This thesis makes use of higher-order statistics in array signal processing of HF-GWR and discusses the application of fourth-order cumulant in estimating arrival-of-direction of currents and targets.

• 为改善雷达低信噪比时的探测性能，提高角度估计精度，并为雷达天线进一步小型化提供理论依据，本文将高阶累积量引入高频地波雷达信号处理，具体研究四阶MUSIC算法在海流探测和目标方向确定中的应用。