海杂波下距离扩展目标的最优二进制检测

研究了低擦地角下高分辨雷达对静止或慢速运动的距离扩展目标的最优二进制检测问题。采用K分布模型描述低擦地角下海杂波的统计分布，采用Rayleigh快起伏模型描述扩展目标距离像的幅度分布，详细分析了扩展目标二进制检测器参数与扩展目标径向长度、杂波形状参数之间的关系，最终得到最优二进制检测器的参数选择准则和经验公式，对二进制检测器的实际应用具有较强的指导意义。理论和实测杂波数据证明了最优二进制检测器的有效性。

Optimal binary detection strategy for range-extended targets in sea clutter

Optimal binary detection strategy for range extended targets is presented in the background of K-distribution sea clutter. A K-distribution model is used to characterize the sea clutter from low grazing angle, a Rayleigh stochastic model is adopted to describe the amplitude distribution of range extended targets. The performance of binary detector for various range lengths of targets and the shape parameters of clutter are analyzed. Finally, the usual principles and experiential formula of optimal parameters choice are deduced, thus giving a direction for the application of the binary detector. The result of Mote Carlo test proves the efficiency of the optimal binary detection strategy.