TArget velocity estimation with distributed MIMO radar using multiple pulse repetition frequencies

In this paper, we propose estimating the velocity of a target using a widely distributed multiple-input multiple-output radar that employs multiple pulse repetition frequencies. In a MIMO radar, it is possible to use different PRFs in different transmitters without added complexity. This allows one to increase the number of pulses for estimation without decreasing the unambiguous range or increasing the time the target needs to be illuminated. We derive a maximum likelihood estimator for the velocity of the target under the assumptions that the scattering is independent and noise spatially and temporally white.