Performance of digital filtering and synchronization method for APD communication receiver
Optical wireless (OW) communication systems face significant challenges, such as signal attenuation due to atmospheric absorption, scattering, and noise from hardware components, which degrade detection sensitivity. To address these challenges, we propose a digital processing algorithm that combines...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2025-09-01
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| Series: | Journal of Electronic Science and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674862X25000242 |
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| _version_ | 1849228343389454336 |
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| author | Hui-Jun Zhang Peng Lin Tong Wang Zi-Qi Zhang Bai-Qiu Zhao Wen-Fang Jiao Xiao-Nan Yu |
| author_facet | Hui-Jun Zhang Peng Lin Tong Wang Zi-Qi Zhang Bai-Qiu Zhao Wen-Fang Jiao Xiao-Nan Yu |
| author_sort | Hui-Jun Zhang |
| collection | DOAJ |
| description | Optical wireless (OW) communication systems face significant challenges, such as signal attenuation due to atmospheric absorption, scattering, and noise from hardware components, which degrade detection sensitivity. To address these challenges, we propose a digital processing algorithm that combines finite-impulse response filtering with dynamic synchronization based on pulse addition and subtraction. Unlike conventional methods, which typically rely solely on hardware optimization or basic thresholding techniques, the proposed approach integrates filtering and synchronization to improve weak-signal detection and reduce noise-induced errors. The proposed algorithm was implemented and verified using a field-programmable gate array. Experiments conducted in an indoor OW communication environment demonstrate that the proposed algorithm significantly improves the detection sensitivity by approximately 6 dB and 5 dB at communication rates of 3.5 Mbps and 5.0 Mbps, respectively. Specifically, under darkroom conditions and a bit error rate of 1 × 10−7, the detection sensitivity was improved from −38.56 dBm to −44.77 dBm at 3.5 Mbps and from −37.12 dBm to −42.29 dBm at 5 Mbps. The proposed algorithm is crucial for the future capture and tracking of signals at large dispersion angles and in underwater and long-distance communication scenarios. |
| format | Article |
| id | doaj-art-04bae636d5144b01a87e0d35a1bf0675 |
| institution | Kabale University |
| issn | 2666-223X |
| language | English |
| publishDate | 2025-09-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Electronic Science and Technology |
| spelling | doaj-art-04bae636d5144b01a87e0d35a1bf06752025-08-23T04:47:54ZengKeAi Communications Co., Ltd.Journal of Electronic Science and Technology2666-223X2025-09-0123310032310.1016/j.jnlest.2025.100323Performance of digital filtering and synchronization method for APD communication receiverHui-Jun Zhang0Peng Lin1Tong Wang2Zi-Qi Zhang3Bai-Qiu Zhao4Wen-Fang Jiao5Xiao-Nan Yu6College of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun, 130022, China; Key Laboratory of Photoelectric Measurement and Control and Optical Information Transfer Technology of Ministry of Education, Changchun University of Science and Technology, Changchun, 130022, ChinaKey Laboratory of Photoelectric Measurement and Control and Optical Information Transfer Technology of Ministry of Education, Changchun University of Science and Technology, Changchun, 130022, ChinaKey Laboratory of Photoelectric Measurement and Control and Optical Information Transfer Technology of Ministry of Education, Changchun University of Science and Technology, Changchun, 130022, ChinaKey Laboratory of Photoelectric Measurement and Control and Optical Information Transfer Technology of Ministry of Education, Changchun University of Science and Technology, Changchun, 130022, ChinaKey Laboratory of Photoelectric Measurement and Control and Optical Information Transfer Technology of Ministry of Education, Changchun University of Science and Technology, Changchun, 130022, ChinaKey Laboratory of Photoelectric Measurement and Control and Optical Information Transfer Technology of Ministry of Education, Changchun University of Science and Technology, Changchun, 130022, ChinaKey Laboratory of Photoelectric Measurement and Control and Optical Information Transfer Technology of Ministry of Education, Changchun University of Science and Technology, Changchun, 130022, China; Corresponding author.Optical wireless (OW) communication systems face significant challenges, such as signal attenuation due to atmospheric absorption, scattering, and noise from hardware components, which degrade detection sensitivity. To address these challenges, we propose a digital processing algorithm that combines finite-impulse response filtering with dynamic synchronization based on pulse addition and subtraction. Unlike conventional methods, which typically rely solely on hardware optimization or basic thresholding techniques, the proposed approach integrates filtering and synchronization to improve weak-signal detection and reduce noise-induced errors. The proposed algorithm was implemented and verified using a field-programmable gate array. Experiments conducted in an indoor OW communication environment demonstrate that the proposed algorithm significantly improves the detection sensitivity by approximately 6 dB and 5 dB at communication rates of 3.5 Mbps and 5.0 Mbps, respectively. Specifically, under darkroom conditions and a bit error rate of 1 × 10−7, the detection sensitivity was improved from −38.56 dBm to −44.77 dBm at 3.5 Mbps and from −37.12 dBm to −42.29 dBm at 5 Mbps. The proposed algorithm is crucial for the future capture and tracking of signals at large dispersion angles and in underwater and long-distance communication scenarios.http://www.sciencedirect.com/science/article/pii/S1674862X25000242Detection sensitivityDigital filteringOptical wireless communicationPhotodetectorSynchronization |
| spellingShingle | Hui-Jun Zhang Peng Lin Tong Wang Zi-Qi Zhang Bai-Qiu Zhao Wen-Fang Jiao Xiao-Nan Yu Performance of digital filtering and synchronization method for APD communication receiver Journal of Electronic Science and Technology Detection sensitivity Digital filtering Optical wireless communication Photodetector Synchronization |
| title | Performance of digital filtering and synchronization method for APD communication receiver |
| title_full | Performance of digital filtering and synchronization method for APD communication receiver |
| title_fullStr | Performance of digital filtering and synchronization method for APD communication receiver |
| title_full_unstemmed | Performance of digital filtering and synchronization method for APD communication receiver |
| title_short | Performance of digital filtering and synchronization method for APD communication receiver |
| title_sort | performance of digital filtering and synchronization method for apd communication receiver |
| topic | Detection sensitivity Digital filtering Optical wireless communication Photodetector Synchronization |
| url | http://www.sciencedirect.com/science/article/pii/S1674862X25000242 |
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