"Sampling and reconstruction of multiple-input multiple-output channels"
Lee, Dae GwanWe study sampling and reconstruction of slowly time-varying multiple-input multiple-output (MIMO) channels where each subchannel's spreading functions is supported on a set of limited size. This work is based on recent results in the single-input single-output (SISO) setting, in particular, at the center of this work is the extension of the SISO dual tiling condition to the MIMO setting. Building upon the MIMO dual tiling condition, we derive reconstruction formulas for the channel operator's Kohn-Nirenberg symbol in closed form and discuss the problem of identifying MIMO channel operators where only restrictions in size, but not in location and geometry, of the subchannel spreading supports are known. Joint work with Goetz Pfander and Volker Pohl.