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Robust Energy-Efficient Analog Beamforming Under Short Packets and Per-Antenna Power Constraints

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Bibliographic Details
Title: Robust Energy-Efficient Analog Beamforming Under Short Packets and Per-Antenna Power Constraints
Authors: Borràs Pino, Jordi, Molina Oliveras, Francesc, López Valcarce, Roberto, Sala Álvarez, José, Vázquez Grau, Gregorio
Source: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Publisher Information: Institute of Electrical and Electronics Engineers (IEEE), 2025.
Publication Year: 2025
Subject Terms: Energy efficiency, Short-packet communication, Analog beamforming, Millimeter-wave communication, Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal, Finite-resolution phase shifters
Description: Designing energy-efficient beamformers is a major challenge to the deployment of battery-powered devices transmitting short data packets at millimeter-wave frequencies. In general, directly maximizing energy efficiency will not meet the stringent reliability requirements of certain Internet-of-Things applications. We focus on designing analog beamformers in a device-to-device setting under short packets, a finite encoder set, and imperfect channel knowledge. To guarantee the required error decoding performance, a two-step procedure is proposed such that beamformers are designed to minimize the power consumption subject to reliability constraints under worst-case channel estimation errors, and then the channel encoder maximizing the energy efficiency is selected. The proposed design enjoys a moderate loss under practical low-resolution phase shifters, and exhibits robustness to inaccurate channel estimators, which is crucial to the tradeoff between energy efficiency and error decoding performance.
Work supported by grants PID2022-136512OB-C21/C22 funded by MCIN/AEI/10.13039/501100011033 and by ERDF “A way of making Europe” (EU), and by Margarita Salas Fellowship.
Document Type: Article
File Description: application/pdf
ISSN: 1558-2248
1536-1276
DOI: 10.1109/twc.2025.3563305
Rights: CC BY
Accession Number: edsair.doi.dedup.....b585579f22472d5da60edb1c55ce94ee
Database: OpenAIRE
Description
Abstract:Designing energy-efficient beamformers is a major challenge to the deployment of battery-powered devices transmitting short data packets at millimeter-wave frequencies. In general, directly maximizing energy efficiency will not meet the stringent reliability requirements of certain Internet-of-Things applications. We focus on designing analog beamformers in a device-to-device setting under short packets, a finite encoder set, and imperfect channel knowledge. To guarantee the required error decoding performance, a two-step procedure is proposed such that beamformers are designed to minimize the power consumption subject to reliability constraints under worst-case channel estimation errors, and then the channel encoder maximizing the energy efficiency is selected. The proposed design enjoys a moderate loss under practical low-resolution phase shifters, and exhibits robustness to inaccurate channel estimators, which is crucial to the tradeoff between energy efficiency and error decoding performance.<br />Work supported by grants PID2022-136512OB-C21/C22 funded by MCIN/AEI/10.13039/501100011033 and by ERDF “A way of making Europe” (EU), and by Margarita Salas Fellowship.
ISSN:15582248
15361276
DOI:10.1109/twc.2025.3563305