Novel MIMO method for high mobility environments using Schubert cell decomposition

Abstract

A noncoherent multiple-input multiple-output (MIMO) method that is effective in high mobility environments is proposed based on Grassmannian MIMO signaling, which is a well-known noncoherent MIMO scheme. The proposed method leverages the property that the Grassmannian can be decomposed into non-overlapping parts called Schubert cells, and assigns information to the Schubert cells for transmission. Furthermore, a multi-resolution MIMO system that incorporates the proposed method is developed, and its error performance is evaluated. The results show that the information assigned to each Schubert cell is correctly decoded even at the normalized Doppler frequency f_dT_s=0.1 in the multi-resolution MIMO system.