Beam Structured Channel Estimation for HF Skywave Massive MIMO-OFDM Communications
Date
2024-08-14
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE Transactions on Wireless Communications
Abstract
In this paper, we investigate high frequency (HF) skywave massive multiple-input multiple-output (MIMO) communications with orthogonal frequency division multiplexing (OFDM) modulation. Based on the triple-beam (TB) based channel model and the channel sparsity in the TB domain, we propose a beam structured channel estimation (BSCE) approach. Specifically, we show that the space-frequency-time (SFT) domain estimator design for each TB domain channel element can be transformed into that of a low-dimensional TB domain estimator and the resulting SFT domain estimator is beam structured. We also present a method to select the TBs used for BSCE. Then we generalize the proposed BSCE by introducing window functions and a turbo principle to achieve a superior trade-off between complexity and performance. Furthermore, we present a low-complexity design and implementation of BSCE by exploiting the characteristics of the TB matrix. Simulation results validate the proposed theory and methods.
Description
This article was originally published in IEEE Transactions on Wireless Communications. The version of record is available at: https://doi.org/10.1109/TWC.2024.3439725
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This article will be embargoed until 08/14/2026.
Keywords
Massive MIMO-OFDM, HF skywave communications, beam structured channel estimation, low-complexity implementation
Citation
D. Shi et al., "Beam Structured Channel Estimation for HF Skywave Massive MIMO-OFDM Communications," in IEEE Transactions on Wireless Communications, doi: 10.1109/TWC.2024.3439725.