Suppression of the sea clutter in marine radar system

The purpose of this paper is to analyze the radar echo signal data in marine radar system, and we tackle a problem on suppression of the sea clutter on marine radar display by using Wavelet Transform, which gives optimum cut-off frequency with time (distance). Also, we propose Signal to Clutter Ratio (S.C.R.) to evaluate our method and optimum cut-off Wavelet coefficients. The experiment carried out by using X band radar (3 cm wave length) off marine practice center of our school in Awaji Island. In short, the collection of the radar echo signal data reflected from floats, test buoy and a ship carried out in smooth and moderate sea conditions, and targets distance is 0.13, 0.24 and 1.17 nautical miles each. The received signals are processed by 8 bits, 120MHz NO converter and stored in the 8 Mbytes memory by our system.