Abstract:

In electronic countermeasure, reconnaissance and signal sorting of colocated MIMO radar is a difficult point. The blind source separation algorithm based on noncircular complex fast ICA(NC Fast ICA) is utilized to sort MIMO radar signals. In order to satisfy the application conditions of the BSS algorithm, a reconnaissance method for collecting radar signals in multiple positions with different angles of view is proposed to obtain and a separable
full rank mixing matrix. Several typical orthogonal waveforms such as phase coded signals and discrete frequency coded waveforms are used for separation. Simulation results show that a separation performance of -14dB can be achieved under the condition of evenly angle spaced sampling and a signal to noise ratio of 10dB regardless of the amplitude fluctuations. The correlation comparison and time frequency analysis of separated waveforms also demonstrate the validity of proposed method.

Key words: MIMO radar, Electronic reconnaissance, Signal sorting, Blind source separation, Orthogonal waveform, Independent component analysis(ICA)