Impulse and aperture synthesis in multi-carrier-frequency MIMO radar

The multi-carrier-frequency MIMO radar uses a sparse-array to transmit the FMCW signals of multiple carrier frequencies, and an array to receive the echoes. The signal model of multi- carrier-frequency MIMO radar is analyzed in this paper. A new method for impulse and aperture synthesis is presented. Every range cell after coherent integration is divided equally into N_n parts, which is weighted by the coherent integration results. As a result, the range grating lobes are suppressed greatly and the aperture of transmitting and receiving array is utilized adequately. The simulation results indicate the validity of the method presented in this paper.