基于分数阶模糊函数延时对消的海面运动弱目标检测

Weak Target Detection Based on Time-Delay Fractional Ambiguity in Sea Clutter

摘要:

研究了分数阶模糊函数的时移特性,根据此特性提出了基于分数阶模糊函数延时对消的海面运动弱目标检测方法。通过对IPIX实测数据验证表明,该方法在增加目标与杂波FRFT峰值差、提高信杂比以及检测概率等方面都明显优于仅对回波作分数阶模糊函数。设置适当的恒虚警检测门限,该检测方法能够达到更好的检测效果。

Abstract:

The time shift characteristic of the signal which had double acceleration in Fractional Ambiguity was researched. Based on this characteristic, a new method based on difference of Fractional Ambiguity model for low speed moving target detection in sea clutter was proposed. Experiment using the IPIX data showed that the method had remarkably advantage in increasing the signal-clutter, FRFT peak value difference and enhancing the SCR. Setting right detection threshold, the method could detect the target better.