DOI: 10.3724/SP.J.1146.2013.00311

Journal of Electronics & Information Technology (电子与信息学报) 2013/35:12 PP.2809-2814

An Orthogonal Waveform Separation Method Based on Clean Processing in MIMO-SAR

Because the real orthogonal waveforms occupying the same frequency band may not realistically be found, the imaging quality is degraded by the cross-correlation noise caused by coupling among these waveforms for MIMO-SAR system that transmits the same frequency coded orthogonal waveforms. To address the above problem, a novel orthogonal waveform separation method is proposed based on Clean processing and is used to obtain the echoes from each waveform. Then, its performance is discussed. Finally, the numerical experiments are provided to demonstrate the effectiveness of the proposed method to suppress the cross-correlation noise among orthogonal waveforms for point scatterer and verify that its imaging performance approaches that of conventional SAR with single transmitting waveform.

Key words:MIMO-SAR,Orthogonal waveforms,Cross-correlation noise,Clean processing

ReleaseDate:2014-07-21 17:01:13