Tensor-Based Channel Estimation for Millimeter Wave MIMO-OFDM with Dual-Wideband Effects

Yuxing Lin, Shi Jin, Michalis Matthaiou, Xiaohu You

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Abstract

We consider the channel estimation problem in millimeter wave (mmWave) multiple-input multipleoutput orthogonal frequency division multiplexing (MIMO-OFDM) systems with hybrid analog-digital architectures. Leveraging the spatial- and frequency-wideband (dual-wideband) effects in massive MIMO scenarios, we derive a spatial-frequency channel model with dual-wideband effects that incorporates the multipath parameters, i.e., time delay, complex gain, angle of departure/arrival. We adopt a successive beam training scheme and formulate the training OFDM signal as a third-order low-rank tensor fitting a canonical polyadic (CP) model with factor matrices containing the channel parameters. Exploiting the Vandermonde nature of factor matrices, we propose a structured CP decomposition-based channel estimation strategy aided by the spatial smoothing method, where two dedicated algorithms with particular tensor modeling and parameter recovery operations are developed. The proposed scheme leverages standard linear algebra, and, hence, avoids the random initialization problem and iterative procedure. An analysis of the uniqueness condition of CP decomposition is also pursued. Simulation results indicate that the proposed strategy achieves enhanced estimation performance, which outperforms the traditional approaches in terms of accuracy, robustness and complexity
Original languageEnglish
JournalIEEE Transactions on Communications
Early online date17 Mar 2020
DOIs
Publication statusEarly online date - 17 Mar 2020

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