Joint DFT and Spacetime Coding for MU-OFDM in Power-Constrained Optical Wireless Communication Systems
The application of DFT precoding in mitigating peak-to-average power ratio (PAPR) issues in optical wireless communication systems under power constraints is well established. However, the channel spatial diversity for multiusers needs to be considered. This paper proposes a joint DFT and spacetime...
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MDPI AG
2024-12-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/12/1/11 |
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| author | Dianbin Lian Yan Gao Jie Lian Yong Li |
| author_facet | Dianbin Lian Yan Gao Jie Lian Yong Li |
| author_sort | Dianbin Lian |
| collection | DOAJ |
| description | The application of DFT precoding in mitigating peak-to-average power ratio (PAPR) issues in optical wireless communication systems under power constraints is well established. However, the channel spatial diversity for multiusers needs to be considered. This paper proposes a joint DFT and spacetime precoding technique to support multiple users and mitigate the PAPR for optical wireless communication systems when OFDM modulation is used. In our study, we introduce the weighted Bussgang theorem as an alternative method for evaluating the communication performance of hard-clipped systems due to the transmitted power constraint. Our numerical results demonstrate the effectiveness of this approach in analyzing SNR and BER performance. |
| format | Article |
| id | doaj-art-b3ed5f23e96d42e6bdd1cdb1d846cd2b |
| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-b3ed5f23e96d42e6bdd1cdb1d846cd2b2025-01-24T13:46:10ZengMDPI AGPhotonics2304-67322024-12-011211110.3390/photonics12010011Joint DFT and Spacetime Coding for MU-OFDM in Power-Constrained Optical Wireless Communication SystemsDianbin Lian0Yan Gao1Jie Lian2Yong Li3School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710129, ChinaSchool of Electronics and Information, Northwestern Polytechnical University, Xi’an 710129, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Electronics and Information, Northwestern Polytechnical University, Xi’an 710129, ChinaThe application of DFT precoding in mitigating peak-to-average power ratio (PAPR) issues in optical wireless communication systems under power constraints is well established. However, the channel spatial diversity for multiusers needs to be considered. This paper proposes a joint DFT and spacetime precoding technique to support multiple users and mitigate the PAPR for optical wireless communication systems when OFDM modulation is used. In our study, we introduce the weighted Bussgang theorem as an alternative method for evaluating the communication performance of hard-clipped systems due to the transmitted power constraint. Our numerical results demonstrate the effectiveness of this approach in analyzing SNR and BER performance.https://www.mdpi.com/2304-6732/12/1/11OFDMPAPRDFT precodingoptical wireless communicationspower constraintspacetime coding |
| spellingShingle | Dianbin Lian Yan Gao Jie Lian Yong Li Joint DFT and Spacetime Coding for MU-OFDM in Power-Constrained Optical Wireless Communication Systems Photonics OFDM PAPR DFT precoding optical wireless communications power constraint spacetime coding |
| title | Joint DFT and Spacetime Coding for MU-OFDM in Power-Constrained Optical Wireless Communication Systems |
| title_full | Joint DFT and Spacetime Coding for MU-OFDM in Power-Constrained Optical Wireless Communication Systems |
| title_fullStr | Joint DFT and Spacetime Coding for MU-OFDM in Power-Constrained Optical Wireless Communication Systems |
| title_full_unstemmed | Joint DFT and Spacetime Coding for MU-OFDM in Power-Constrained Optical Wireless Communication Systems |
| title_short | Joint DFT and Spacetime Coding for MU-OFDM in Power-Constrained Optical Wireless Communication Systems |
| title_sort | joint dft and spacetime coding for mu ofdm in power constrained optical wireless communication systems |
| topic | OFDM PAPR DFT precoding optical wireless communications power constraint spacetime coding |
| url | https://www.mdpi.com/2304-6732/12/1/11 |
| work_keys_str_mv | AT dianbinlian jointdftandspacetimecodingformuofdminpowerconstrainedopticalwirelesscommunicationsystems AT yangao jointdftandspacetimecodingformuofdminpowerconstrainedopticalwirelesscommunicationsystems AT jielian jointdftandspacetimecodingformuofdminpowerconstrainedopticalwirelesscommunicationsystems AT yongli jointdftandspacetimecodingformuofdminpowerconstrainedopticalwirelesscommunicationsystems |