A new method for velocity estimation in multicarrier-frequency MIMO radar

The multi-carrier-frequency MIMO radar transmits orthogonal signals of multiple carrier frequencies and capitalizes on the spatial and wave diversity to significantly improve the performance and the flexibility of the radar. A new velocity estimation which can overcome the velocity ambiguity is presented in this paper, using which the LS (least-squared) estimation of true velocity can be obtained from the Doppler shifts corresponding to the different transmit frequencies without transmitting multiple PRF (pulse repetition frequency) signals. Some numerical results are presented to verify the validity of this method.