arXiv:2610.37084v1 Announce Type: new Abstract: This work investigates the velocity ambiguity function in the radiative near-field of a uniform linear antenna array. First, the general ambiguity function is formulated and the velocity cross-section at a target position is considered. The velocity vector is decomposed into radial and tangential components, which are analyzed separately. Next, the closed-form approximations for the velocity ambiguity function are derived and shown to be accurate despite relying on far-field approximations. The results show that the near-field regime does not improve radial velocity estimation, but enables estimation of the tangential velocity. Finally, the velocity ambiguity functions and the achievable resolution are analyzed for different array configurations. For tangential velocity estimation, MIMO and a collection of SISO radars offer improved ambiguity function and resolution as compared to the SIMO/MISO configuration.