Abstract: We present in this paper a new number-of-sources-detecting algorithm for non-circular sources. In the proposed method, due to the non-circularity characteristics of the sources, we can employ the conjugate measurements and unitary transformation in the covariance matrix, and as a result the sensors and snapshots are doubled. It is shown that the new method can handle more sources than the MDL, and that it has a better angular resolution. In addition, the rate of convergence of the proposed method is faster than that of conventional algorithms.

Key words: detection of signals, MDL, array processing