Suppressing instantaneous interference of high frequency ground wave radar

Over the past two decades,significant advances have been made in the use of high frequency ground wave (HFGW) radar for remote sensing in an ocean environment. Because the high frequency band is a hostile electromagnetic environment,all kinds of instantaneous interferences may badly affect HFGW radar′s performance. Through analyzing the instantaneous interference′s singularity characteristic showed in range-time sequence,this paper presents wavelet transform to detect instantaneous interference in range-time sequence after using a Hankel rank reduction method [7] to suppress sea clutter, and a method to resume Doppler signal based on LSL adaptive prediction model. Experiments show that the anti-instantaneous interference ability of HFGW radar is enhanced via taking advantage of this method.