Abstract: The uncertain of target position, fluctuation of sea surface and radar parameters cause difficulties in radar HRRP automatic target recognition. Regarding the issues above, a ship scattering center model is built, the HRRP of ship is simulated, and the sensitivity of HRRP to attitude angle, sea-surface fluctuation, radar bandwidth and windowing is studied. Finally, the simulation results are validated by CST Microwave Studio. The results show that HRRP has a strong sensitivity to attitude angle, whereas within a certain range of angles, there is similarity between HRRPs; the narrower the radar bandwidth, the lower the angle sensitivity; the more calm the sea-surface, the more multipath effect be pronounced; windowing can inhibit the distance side lobes, whereas widen the main lobe, which reduce radar distance resolution.

Key words: High-resolution radar, HRRP, scattering center, sensitivity analysis