Design and performance of MIMO radar signal based on Lorenz chaos

Abstract

The orthogonal performance of the transmitted signal is the key to realize the multiple input multiple output (MIMO) radar. Discrete frequency coding waveform (DFCW) is a common MIMO radar signal, but it is not conducive to weak target detection because of its high autocorrelation sidelobe peak (ASP), which is about 0.21 or -13.6 dB. Lorenz chaotic system is used to construct the discrete frequency coding sequence, and the fixed frequency pulses is replaced by linear frequency modulated (LFM) pulses, which makes the autocorrelation performance significantly improved compared with the DFCW. Finally, the inter-pulse diversity method is used to improve the anti-interception ability and the anti-interference ability, and lower the ASP after multi-pulse compression.