紧凑型地波超视距雷达海杂波区目标检测影响因素研究

针对紧凑型地波超视距雷达海杂波周边及区域内目标难以检测问题，通过相关影响因素的理论及实测数据统计分析，对系统信号积累时间选取、目标航行状态与海杂波区的关联以及实测数据的联合域展开研究,分析结果为雷达相干积累时间的选取制定了取值范围。研究表明海杂波区内远距离非机动目标潜在驻留时间超过雷达积累时间，且导致的回波多普勒变化量有限，但海杂波和目标在时空及极化域具有相对较大的差异，可作为海杂波区目标检测的重要依据。

Analysis of the factors influencing target detection in sea clutter areathrough a compact high frequency surface wave radar

In this study, theoretical and statistical analysis of relevant influencing factors, including the signal coherent accumulation time, connection between the vessel navigation state and sea clutter area and the joint domain study of measured data, are conducted to facilitate the detection of target vessels from the sea clutter of a compact high frequency surface wave radar. The obtained results provide a range of signal coherent integration time. The results show that the potential dwell time of long-distance non-maneuvering target in sea clutter is over the signal coherent integration time. Furthermore, the Doppler variation induced by the non-maneuvering targets in sea clutter is limited. However, the sea clutter and non-maneuvering targets exhibit major differences in the space-time and polarization domains, which can be considered as an important criteria for target detection from sea clutter.