3D-IPRDSOMP Algorithm for Channel Estimation in Massive MIMO with OTFS Modulation

In this paper, we propose a channel estimation method for massive multi-input multi-output (MIMO) with orthogonal time frequency space (OTFS) modulation. Our aims to reduce inter-symbol interference (ISI) when the subtraction of two delay paths is smaller than resolution system. We 3D inner product proportion difference structured matching pursuit (3D-IPRDSOMP) algorithm that combines characteristics sparse channels. With knowledge number dominant paths, use local optimums match distinguishable backtracking. The approximates similar and indistinguishable as identical ones. estimated iteration’s termination condition increases estimation’s accuracy. Simulation results show better performance traditional under different conditions.