter must be greater than the modulation period of the modulation component. This conclusion is expected to improve the accuracy of the existing sea clutter model.