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电离层杂波、海杂波以及射频干扰的存在造成高频地波雷达目标检测上的困难。针对高频地波雷达的极化特性和目标在距离-多普勒谱中的扩张特性,先设计一种改进的二维恒虚警检测算法,后将该方法与极化处理方法融合设计一种新的协同检测算法,该检测算法实现了能量域和极化域的协同检测,突破传统极化检测方法计算复杂等问题。高频地波雷达实测数据中的仿真和检测结果表明:在电离层杂波背景中,协同检测算法性能优于恒虚警方法。
The existence of ionospheric clutter, sea clutter and radio frequency interference has caused difficulties in detecting high-frequency ground wave radar targets. Aimed at the polarization characteristics of high frequency ground wave radar and the expansion characteristics of the target in the range-Doppler spectrum, an improved two-dimensional constant false alarm detection algorithm is designed first, then the method is integrated with the polarization processing design A new collaborative detection algorithm is proposed. The detection algorithm realizes the collaborative detection of the energy domain and the polarization domain, and breaks through the complicated calculation of the traditional polarization detection method. The simulation and test results in the high frequency ground wave radar data show that the performance of the cooperative detection algorithm is superior to the CFAR method in the ionospheric clutter background.