Simulation-of-CW-radar-wave-and-2DFFT-for-Velocity-detection Simulation of CW radar wave and 2D FFT for Velocity detection 2DFFT for Velocity Ddetection. Author : Lin Junyang @ 2021. A simulation of CW wave, 2DFFT for velocity detection. Velocity Result of 2DFFT: maxima indexs at the 2 Dimensions. 1st Dimension - coarse velocity, 2nd Dimension - fine velocity.