An effective method of anti-impulsive-disturbance for ship-target detection in HF radar

This paper presents an effective method against impulsive disturbances resulting in the spectral base wholly rising, which may cover the spectra of ship target returns. The first-order sea clutter in the time domain is always dominant in amplitude and the impulsive disturbances would usually be covered. In order to eliminate impulsive disturbances, the first-order sea clutter is first cancelled in the frequency domain and then those impulsive disturbances which are dominant in amplitude in the time domain can be eliminated. The remainder is basically the weaker background noise and ship target echoes and signal detection becomes possible, especially for weaker targets.