In order to obtain a reliable estimation of the number of the incident signals when the signal-to-noise(SNR) is low or the sources are spatially adjacent in complex electromagnetic environment,a pseudo-data matrix capable of separating cyclic statistical coherent signals is founded via temporal averaging,and the information criterion is also brought in to propose a novel source enumeration method.

In this paper, five issues commonly concerned are discussed, they are: assessment of clustering results, estimation of total number of clusters, data preparation, measures of data proximity and outlier handling.

This dissertation is devoted to the study of several aspects of the wideband signal processing, concerning wideband signals number estimation, DOA estimation, array noise suppression, array signals fast processing, infl.