DeepAI AI Chat
Log In Sign Up

Channel Estimation for Orthogonal Time Frequency Space (OTFS) Massive MIMO

by   Wenqian Shen, et al.
The University of Texas at Austin
Tsinghua University
Southwest Jiaotong University
Beijing Institute of Technology

Orthogonal time frequency space (OTFS) modulation outperforms orthogonal frequency division multiplexing (OFDM) in high-mobility scenarios. One challenge for OTFS massive MIMO is downlink channel estimation due to the large number of base station antennas. In this paper, we propose a 3D structured orthogonal matching pursuit algorithm based channel estimation technique to solve this problem. First, we show that the OTFS MIMO channel exhibits 3D structured sparsity: normal sparsity along the delay dimension, block sparsity along the Doppler dimension, and burst sparsity along the angle dimension. Based on the 3D structured channel sparsity, we then formulate the downlink channel estimation problem as a sparse signal recovery problem. Simulation results show that the proposed algorithm can achieve accurate channel state information with low pilot overhead.


page 2

page 3

page 4

page 6

page 8

page 9

page 10

page 12


CS-Based CSIT Estimation for Downlink Pilot Decontamination in Multi-Cell FDD Massive MIMO

Efficient channel state information at transmitter (CSIT) for frequency ...

Sensing Aided OTFS Channel Estimation for Massive MIMO Systems

Orthogonal time frequency space (OTFS) modulation has the potential to e...

On the Doppler Squint Effect in OTFS Systems over Doubly-Dispersive Channels: Modeling and Evaluation

Extensive work has demonstrated the excellent performance of orthogonal ...

Low Complexity Precoding and Detection in Multi-user Massive MIMO OTFS Downlink

We consider the problem of degradation in performance of multi-carrier m...

MIMO-OFDM Joint Radar-Communications: Is ICI Friend or Foe?

Inter-carrier interference (ICI) poses a significant challenge for OFDM ...

Massive-MIMO Iterative Channel Estimation and Decoding (MICED) in the Uplink

Massive MIMO uses a large number of antennas to increase the spectral ef...