Constrained-MUSIC算法在高频地波舰载超视距雷达中的应用

在舰载超视距雷达检测时 ,由于载舰运动所造成的一阶海波谱展宽 ,遮蔽了舰船目标 ,造成目标检测的困难 ,采用空域超分辨处理 ,将目标与展宽的一阶海波谱分开是非常可行的。Constrained -MUSIC算法的分辨性能不受相干目标的影响 ,且在舰载超视距雷达中 ,由于展宽的一阶海杂波谱相应的空间方位是可计算出的 ,Con strained-MUSIC算法可以充分利用这一已知的方位信息 ,将与一阶海浪谱同频 ,但处于不同空间方位的船目标分辨出来 ,有效地实现了高频地波舰载超视距雷达检测下的空域超分辨处理 ,对在舰载雷达情形下有效地进行目标检测提供了一个良好的距离 -速度 -方位分辨后的三维检测背景平台

Application of Constrained-MUSIC Algorithm in Shipborne HFOTH Radar

In shipborne radar, the widening first-order sea clutter because of the carrier's movement obscures the ship target and causes the difficulty of detecting target, by spatial super resolution, it is feasible to divide the target and broadened first-order sea echo spectrum. The resolution ability of constrained-MUSIC is not degraded when coherent targets exist and in shipborne HFOTH radar, because the spatial azimuth angle of first-order sea echo can be computed, constrained-MUSIC algorithm can make full use of the known azimuth information to resolute the vessel target, which has the same frequency as the first-order sea clutter but different azimuth angle, so as to realize the spatial high-resolution in HF OTH radar and the three-dimension detection background platform after range-velocity-azimuth resolution is given.