Abstract:

A waveform diversity of multiple-input multiple-output (MIMO) radar possesses flexible transmit beampattern synthesis. A fast wideband transmit beampattern synthesis algorithm based on frequency invariant beamformer (FIB) is proposed, the spectrum of wideband MIMO radar transmit waveforms is computed by the FIB, then an alternating matrix fitting method is used to design unimodular sequences. The proposed method does not require matrix inversion operation and has a much lower computation complexity compared with wideband beampattern formation via iterative techniques (WBFIT) due to the significant reduction of iteration order. The numerical results indicate that the proposed method performs similarly as WBFIT, but with only 10% of the computational costs.