Zhou, X;
Zhu, Y;
Xia, W;
Zhang, J;
Wong, KK;
(2024)
Generalized Superimposed Pilot Enabled URLLC in the Finite Blocklength Regime.
In:
2023 IEEE Globecom Workshops, GC Wkshps 2023.
(pp. pp. 1499-1504).
IEEE
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Abstract
Conventional regular pilot (RP) scheme is not appli-cable for ultra-reliable and low-latency communication (URLLC) due to the impact of finite blocklength. In this paper, we propose to use generalized superimposed pilot (GSP) scheme for URLLC transmission in massive multi-input multi-output (mMIMO) systems. Distinguishing from the existing superimposed pilot (SP) scheme, the GSP scheme eliminates mutual interference between the pilot and data, where the data length is optimized, and the data symbols are precoded to spread over the whole transmission block. With the GSP scheme, we first formulate a weighted sum rate maximization problem by jointly optimizing the data length, pilot power, and data power and then derive closed-form results, including optimal data length and achievable rate lower bound with maximum-ratio combining (MRC) detector. Based on the closed-form results, we provide the corresponding iterative algorithm where the problem is transformed into the geometry program format by using log-function approximation method. Finally, the performance of the RP, SP, and GSP schemes are compared through simulation results, which reflect the superiority and robustness of the GSP scheme in URLLC scenarios.
| Type: | Proceedings paper |
|---|---|
| Title: | Generalized Superimposed Pilot Enabled URLLC in the Finite Blocklength Regime |
| Event: | 2023 IEEE Globecom Workshops (GC Wkshps) |
| Dates: | 4 Dec 2023 - 8 Dec 2023 |
| ISBN-13: | 9798350370218 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/GCWkshps58843.2023.10464845 |
| Publisher version: | https://doi.org/10.1109/GCWkshps58843.2023.1046484... |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Geometry, Simulation, Precoding, Symbols, Interference, Ultra reliable low latency communication, Robustness |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10191293 |
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