Optimising chaotic phase coded waveforms for MIMO radar

To avoid mutual interferences and detection confusion, orthogonal waveforms are usually employed for multiple-input multiple-output (MIMO) radar. In this paper, we apply chaos to design orthogonal waveforms for MIMO radar. Chaotic phase coded waveforms are generated, which are further optimised for obtaining good correlation performance of low sidelobe level. A sidelobe suppression method with complementary transmitting is introduced. The clonal selection algorithm is imposed to obtain the corresponding complementary coding waveforms. Correlation performance are compared with transmitting single chaotic phase coded signals and shown to be superior. Simulations based on bi-phase coded signals verify this method.