Research on Maximum Likelihood Decoding Algorithm and Channel Characteristics Optimization for 4FSK Ultraviolet Communication System Based on Poisson Distribution
This study focuses on a 4FSK-modulated ultraviolet (UV) communication system, introducing an innovative symbol-level maximum likelihood decoding approach based on Poisson statistics. A forward error correction (FEC) coding mechanism is integrated to enhance system robustness. Through Monte Carlo sim...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-04-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/12/5/419 |
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| _version_ | 1849326835442122752 |
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| author | Li Kuang Yingkai Zhao Kangjian Li Xingfa Wang Linyi Li Huishi Zhu Weijie Zhang Jianguo Liu |
| author_facet | Li Kuang Yingkai Zhao Kangjian Li Xingfa Wang Linyi Li Huishi Zhu Weijie Zhang Jianguo Liu |
| author_sort | Li Kuang |
| collection | DOAJ |
| description | This study focuses on a 4FSK-modulated ultraviolet (UV) communication system, introducing an innovative symbol-level maximum likelihood decoding approach based on Poisson statistics. A forward error correction (FEC) coding mechanism is integrated to enhance system robustness. Through Monte Carlo simulations, the proposed decoding scheme and the error correction performances of Reed–Solomon (RS) and Low-Density Parity-Check (LDPC) codes are evaluated in UV channels. Both RS and LDPC codes significantly improve the Bit Error Rate (BER), with LDPC codes achieving superior gains under low SNR conditions. Hardware implementation and field tests validate the decoding algorithm and LDPC-optimized 4FSK system. Under non-line-of-sight (NLOS) conditions (10–45° transmit elevation angle), stable 60 m communication with BER < 10<sup>−3</sup> is achieved. In line-of-sight (LOS) scenarios, the system demonstrates 900 m range with BER < 10<sup>−3</sup>, highlighting practical applicability in challenging atmospheric environments. |
| format | Article |
| id | doaj-art-763f10fcf4df4ff88f0408df320c74bb |
| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-763f10fcf4df4ff88f0408df320c74bb2025-08-20T03:48:02ZengMDPI AGPhotonics2304-67322025-04-0112541910.3390/photonics12050419Research on Maximum Likelihood Decoding Algorithm and Channel Characteristics Optimization for 4FSK Ultraviolet Communication System Based on Poisson DistributionLi Kuang0Yingkai Zhao1Kangjian Li2Xingfa Wang3Linyi Li4Huishi Zhu5Weijie Zhang6Jianguo Liu7Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaThis study focuses on a 4FSK-modulated ultraviolet (UV) communication system, introducing an innovative symbol-level maximum likelihood decoding approach based on Poisson statistics. A forward error correction (FEC) coding mechanism is integrated to enhance system robustness. Through Monte Carlo simulations, the proposed decoding scheme and the error correction performances of Reed–Solomon (RS) and Low-Density Parity-Check (LDPC) codes are evaluated in UV channels. Both RS and LDPC codes significantly improve the Bit Error Rate (BER), with LDPC codes achieving superior gains under low SNR conditions. Hardware implementation and field tests validate the decoding algorithm and LDPC-optimized 4FSK system. Under non-line-of-sight (NLOS) conditions (10–45° transmit elevation angle), stable 60 m communication with BER < 10<sup>−3</sup> is achieved. In line-of-sight (LOS) scenarios, the system demonstrates 900 m range with BER < 10<sup>−3</sup>, highlighting practical applicability in challenging atmospheric environments.https://www.mdpi.com/2304-6732/12/5/419UV communication4FSKLDPCPoisson maximum likelihood decoding |
| spellingShingle | Li Kuang Yingkai Zhao Kangjian Li Xingfa Wang Linyi Li Huishi Zhu Weijie Zhang Jianguo Liu Research on Maximum Likelihood Decoding Algorithm and Channel Characteristics Optimization for 4FSK Ultraviolet Communication System Based on Poisson Distribution Photonics UV communication 4FSK LDPC Poisson maximum likelihood decoding |
| title | Research on Maximum Likelihood Decoding Algorithm and Channel Characteristics Optimization for 4FSK Ultraviolet Communication System Based on Poisson Distribution |
| title_full | Research on Maximum Likelihood Decoding Algorithm and Channel Characteristics Optimization for 4FSK Ultraviolet Communication System Based on Poisson Distribution |
| title_fullStr | Research on Maximum Likelihood Decoding Algorithm and Channel Characteristics Optimization for 4FSK Ultraviolet Communication System Based on Poisson Distribution |
| title_full_unstemmed | Research on Maximum Likelihood Decoding Algorithm and Channel Characteristics Optimization for 4FSK Ultraviolet Communication System Based on Poisson Distribution |
| title_short | Research on Maximum Likelihood Decoding Algorithm and Channel Characteristics Optimization for 4FSK Ultraviolet Communication System Based on Poisson Distribution |
| title_sort | research on maximum likelihood decoding algorithm and channel characteristics optimization for 4fsk ultraviolet communication system based on poisson distribution |
| topic | UV communication 4FSK LDPC Poisson maximum likelihood decoding |
| url | https://www.mdpi.com/2304-6732/12/5/419 |
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