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...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-03-01
|
| Series: | Entropy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1099-4300/24/4/448 |
| _version_ | 1797434799803072512 |
|---|---|
| author | Zeliang Ou Xiaofeng Liu Hongwen Yang |
| author_facet | Zeliang Ou Xiaofeng Liu Hongwen Yang |
| author_sort | Zeliang Ou |
| collection | DOAJ |
| 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>1</mn><mo>/</mo><mi>K</mi></mrow></semantics></math></inline-formula> of the Nyquist rate, where <i>K</i> 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. |
| first_indexed | 2024-03-09T10:37:59Z |
| format | Article |
| id | doaj.art-b62047d7e59a437eb0d9307a3cfbab14 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-03-09T10:37:59Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-b62047d7e59a437eb0d9307a3cfbab142023-12-01T20:49:51ZengMDPI AGEntropy1099-43002022-03-0124444810.3390/e24040448A Low Sampling Rate Receiver Design for Multi-Antenna Multi-User OFDM SystemsZeliang Ou0Xiaofeng Liu1Hongwen Yang2School of Wireless Communication Center, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaChina Academy of Information and Communications Technology, Beijing 100191, ChinaSchool of Wireless Communication Center, Beijing University of Posts and Telecommunications, Beijing 100876, ChinaThe 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>1</mn><mo>/</mo><mi>K</mi></mrow></semantics></math></inline-formula> of the Nyquist rate, where <i>K</i> 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.https://www.mdpi.com/1099-4300/24/4/448low sampling ratezero-forcing precodingOFDM system |
| spellingShingle | Zeliang Ou Xiaofeng Liu Hongwen Yang A Low Sampling Rate Receiver Design for Multi-Antenna Multi-User OFDM Systems Entropy low sampling rate zero-forcing precoding OFDM system |
| 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 | low sampling rate zero-forcing precoding OFDM system |
| url | https://www.mdpi.com/1099-4300/24/4/448 |
| work_keys_str_mv | AT zeliangou alowsamplingratereceiverdesignformultiantennamultiuserofdmsystems AT xiaofengliu alowsamplingratereceiverdesignformultiantennamultiuserofdmsystems AT hongwenyang alowsamplingratereceiverdesignformultiantennamultiuserofdmsystems AT zeliangou lowsamplingratereceiverdesignformultiantennamultiuserofdmsystems AT xiaofengliu lowsamplingratereceiverdesignformultiantennamultiuserofdmsystems AT hongwenyang lowsamplingratereceiverdesignformultiantennamultiuserofdmsystems |