Abstract
We consider the uplink of an orthogonal time frequency space (OTFS)-based multiuser multiple-input multiple output (MU-MIMO) system. For this setup, we consider, for the first time ever, the more practical rectangular pulse-shaped functions along with the fractional delay and Doppler shift. We first provide the exact OTFS-based input-output relationship. Subsequently, the orthogonal frequency division multiplexing (OFDM)-based OTFS input-output approximation is derived by reconstructing the continuous time domain signal via a sinc function. Based on these two results, an important performance metric, namely, the pairwise error probability (PEP) with maximum-likelihood (ML) and nearest-neighbor (NN) decoding rules, is analyzed. A series of interesting insights are obtained from the analysis: i) for our system setting, the effective channel matrix is not doubly-block circulant or sparse structured anymore, while the OFDM-based approximation result consists of a block-Toeplitz with Toeplitz block (BTTB) structured matrix; ii) the practical rectangular pulses suffer from a significant performance degradation.
Original language | English |
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Title of host publication | Proceedings of the IEEE International Conference on Communications, ICC 2023 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Number of pages | 7 |
ISBN (Electronic) | 9798350333077 |
ISBN (Print) | 9798350333084 |
DOIs | |
Publication status | Published - 23 Oct 2023 |
Event | IEEE International Conference on Communications 2023 - Rome, Italy Duration: 28 May 2023 → 01 Jun 2023 https://icc2023.ieee-icc.org/ |
Publication series
Name | IEEE International Conference on Communications: Proceedings |
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ISSN (Print) | 1550-3607 |
ISSN (Electronic) | 1938-1883 |
Conference
Conference | IEEE International Conference on Communications 2023 |
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Abbreviated title | IEEE ICC 2023 |
Country/Territory | Italy |
City | Rome |
Period | 28/05/2023 → 01/06/2023 |
Internet address |