Transmit Waveform Selection for Polarimetric MIMO Radar Based on Mutual Information Criterion
نویسندگان
چکیده
Transmit waveform selection is essential to improve the performance of a polarimetric multiple-input multiple-output (MIMO) radar system. In this paper, an information theoretic criterion based method is proposed to select the polarization waveforms of the transmit array. The design criterion is to minimize the mutual information (MI) between the radar return signal at two adjacent coherent processing intervals. Based on this criterion, the waveform to be transmitted at next interval is selected according to the return signal at current interval. The criterion guarantees that the MIMO radar can catch more new information about the target at next time. A simple analytic form is attained when all these processes are proper Gaussian processes. An iterative optimization algorithm based on alternating projection is proposed to realize the procedure of waveform selection. The algorithm greatly reduces the amount of computation. Numerical examples are conducted to illustrate the effectiveness of the proposed method. Copyright © 2013 IFSA.
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