Estimation of blind source number in communication reconnaissance

For blind signal processing in communication reconnaissance, it is a key step to estimate the sources number, which greatly influences the performance of subsequent processing. In this paper, the source estimation method based on power spectral density (PSD) is successfully adopted in blind communication reconnaissance signal separation. Meanwhile, according to the characteristic of this specific kind of signal, improvement of this method is put forward for more efficient application in this field. At last, the effectiveness of the modification is verified by simulation and the weakening effect of the noise influence on source estimation is proved by contrastive analysis.