This document proposes a low complexity algorithm for jointly estimating the reflection coefficient, spatial location, and Doppler shift of a target for MIMO radar systems. It splits the estimation problem into two parts. The first part estimates the reflection coefficient in closed form. The second part jointly estimates the spatial location and Doppler shift using a 2D FFT approach. This allows significantly lower computational complexity compared to maximum likelihood estimation. Simulation results show the proposed estimator achieves the Cramér-Rao lower bound, providing optimal performance with low complexity.