MIMO Radar Performance in Clutter: Limitations Imposed by Bounds on the Volume and Height Distributions for the MIMO Radar Ambiguity Function

In Multiple-Input Multiple-Output (MIMO) radar, the efficiency of target detection in clutter that is distributed over a certain range bin - Doppler frequency region depends on the sidelobe level of the waveforms' auto- and cross-ambiguity functions within this region. The authors introduce the MIMO ambiguity function as the sum of all auto- and cross-ambiguity functions of the K MIMO radar waveforms, with the integral of this function over some range - Doppler region serving as a measure of the orthogonality (separability) of the waveforms within this region of interest.