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A Low Sampling Rate Receiver Design for Multi-Antenna Multi-User OFDM Systems
The future 6G mobile communication network will support an unprecedented amount of Internet of Things (IoT) devices, which will boost the demand for low cost terminals under the principle of green communication. One of the critical issues for low cost terminals is the sampling rate of analog-to-digi...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9029444/ https://www.ncbi.nlm.nih.gov/pubmed/35455111 http://dx.doi.org/10.3390/e24040448 |
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author | Ou, Zeliang Liu, Xiaofeng Yang, Hongwen |
author_facet | Ou, Zeliang Liu, Xiaofeng Yang, Hongwen |
author_sort | Ou, Zeliang |
collection | PubMed |
description | The future 6G mobile communication network will support an unprecedented amount of Internet of Things (IoT) devices, which will boost the demand for low cost terminals under the principle of green communication. One of the critical issues for low cost terminals is the sampling rate of analog-to-digital converters (ADCs) at the receivers. A high sampling rate of the ADC gives rise to a high energy consumption and high hardware cost for the terminal. In the conventional multi-user OFDM systems, all users have to sample the received signal with a sampling rate that is larger than or equal to the Nyquist rate, despite only a small fraction of the bandwidth (number of subcarriers) is allocated to each user. This paper proposes a low sampling rate receiver design for multi-antenna multi-user OFDM systems. With the aid of zero-forcing precoding, the sampling rate of the receiver can be reduced to [Formula: see text] of the Nyquist rate, where K is the number of users. The simulation results show that with a significant reduction in sampling rate, performance loss is insignificant and acceptable in terms of bit error rate, mutual information and peak-to-average power ratio. |
format | Online Article Text |
id | pubmed-9029444 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-90294442022-04-23 A Low Sampling Rate Receiver Design for Multi-Antenna Multi-User OFDM Systems Ou, Zeliang Liu, Xiaofeng Yang, Hongwen Entropy (Basel) Article The future 6G mobile communication network will support an unprecedented amount of Internet of Things (IoT) devices, which will boost the demand for low cost terminals under the principle of green communication. One of the critical issues for low cost terminals is the sampling rate of analog-to-digital converters (ADCs) at the receivers. A high sampling rate of the ADC gives rise to a high energy consumption and high hardware cost for the terminal. In the conventional multi-user OFDM systems, all users have to sample the received signal with a sampling rate that is larger than or equal to the Nyquist rate, despite only a small fraction of the bandwidth (number of subcarriers) is allocated to each user. This paper proposes a low sampling rate receiver design for multi-antenna multi-user OFDM systems. With the aid of zero-forcing precoding, the sampling rate of the receiver can be reduced to [Formula: see text] of the Nyquist rate, where K is the number of users. The simulation results show that with a significant reduction in sampling rate, performance loss is insignificant and acceptable in terms of bit error rate, mutual information and peak-to-average power ratio. MDPI 2022-03-24 /pmc/articles/PMC9029444/ /pubmed/35455111 http://dx.doi.org/10.3390/e24040448 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ou, Zeliang Liu, Xiaofeng Yang, Hongwen A Low Sampling Rate Receiver Design for Multi-Antenna Multi-User OFDM Systems |
title | A Low Sampling Rate Receiver Design for Multi-Antenna Multi-User OFDM Systems |
title_full | A Low Sampling Rate Receiver Design for Multi-Antenna Multi-User OFDM Systems |
title_fullStr | A Low Sampling Rate Receiver Design for Multi-Antenna Multi-User OFDM Systems |
title_full_unstemmed | A Low Sampling Rate Receiver Design for Multi-Antenna Multi-User OFDM Systems |
title_short | A Low Sampling Rate Receiver Design for Multi-Antenna Multi-User OFDM Systems |
title_sort | low sampling rate receiver design for multi-antenna multi-user ofdm systems |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9029444/ https://www.ncbi.nlm.nih.gov/pubmed/35455111 http://dx.doi.org/10.3390/e24040448 |
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