Channel Estimation for Orthogonal Time Frequency Space (OTFS) Massive MIMO
arXiv:1903.09441 · doi:10.1109/TSP.2019.2919411
Abstract
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.
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- Channel Acquisition for HF Skywave Massive MIMO-OFDM Communications
- OTFS Channel Estimation and Detection for Channels with Very Large Delay Spread
- Orthogonal Time-Frequency Space Modulation: A Promising Next-Generation Waveform
- Joint Sparsity Pattern Learning Based Channel Estimation for Massive MIMO-OTFS Systems
- Massive MIMO-OFDM Channel Acquisition with Time-Frequency Phase-Shifted Pilots
- Superimposed Channel Estimation in OTFS Modulation Using Compressive Sensing
- Low-Complexity Linear Equalization for OTFS Systems with Rectangular Waveforms
- A New Path Division Multiple Access for the Massive MIMO-OTFS Networks
- On the Effectiveness of OTFS for Joint Radar and Communication
- Channel Estimation and Equalization for CP-OFDM-based OTFS in Fractional Doppler Channels
- Superimposed Pilot-Based OTFS: Will It Work?
- Hybrid Digital-Analog Beamforming and MIMO Radar with OTFS Modulation
- Message Passing Based Structured Sparse Signal Recovery for Estimation of OTFS Channels with Fractional Doppler Shifts
- Receiver Design for OTFS with Fractionally Spaced Sampling Approach
- OTFS Signaling for Uplink NOMA of Heterogeneous Mobility Users
- Uplink-aided High Mobility Downlink Channel Estimation over Massive MIMO-OTFS System
- Transmitter and Receiver Window Designs for Orthogonal Time Frequency Space Modulation
- Low Complexity Channel Estimation for OTFS Modulation with Fractional Delay and Doppler
- Joint Active User Detection and Channel Estimation for Grant-Free NOMA-OTFS in LEO Constellation Internet-of-Things
- Performance Analysis of OTFS Modulation with Receive Antenna Selection
- OTFS Based Receiver Scheme With Multi-Antennas in High-Mobility V2X Systems
- Performance Analysis and Window Design for Channel Estimation of OTFS Modulation