Abstract: A novel method termed General Water-Filling is proposed to solve the waveform design problem of a broadband radar for estimating multiple extended targets, which is suitable when the clutter is not negligible. The uncertainty about the target characteristics decreases by maximizing the mutual information between a random extended target and the received signal. Then the General Water-Filling method is employed to the waveform design problem for multiple extended targets identification so as to increase the separability of multiple targets. The results of simulations evaluate the efficiency of the proposed method. Compared to the chirp and Water-Filling signal, our method improves the classification rate by about 3 percent and even performs better in the case of a low SINR.

Key words: waveform design, broadband radar, mutual information, target recognition